From k9cox at charter.net Sun Mar 1 01:58:02 2015 From: k9cox at charter.net (Ross Stenberg) Date: Sun, 1 Mar 2015 00:58:02 -0600 Subject: [Hallicrafters] SX-100 (and other) gear train tips In-Reply-To: References: <310ABFD19ABB48CEA51EEBA986645851@LILESJLAPTOP> Message-ID: <0934D2DBCCBA4ACFB523C94DCFECA271@RossFlexSDR> There is something to be said for tuning my radio with a mouse, keyboard, touchscreen, or FlexControl. 73 Ross K9COX From hallicrafterssr2000 at k9axn.com Sun Mar 1 11:03:51 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sun, 1 Mar 2015 10:03:51 -0600 Subject: [Hallicrafters] SR-150 Low output In-Reply-To: <54F0BEB3.6060503@knology.net> References: <54F0BEB3.6060503@knology.net> Message-ID: <9BA3EA548FCF46B5877423A9BB4556F8@LILESJLAPTOP> Hi Burt, Couple of suggestions. Take a moment and review the papers that Walt Cates WD0GOF wrote regarding the SR-150. One is meant to bring an SR-150 to factory specs and does so in a very easy to follow format. You should be able to do the job with common ham shack instruments. Several have used Walt's paper with 100% success. Walt has published the same paper for the SR-400 with the same success. I don?t believe you will find technical documentation anywhere else as well written. The very first thing that I would do is replace relay K1 and K2. The Hallicrafters purchasing guys found 2000 of those relays that cost only .25 cents and 300 Kellogg's Wheaties box tops. They have a phenolic plate that the contacts are mounted on which warps, allowing all three contacts to come together. Walt has provided a paper that has part numbers for new relays and the installation procedure. Replace the relays first; they?re responsible for the majority of anomalies in that radio. Kindest regards Jim K9AXN -----Original Message----- From: K4PRF - Burton Pratt Sent: Friday, February 27, 2015 1:00 PM To: hallicrafters at mailman.qth.net Subject: [Hallicrafters] SR-150 Low output I am the original owner of this SR-150 transceiver and just hate the idea of putting it out to pasture. It just will not make power in either SSB or CW. If I unbalance the carrier it will make power which leads me to believe that the final section is functioning properly. All the voltages and resistances are in the park. Tubes have been checked and substituted. If I understand the theory of operation correctly CW output is controlled by bias. If the carrier is being cut off by a bias problem would that also kill the SSB output? Any help will be appreciated. I would love to get this old Hallicrafter back in action. 73, Burt, K4PRF ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From hallicrafterssr2000 at k9axn.com Sun Mar 1 21:39:43 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sun, 1 Mar 2015 20:39:43 -0600 Subject: [Hallicrafters] VFO Backlash gear tips for SR-2000 and SR-400 Message-ID: <4730880A8C7B46C7A5DFEF1C59F4327E@LILESJLAPTOP> The following is a link to a tip that will make it easier to work with VFO Backlash gears. http://www.k9axn.com/_mgxroot/page_10846.html Kindest regards Jim K9AXN From ezrider67 at verizon.net Tue Mar 3 15:07:07 2015 From: ezrider67 at verizon.net (Ed K) Date: Tue, 3 Mar 2015 20:07:07 +0000 (UTC) Subject: [Hallicrafters] SR -150 Low Output Message-ID: <1784218758.2091264.1425413227510.JavaMail.yahoo@mail.yahoo.com> Where can the papers that Walt Cates wrote ?addressing the low output be found? From davemarquart at gmail.com Tue Mar 3 23:52:37 2015 From: davemarquart at gmail.com (Dave Marquart) Date: Tue, 3 Mar 2015 20:52:37 -0800 Subject: [Hallicrafters] S37 parts Message-ID: I have the following S-37 parts available.. AC Power Supply Filter R-55 (S meter adjust) 1500 ohm T-12 Transformer Plate 52A043 T-11 Transformer Filament 52A044 L-4 Choke 56B011 L-5 Choke 56B012 SO2 SO3 (Chris) Ant Tuning Shaft plus parts Gear Drive Assembly Fuse Holder Metal Main Tuning Dial and Indicator 33C127 (Chris) Vernier Scale Top RF cover 70C607-B RF Deck with parts / some tubes All RF transformers with Hallicrafter H Front Panel (not the best ? rust spots) Anything you may need for your project let me know. Dave W7VT davemarquart at gmail.com 208-559-4747 -- Dave Marquart 3100 E Victory Rd Meridian, ID 83642 208 559-4747 cell davemarquart at gmail.com From davemarquart at gmail.com Wed Mar 4 10:38:06 2015 From: davemarquart at gmail.com (Dave Marquart) Date: Wed, 4 Mar 2015 07:38:06 -0800 Subject: [Hallicrafters] question Message-ID: I am not able to post to this site.. what can I do to fix this problem> Dave -- Dave Marquart 3100 E Victory Rd Meridian, ID 83642 208 559-4747 cell davemarquart at gmail.com From k1lky68 at gmail.com Wed Mar 4 11:11:28 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Wed, 4 Mar 2015 11:11:28 -0500 Subject: [Hallicrafters] question In-Reply-To: References: Message-ID: <6152FDF2-0D25-4003-8106-559B23F49A2E@gmail.com> On Mar 4, 2015, at 10:38 AM, Dave Marquart wrote: > I am not able to post to this site.. what can > I do to fix this problem> Dave, Your message to the mail list reflector did go out, presumably to all recipients. You may not see your message reflected to you via the list - many mail list systems don?t send a copy to the person who posted it (an annoyance to me!) If you are talking about uploading pictures or other things to the mailing list web site, that?s another story I?m not too familiar with. Some mailing lists have a members web site that will host pictures or other files put there by members, for later retrieval by other list members. Roy Roy Morgan k1lky68 at gmail.com K1LKY Since 1958 From rbethman at comcast.net Wed Mar 4 11:11:56 2015 From: rbethman at comcast.net (rbethman) Date: Wed, 04 Mar 2015 11:11:56 -0500 Subject: [Hallicrafters] question In-Reply-To: References: Message-ID: <54F72ECC.5050703@comcast.net> Dave, What are you calling "site"? If you are referring to this "list", then you are indeed posting to the Hallicrafters mailing reflector. The fact that a single post took more than the usual time to appear, is most likely an issue with the server farm that these lists are run on. A single or many messages "can", and sometimes "do" get caught in the queue and takes the owner of the server farm a fair bit of effort to loctae the cause, and get it flowing properly again. You are using Google's G mail. It has been known to do strange things from time to time. Regards, Bob - N0DGN On 3/4/2015 10:38 AM, Dave Marquart wrote: > I am not able to post to this site.. what can > I do to fix this problem> > > Dave > From hallicrafterssr2000 at k9axn.com Fri Mar 6 12:21:34 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Fri, 6 Mar 2015 11:21:34 -0600 Subject: [Hallicrafters] Black Beauty capacitors Beware Message-ID: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> The ER article regarding Black Beauty capacitors has an assumption that needs attention. All of the 50 Kc I.F. systems in the Hallicrafters receivers beginning from day 1 used Paper or Plastic film capacitors except one, the flagship SX-115 which used Ceramic disc Z5U capacitors. This was a disaster that only becomes worse year after year. The selectivity circuits in the SX-117 using film handily outperform the SX-115. We talked about the reason for this in an earlier post so won?t repeat all here. I have never seen a schematic drawn by the Hallicrafters Co. that referred to a film or plastic capacitor, just Paper, even though they switched to plastic film well before the SX-100 was built. The reference to paper is to assure that Ceramic is NOT used in the noted circuit. You will find paper and ceramic of the same value in these radios so why distinguish? There is a notion that the paper capacitors had some peculiar property when used in the 50 Kc I.F. system or any other circuit that would enhance the performance of the radio. The purpose of the capacitors in the 50 Kc selectivity circuits is but one. Move the band pass center away from the 50Kc carrier to a point where widening the band pass with resistors would not require shifting the BFO. Nothing more. In the SX-115, using Ceramic Z5U capacitors resulted in shifting the band pass centers to anywhere but where they belong and it gets worse over time. Why the problem with the SX-115? Find out for yourself. Measure the capacitors. The .01uf caps will be approximately .0082uf. That?s because Ceramic disc class 3 capacitors loose 5% of their capacity every decade. Take it a step further. The Z5U has a +20 ?56 temperature coefficient. If you heat the caps to 20 degrees C over room temperature which is the expected temp deviation in the radio, the capacitor will end up at about .0072uf to .0074uf. The paper or film will be .01uf. Result, the band passes are significantly misplaced. Alas, lost in space looking for GPS coordinates! In audio circuits the notion that paper has some magic and mirrors in comparison to film is campfire talk. In comparison to ceramic class 2 and 3, it is no longer campfire talk but irrefutable fact. Kindest regards Jim K9AXN From anchor at ec.rr.com Fri Mar 6 13:03:28 2015 From: anchor at ec.rr.com (Al Parker) Date: Fri, 06 Mar 2015 13:03:28 -0500 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> Message-ID: <54F9EBF0.6000503@ec.rr.com> Many thanks, Jim, I use my SX-115 weekly on The Vintage Sideband Net and for some time have been thinking the selectivity wasn't what it used to/should be. This helps it get to the top of the to-do list, shortly below getting the SR-2000 on the air (which just could be this weekend). tnx agn, 73, Al, W8UT www.boatanchors.org www.hammarlund.info "There is nothing -- absolutely nothing -- half so much worth doing as simply messing about in boats" Ratty, to Mole On 3/6/2015 12:21 PM, Jim Liles wrote: > The ER article regarding Black Beauty capacitors has an assumption that needs attention. > > All of the 50 Kc I.F. systems in the Hallicrafters receivers beginning from day 1 used Paper or Plastic film capacitors except one, the flagship SX-115 which used Ceramic disc Z5U capacitors. This was a disaster that only becomes worse year after year. > > The selectivity circuits in the SX-117 using film handily outperform the SX-115. We talked about the reason for this in an earlier post so won?t repeat all here. > > I have never seen a schematic drawn by the Hallicrafters Co. that referred to a film or plastic capacitor, just Paper, even though they switched to plastic film well before the SX-100 was built. The reference to paper is to assure that Ceramic is NOT used in the noted circuit. You will find paper and ceramic of the same value in these radios so why distinguish? > > There is a notion that the paper capacitors had some peculiar property when used in the 50 Kc I.F. system or any other circuit that would enhance the performance of the radio. > > The purpose of the capacitors in the 50 Kc selectivity circuits is but one. Move the band pass center away from the 50Kc carrier to a point where widening the band pass with resistors would not require shifting the BFO. Nothing more. > > In the SX-115, using Ceramic Z5U capacitors resulted in shifting the band pass centers to anywhere but where they belong and it gets worse over time. > > Why the problem with the SX-115? Find out for yourself. Measure the capacitors. The .01uf caps will be approximately .0082uf. That?s because Ceramic disc class 3 capacitors loose 5% of their capacity every decade. > > Take it a step further. The Z5U has a +20 ?56 temperature coefficient. If you heat the caps to 20 degrees C over room temperature which is the expected temp deviation in the radio, the capacitor will end up at about .0072uf to .0074uf. The paper or film will be .01uf. > > Result, the band passes are significantly misplaced. Alas, lost in space looking for GPS coordinates! > > In audio circuits the notion that paper has some magic and mirrors in comparison to film is campfire talk. In comparison to ceramic class 2 and 3, it is no longer campfire talk but irrefutable fact. > > Kindest regards Jim K9AXN > ______________________________________________________________ > Hallicrafters mailing list From hallicrafters at mailman.qth.net Fri Mar 6 21:51:10 2015 From: hallicrafters at mailman.qth.net (chuck groome via Hallicrafters) Date: Fri, 6 Mar 2015 21:51:10 -0500 Subject: [Hallicrafters] sr-500 Message-ID: <7880a.740281f0.422bcfad@aol.com> Hallicrafters SR-500 (http://www.eham.net/classifieds/save) Offered for sale is this SR-500 Hallicrafters with the original 8236s.It has no issues.P.S. Not included.It is a 8 out of 10.499.95 sorry no pay pal. It has had a new Rebuilt VFO installed as well as a new carrier osc crystal ,numerous tubes,caps and resistors. Complete alignment also.I have been using a h.b. p.s. which i dont want to sell.Just have b+,Bias,L.V.,filment and your in business.This transceiver has no issues.If your not happy in 30 days send it back for a refund{you pay return shipping}.Email for pictures if interested.499.95 shipped to your door in the lower 48. Thanks Email: chuckgroome at aol.com From hallicrafters at mailman.qth.net Sat Mar 7 09:15:04 2015 From: hallicrafters at mailman.qth.net (Greg Gore via Hallicrafters) Date: Sat, 7 Mar 2015 09:15:04 -0500 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> Message-ID: <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com> Thanks Jim, Is this why you don't see much improvement replacing black beauties in the selectivity circuits of Hallicrafters 50KC systems? The capacitance of the molded capacitors has not changed much over the years while leakage at high voltages is almost always excessive and dangerous. Regards, Greg -----Original Message----- From: Jim Liles To: hallicrafters Sent: Fri, Mar 6, 2015 12:26 pm Subject: [Hallicrafters] Black Beauty capacitors Beware The ER article regarding Black Beauty capacitors has an assumption that needs attention. All of the 50 Kc I.F. systems in the Hallicrafters receivers beginning from day 1 used Paper or Plastic film capacitors except one, the flagship SX-115 which used Ceramic disc Z5U capacitors. This was a disaster that only becomes worse year after year. The selectivity circuits in the SX-117 using film handily outperform the SX-115. We talked about the reason for this in an earlier post so won?t repeat all here. I have never seen a schematic drawn by the Hallicrafters Co. that referred to a film or plastic capacitor, just Paper, even though they switched to plastic film well before the SX-100 was built. The reference to paper is to assure that Ceramic is NOT used in the noted circuit. You will find paper and ceramic of the same value in these radios so why distinguish? There is a notion that the paper capacitors had some peculiar property when used in the 50 Kc I.F. system or any other circuit that would enhance the performance of the radio. The purpose of the capacitors in the 50 Kc selectivity circuits is but one. Move the band pass center away from the 50Kc carrier to a point where widening the band pass with resistors would not require shifting the BFO. Nothing more. In the SX-115, using Ceramic Z5U capacitors resulted in shifting the band pass centers to anywhere but where they belong and it gets worse over time. Why the problem with the SX-115? Find out for yourself. Measure the capacitors. The .01uf caps will be approximately .0082uf. That?s because Ceramic disc class 3 capacitors loose 5% of their capacity every decade. Take it a step further. The Z5U has a +20 ?56 temperature coefficient. If you heat the caps to 20 degrees C over room temperature which is the expected temp deviation in the radio, the capacitor will end up at about .0072uf to .0074uf. The paper or film will be .01uf. Result, the band passes are significantly misplaced. Alas, lost in space looking for GPS coordinates! In audio circuits the notion that paper has some magic and mirrors in comparison to film is campfire talk. In comparison to ceramic class 2 and 3, it is no longer campfire talk but irrefutable fact. Kindest regards Jim K9AXN ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From n0alo at cox.net Sat Mar 7 10:12:59 2015 From: n0alo at cox.net (Lynn Brock) Date: Sat, 07 Mar 2015 09:12:59 -0600 Subject: [Hallicrafters] Duane Message-ID: <54FB157B.9080006@cox.net> Hey Duane - please contact me off list please. Lynn From radio at daileyservices.com Sat Mar 7 10:14:53 2015 From: radio at daileyservices.com (Tom Dailey) Date: Sat, 7 Mar 2015 08:14:53 -0700 Subject: [Hallicrafters] BBODs In-Reply-To: References: Message-ID: BBODs - Black Beauties of Death - have been discussed ad nauseum here, but point of fact is that they're BAD. Period. I've seen 'em split, DEAD-shorted, leaky, and every other thing. You may not see immediate improvement, but not changing them will result in DEATH of many things; not the least being the B+ windings on your pwr xfmr. Yes, there are many differences in caps, and the explanation by Jim, was spot on. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From hallicrafterssr2000 at k9axn.com Sat Mar 7 10:20:35 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sat, 7 Mar 2015 09:20:35 -0600 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com> Message-ID: Hi Greg, Exactly! They were as good as film and legions better than ceramic. That?s why you still see paper defined on the schematics not ceramic caps. I still would replace the paper because as they dry out or begin to leak the Q goes to the devil. Won?t effect the .5Kc position because it doesn?t use them but when you use the higher band widths, especially the 1Kc, they will widen because of the denigration of the Q. May not be obvious but if you sweep that filter system it?s obvious. The band center skew jumps out at you when using the ceramic caps. In any case the paper at their worst will out perform ceramic unless they are shorted or open. One measure is, you should be able to tune in an SSB signal in the 5Kc position and dial right down through 1Kc and still clearly copy that conversation without touching the BFO and tuning to peak for clarity. The best definition that describes what you have to do when incorrect caps are installed is ?You have to be a human I.F. shift mechanism? You have to tune an SSB signal then tune slightly back and fourth for peak strength while adjusting the BFO for clarity. You don?t want to go there, let the radio do it for you. One thing that I didn?t mention is the 390 ohm resistor will be well above 420 ohms. Those resistors are very critical. Get it right on or 5% below not above or the 5Kc position will droop excessively. Kindest regards Jim K9AXN -----Original Message----- From: Greg Gore Sent: Saturday, March 07, 2015 8:15 AM To: hallicrafterssr2000 at k9axn.com ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Black Beauty capacitors Beware Thanks Jim, Is this why you don't see much improvement replacing black beauties in the selectivity circuits of Hallicrafters 50KC systems? The capacitance of the molded capacitors has not changed much over the years while leakage at high voltages is almost always excessive and dangerous. Regards, Greg -----Original Message----- From: Jim Liles To: hallicrafters Sent: Fri, Mar 6, 2015 12:26 pm Subject: [Hallicrafters] Black Beauty capacitors Beware The ER article regarding Black Beauty capacitors has an assumption that needs attention. All of the 50 Kc I.F. systems in the Hallicrafters receivers beginning from day 1 used Paper or Plastic film capacitors except one, the flagship SX-115 which used Ceramic disc Z5U capacitors. This was a disaster that only becomes worse year after year. The selectivity circuits in the SX-117 using film handily outperform the SX-115. We talked about the reason for this in an earlier post so won?t repeat all here. I have never seen a schematic drawn by the Hallicrafters Co. that referred to a film or plastic capacitor, just Paper, even though they switched to plastic film well before the SX-100 was built. The reference to paper is to assure that Ceramic is NOT used in the noted circuit. You will find paper and ceramic of the same value in these radios so why distinguish? There is a notion that the paper capacitors had some peculiar property when used in the 50 Kc I.F. system or any other circuit that would enhance the performance of the radio. The purpose of the capacitors in the 50 Kc selectivity circuits is but one. Move the band pass center away from the 50Kc carrier to a point where widening the band pass with resistors would not require shifting the BFO. Nothing more. In the SX-115, using Ceramic Z5U capacitors resulted in shifting the band pass centers to anywhere but where they belong and it gets worse over time. Why the problem with the SX-115? Find out for yourself. Measure the capacitors. The .01uf caps will be approximately .0082uf. That?s because Ceramic disc class 3 capacitors loose 5% of their capacity every decade. Take it a step further. The Z5U has a +20 ?56 temperature coefficient. If you heat the caps to 20 degrees C over room temperature which is the expected temp deviation in the radio, the capacitor will end up at about .0072uf to .0074uf. The paper or film will be .01uf. Result, the band passes are significantly misplaced. Alas, lost in space looking for GPS coordinates! In audio circuits the notion that paper has some magic and mirrors in comparison to film is campfire talk. In comparison to ceramic class 2 and 3, it is no longer campfire talk but irrefutable fact. Kindest regards Jim K9AXN ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net? List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From hallicrafterssr2000 at k9axn.com Sat Mar 7 10:24:54 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sat, 7 Mar 2015 09:24:54 -0600 Subject: [Hallicrafters] BBODs In-Reply-To: References: Message-ID: <6F0CDCDF3B334AE5807B66B1BDC48DE4@LILESJLAPTOP> Tom, I totally agree. The BB caps can and will do damage not if but when. Thanks for the response and reminding me. Kindest regards Jim K9AXN -----Original Message----- From: Tom Dailey Sent: Saturday, March 07, 2015 9:14 AM To: hallicrafters at mailman.qth.net Subject: [Hallicrafters] BBODs BBODs - Black Beauties of Death - have been discussed ad nauseum here, but point of fact is that they're BAD. Period. I've seen 'em split, DEAD-shorted, leaky, and every other thing. You may not see immediate improvement, but not changing them will result in DEATH of many things; not the least being the B+ windings on your pwr xfmr. Yes, there are many differences in caps, and the explanation by Jim, was spot on. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From n1rj at roadrunner.com Sat Mar 7 14:05:55 2015 From: n1rj at roadrunner.com (Roger D Johnson) Date: Sat, 07 Mar 2015 14:05:55 -0500 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> Message-ID: <54FB4C13.1050609@roadrunner.com> I've just noticed something strange about these IF strips that I hadn't seen before. The first set of capacitors on the selectivity switch have the cold ends connected to B+ while the second set has the cold ends grounded. Anyone know why Hallicrafters did this? 73, Roger From n1rj at roadrunner.com Sat Mar 7 14:08:54 2015 From: n1rj at roadrunner.com (Roger D Johnson) Date: Sat, 07 Mar 2015 14:08:54 -0500 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <54FB4C13.1050609@roadrunner.com> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <54FB4C13.1050609@roadrunner.com> Message-ID: <54FB4CC6.1030104@roadrunner.com> The cold ends of the first set are at RF ground due to a bypass cap. I just can't figure out why Halli would put B+ on one set of caps and not on the other! On 3/7/2015 2:05 PM, Roger D Johnson wrote: > I've just noticed something strange about these IF strips that I hadn't seen > before. The first set of > capacitors on the selectivity switch have the cold ends connected to B+ while > the second set has > the cold ends grounded. Anyone know why Hallicrafters did this? > > 73, Roger > > > > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > From hallicrafterssr2000 at k9axn.com Sat Mar 7 14:45:20 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sat, 7 Mar 2015 13:45:20 -0600 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <54FB4CC6.1030104@roadrunner.com> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP><54FB4C13.1050609@roadrunner.com> <54FB4CC6.1030104@roadrunner.com> Message-ID: <6C336FCB6C9F491C928BA0DADCCEE4E5@LILESJLAPTOP> Hi Roger, What model? Kindest regards Jim K9AXN -----Original Message----- From: Roger D Johnson Sent: Saturday, March 07, 2015 1:08 PM To: hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Black Beauty capacitors Beware The cold ends of the first set are at RF ground due to a bypass cap. I just can't figure out why Halli would put B+ on one set of caps and not on the other! On 3/7/2015 2:05 PM, Roger D Johnson wrote: > I've just noticed something strange about these IF strips that I hadn't > seen before. The first set of > capacitors on the selectivity switch have the cold ends connected to B+ > while the second set has > the cold ends grounded. Anyone know why Hallicrafters did this? > > 73, Roger > > > > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From n1rj at roadrunner.com Sat Mar 7 15:24:06 2015 From: n1rj at roadrunner.com (Roger D Johnson) Date: Sat, 07 Mar 2015 15:24:06 -0500 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <6C336FCB6C9F491C928BA0DADCCEE4E5@LILESJLAPTOP> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP><54FB4C13.1050609@roadrunner.com> <54FB4CC6.1030104@roadrunner.com> <6C336FCB6C9F491C928BA0DADCCEE4E5@LILESJLAPTOP> Message-ID: <54FB5E66.90509@roadrunner.com> It seem to be throughout the lines. S-76, SX-96, SX-100, etc. On 3/7/2015 2:45 PM, Jim Liles wrote: > Hi Roger, > > What model? > > Kindest regards Jim K9AXN > > -----Original Message----- From: Roger D Johnson > Sent: Saturday, March 07, 2015 1:08 PM > To: hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > > The cold ends of the first set are at RF ground due to a bypass cap. I just > can't figure out why Halli > would put B+ on one set of caps and not on the other! > > On 3/7/2015 2:05 PM, Roger D Johnson wrote: >> I've just noticed something strange about these IF strips that I hadn't seen >> before. The first set of >> capacitors on the selectivity switch have the cold ends connected to B+ while >> the second set has >> the cold ends grounded. Anyone know why Hallicrafters did this? >> >> 73, Roger >> >> >> >> >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > From 1oldlens1 at ix.netcom.com Sat Mar 7 16:53:14 2015 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Sat, 07 Mar 2015 13:53:14 -0800 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <54FB4C13.1050609@roadrunner.com> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <54FB4C13.1050609@roadrunner.com> Message-ID: <54FB734A.6050808@ix.netcom.com> I am guessing a little here. The caps are for mutual coupling to control the bandwidth of the transformer. The curved line on the symbol and line at one end of the capacitor indicates the outside foil. I suspect that the arrangement is to reduce coupling between the two capacitors. As far as connection to the B+ one is on the plate side of the transformer and the other on the side feeding the following grid. Maybe you are talking about something else here. I mean the caps on the 50 khz IF. On 3/7/2015 11:05 AM, Roger D Johnson wrote: > I've just noticed something strange about these IF strips that I > hadn't seen before. The first set of > capacitors on the selectivity switch have the cold ends connected to > B+ while the second set has > the cold ends grounded. Anyone know why Hallicrafters did this? > > 73, Roger > > > > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL From dhallam at knology.net Sat Mar 7 17:01:26 2015 From: dhallam at knology.net (David C. Hallam) Date: Sat, 07 Mar 2015 17:01:26 -0500 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com> Message-ID: <54FB7536.4090101@knology.net> Jim, What is the recommend procedure to sweep the the filter? I do not have a sweep generator but do have a good assortment of test equipment. David KW4DH On 3/7/2015 10:20 AM, Jim Liles wrote: > Hi Greg, > good assoermentr > Exactly! They were as good as film and legions better than ceramic. That?s why you still see paper defined on the schematics not ceramic caps. > > I still would replace the paper because as they dry out or begin to leak the Q goes to the devil. Won?t effect the .5Kc position because it doesn?t use them but when you use the higher band widths, especially the 1Kc, they will widen because of the denigration of the Q. May not be obvious but if you sweep that filter system it?s obvious. The band center skew jumps out at you when using the ceramic caps. > > In any case the paper at their worst will out perform ceramic unless they are shorted or open. > > One measure is, you should be able to tune in an SSB signal in the 5Kc position and dial right down through 1Kc and still clearly copy that conversation without touching the BFO and tuning to peak for clarity. The best definition that describes what you have to do when incorrect caps are installed is ?You have to be a human I.F. shift mechanism? You have to tune an SSB signal then tune slightly back and fourth for peak strength while adjusting the BFO for clarity. You don?t want to go there, let the radio do it for you. > > One thing that I didn?t mention is the 390 ohm resistor will be well above 420 ohms. Those resistors are very critical. Get it right on or 5% below not above or the 5Kc position will droop excessively. > > Kindest regards Jim K9AXN > > > > > > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 -- There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery. Enrico Fermi ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 From hallicrafterssr2000 at k9axn.com Sat Mar 7 22:06:37 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sat, 7 Mar 2015 21:06:37 -0600 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <54FB7536.4090101@knology.net> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com> <54FB7536.4090101@knology.net> Message-ID: Dave, Tell us what equipment that you have available and we'll see what we can do to configure it to make it happen. Have you done any sweep analysis? Kindest regards Jim K9AXN -----Original Message----- From: David C. Hallam Sent: Saturday, March 07, 2015 4:01 PM To: hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Black Beauty capacitors Beware Jim, What is the recommend procedure to sweep the the filter? I do not have a sweep generator but do have a good assortment of test equipment. David KW4DH On 3/7/2015 10:20 AM, Jim Liles wrote: > Hi Greg, > good assoermentr > Exactly! They were as good as film and legions better than ceramic. That?s why you still see paper defined on the schematics not ceramic caps. > > I still would replace the paper because as they dry out or begin to leak the Q goes to the devil. Won?t effect the .5Kc position because it doesn?t use them but when you use the higher band widths, especially the 1Kc, they will widen because of the denigration of the Q. May not be obvious but if you sweep that filter system it?s obvious. The band center skew jumps out at you when using the ceramic caps. > > In any case the paper at their worst will out perform ceramic unless they are shorted or open. > > One measure is, you should be able to tune in an SSB signal in the 5Kc position and dial right down through 1Kc and still clearly copy that conversation without touching the BFO and tuning to peak for clarity. The best definition that describes what you have to do when incorrect caps are installed is ?You have to be a human I.F. shift mechanism? You have to tune an SSB signal then tune slightly back and fourth for peak strength while adjusting the BFO for clarity. You don?t want to go there, let the radio do it for you. > > One thing that I didn?t mention is the 390 ohm resistor will be well above 420 ohms. Those resistors are very critical. Get it right on or 5% below not above or the 5Kc position will droop excessively. > > Kindest regards Jim K9AXN > > > > > > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 -- There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery. Enrico Fermi ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From hallicrafterssr2000 at k9axn.com Sat Mar 7 23:02:16 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sat, 7 Mar 2015 22:02:16 -0600 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <54FB5E66.90509@roadrunner.com> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP><54FB4C13.1050609@roadrunner.com><54FB4CC6.1030104@roadrunner.com><6C336FCB6C9F491C928BA0DADCCEE4E5@LILESJLAPTOP> <54FB5E66.90509@roadrunner.com> Message-ID: Hi Roger, Same in all but using the SX-115 schematic. The first transformer set used C73 as a bypass capacitor and to provide an RF ground reference to drive V11 the I.F. amplifier. The second transformer set is isolated from the B+ because it needs a DC ground reference to drive the detector and product detector. C86 is used as a bypass and completes the tuned circuit isolating the B+ from the output. What I forgot to add in the earlier posts was C73 and C86 have to be changed to Polypropylene. These same capacitors although different C numbers in all of the 50Kc I.F. radios have to be changed to Polypropylene because they compound the band pass skew problem that the ceramic caps do in the SX-115 selectivity switch. Hope this helps Roger. Kindest regards Jim K9AXN -----Original Message----- From: Roger D Johnson Sent: Saturday, March 07, 2015 2:24 PM To: Jim Liles Cc: hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Black Beauty capacitors Beware It seem to be throughout the lines. S-76, SX-96, SX-100, etc. On 3/7/2015 2:45 PM, Jim Liles wrote: > Hi Roger, > > What model? > > Kindest regards Jim K9AXN > > -----Original Message----- From: Roger D Johnson > Sent: Saturday, March 07, 2015 1:08 PM > To: hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > > The cold ends of the first set are at RF ground due to a bypass cap. I just > can't figure out why Halli > would put B+ on one set of caps and not on the other! > > On 3/7/2015 2:05 PM, Roger D Johnson wrote: >> I've just noticed something strange about these IF strips that I hadn't seen >> before. The first set of >> capacitors on the selectivity switch have the cold ends connected to B+ while >> the second set has >> the cold ends grounded. Anyone know why Hallicrafters did this? >> >> 73, Roger From jbalestrini at surewest.net Sun Mar 8 09:30:35 2015 From: jbalestrini at surewest.net (Joe Balestrini) Date: Sun, 8 Mar 2015 06:30:35 -0700 Subject: [Hallicrafters] Hallicrafters x16 rebuild Message-ID: <0A0BC69F-005A-4A94-A8A3-1549753654C5@surewest.net> Hi all, I?m starting a rebuild of an SX16 that is electrically in very bad shape. I?d like to remove the RF deck and variable condenser. Does anyone have experience and advice for this removal effort? Thanks. Joe From dhallam at knology.net Sun Mar 8 09:38:03 2015 From: dhallam at knology.net (David C. Hallam) Date: Sun, 08 Mar 2015 09:38:03 -0400 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com> <54FB7536.4090101@knology.net> Message-ID: <54FC50BB.8030704@knology.net> Jim, TEK 465 scope HP 606B/8708A SG HP 410C vtvm HP 141T/8552B/8553B SA HP 8443A tracking generator HP 5246L FC I also have an old EICO 369 sweep generator but I am not sure it is working properly. David On 3/7/2015 10:06 PM, Jim Liles wrote: > Dave, > Tell us what equipment that you have available and we'll see what we > can do to configure it to make it happen. Have you done any sweep > analysis? > Kindest regards Jim K9AXN > -----Original Message----- > From: David C. Hallam > Sent: Saturday, March 07, 2015 4:01 PM > To: hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > Jim, > What is the recommend procedure to sweep the the filter? I do not have > a sweep generator but do have a good assortment of test equipment. > David > KW4DH > On 3/7/2015 10:20 AM, Jim Liles wrote: > > Hi Greg, > > good assoermentr > > Exactly! They were as good as film and legions better than > ceramic. That?s why you still see paper defined on the schematics not > ceramic caps. > > > > I still would replace the paper because as they dry out or begin to > leak the Q goes to the devil. Won?t effect the .5Kc position because > it doesn?t use them but when you use the higher band widths, > especially the 1Kc, they will widen because of the denigration of the > Q. May not be obvious but if you sweep that filter system it?s > obvious. The band center skew jumps out at you when using the ceramic > caps. > > > > In any case the paper at their worst will out perform ceramic unless > they are shorted or open. > > > > One measure is, you should be able to tune in an SSB signal in the > 5Kc position and dial right down through 1Kc and still clearly copy > that conversation without touching the BFO and tuning to peak for > clarity. The best definition that describes what you have to do when > incorrect caps are installed is ?You have to be a human I.F. shift > mechanism? You have to tune an SSB signal then tune slightly back and > fourth for peak strength while adjusting the BFO for clarity. You > don?t want to go there, let the radio do it for you. > > > > One thing that I didn?t mention is the 390 ohm resistor will be well > above 420 ohms. Those resistors are very critical. Get it right on > or 5% below not above or the 5Kc position will droop excessively. > > > > Kindest regards Jim K9AXN > > > > > > > > > > > > > > > > > > ----- > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: > 03/07/15 > -- > There are two possible outcomes: if the result confirms the > hypothesis, then you've made a measurement. > If the result is contrary to the hypothesis, then you've made a discovery. > Enrico Fermi > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 > -- There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery. Enrico Fermi ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9253 - Release Date: 03/08/15 From hallicrafterssr2000 at k9axn.com Sun Mar 8 14:07:28 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sun, 8 Mar 2015 13:07:28 -0500 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <54FC50BB.8030704@knology.net> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com><54FB7536.4090101@knology.net> <54FC50BB.8030704@knology.net> Message-ID: Hi Dave, I sent a response with attached photos of a sweep of an SX-117 but it failed. So I resent the narrative and will add the photos to the K9AXN web site. First off Dave, I don?t see anything in the mix that will reach down to 50Kc. Help me out on that one. Haven?t used that gear for years and years. I don't see anything in the mix that can do a sweep except maybe the 8443A and 141T but I don?t think they make it down to 50Kc. I believe the output of the tracking generator is a bit high for the I.F.Sweep so will probably need an attenuator. You need to get down to the millivolt levels for I.F. and microvolt levels for the front end sweeps. What is its minimum output. Been a long time since I used a 141T but as I recall it has a storage CRT standard. Does the storage function in your 141 work and are you familiar with its use? If the storage function works, you can do a single manual sweep by simply turning the frequency knob on the SG letting the 141 store the trace. I have to admit I?ve never used a tracking generator, never needed to do so. Most Spectrum analyzers have storage CRT or max hold functions. What?s the difference? About 30 seconds of your time and you can inject a precision signal of any amplitude, composition, or purity. Let us know if the storage function works and if you?re familiar with it?s use. The attached photos are of the SX-117 band pass .5Kc and 2.5Kc settings. The 2.5Kc wave form looks to be only slightly wider than the .5Kc because we doubled the sweep rate compressing the image. We used an HP 3325A which uses a TTL transition for a matker. The down transition is the 50Kc point. The .5Kc trace is 250 cycles per graticule and the 2.5Kc trace is .5Kc per graticule. Kindest regards Jim K9AXN -----Original Message----- From: David C. Hallam Sent: Sunday, March 08, 2015 8:38 AM To: Jim Liles ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Black Beauty capacitors Beware Jim, TEK 465 scope HP 606B/8708A SG HP 410C vtvm HP 141T/8552B/8553B SA HP 8443A tracking generator HP 5246L FC I also have an old EICO 369 sweep generator but I am not sure it is working properly. David On 3/7/2015 10:06 PM, Jim Liles wrote: > Dave, > Tell us what equipment that you have available and we'll see what we can > do to configure it to make it happen. Have you done any sweep analysis? > Kindest regards Jim K9AXN > -----Original Message----- > From: David C. Hallam > Sent: Saturday, March 07, 2015 4:01 PM > To: hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > Jim, > What is the recommend procedure to sweep the the filter? I do not have > a sweep generator but do have a good assortment of test equipment. > David > KW4DH > On 3/7/2015 10:20 AM, Jim Liles wrote: > > Hi Greg, > > good assoermentr > > Exactly! They were as good as film and legions better than > ceramic. That?s why you still see paper defined on the schematics not > ceramic caps. > > > > I still would replace the paper because as they dry out or begin to > leak the Q goes to the devil. Won?t effect the .5Kc position because it > doesn?t use them but when you use the higher band widths, especially the > 1Kc, they will widen because of the denigration of the Q. May not be > obvious but if you sweep that filter system it?s obvious. The band center > skew jumps out at you when using the ceramic caps. > > > > In any case the paper at their worst will out perform ceramic unless > they are shorted or open. > > > > One measure is, you should be able to tune in an SSB signal in the > 5Kc position and dial right down through 1Kc and still clearly copy that > conversation without touching the BFO and tuning to peak for clarity. The > best definition that describes what you have to do when incorrect caps are > installed is ?You have to be a human I.F. shift mechanism? You have to > tune an SSB signal then tune slightly back and fourth for peak strength > while adjusting the BFO for clarity. You don?t want to go there, let the > radio do it for you. > > > > One thing that I didn?t mention is the 390 ohm resistor will be well > above 420 ohms. Those resistors are very critical. Get it right on or 5% > below not above or the 5Kc position will droop excessively. > > > > Kindest regards Jim K9AXN > > > > > > > > > > > > > > > > > > ----- > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: > 03/07/15 > -- > There are two possible outcomes: if the result confirms the hypothesis, > then you've made a measurement. > If the result is contrary to the hypothesis, then you've made a discovery. > Enrico Fermi > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 > -- There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery. Enrico Fermi ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9253 - Release Date: 03/08/15 ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl -----Original Message----- From: David C. Hallam Sent: Sunday, March 08, 2015 8:38 AM To: Jim Liles ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Black Beauty capacitors Beware Jim, TEK 465 scope HP 606B/8708A SG HP 410C vtvm HP 141T/8552B/8553B SA HP 8443A tracking generator HP 5246L FC I also have an old EICO 369 sweep generator but I am not sure it is working properly. David On 3/7/2015 10:06 PM, Jim Liles wrote: > Dave, > Tell us what equipment that you have available and we'll see what we can > do to configure it to make it happen. Have you done any sweep analysis? > Kindest regards Jim K9AXN > -----Original Message----- > From: David C. Hallam > Sent: Saturday, March 07, 2015 4:01 PM > To: hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > Jim, > What is the recommend procedure to sweep the the filter? I do not have > a sweep generator but do have a good assortment of test equipment. > David > KW4DH > On 3/7/2015 10:20 AM, Jim Liles wrote: > > Hi Greg, > > good assoermentr > > Exactly! They were as good as film and legions better than > ceramic. That?s why you still see paper defined on the schematics not > ceramic caps. > > > > I still would replace the paper because as they dry out or begin to > leak the Q goes to the devil. Won?t effect the .5Kc position because it > doesn?t use them but when you use the higher band widths, especially the > 1Kc, they will widen because of the denigration of the Q. May not be > obvious but if you sweep that filter system it?s obvious. The band center > skew jumps out at you when using the ceramic caps. > > > > In any case the paper at their worst will out perform ceramic unless > they are shorted or open. > > > > One measure is, you should be able to tune in an SSB signal in the > 5Kc position and dial right down through 1Kc and still clearly copy that > conversation without touching the BFO and tuning to peak for clarity. The > best definition that describes what you have to do when incorrect caps are > installed is ?You have to be a human I.F. shift mechanism? You have to > tune an SSB signal then tune slightly back and fourth for peak strength > while adjusting the BFO for clarity. You don?t want to go there, let the > radio do it for you. > > > > One thing that I didn?t mention is the 390 ohm resistor will be well > above 420 ohms. Those resistors are very critical. Get it right on or 5% > below not above or the 5Kc position will droop excessively. > > > > Kindest regards Jim K9AXN > > > > > > > > > > > > > > > > > > ----- > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: > 03/07/15 > -- > There are two possible outcomes: if the result confirms the hypothesis, > then you've made a measurement. > If the result is contrary to the hypothesis, then you've made a discovery. > Enrico Fermi > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 > -- There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery. Enrico Fermi ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9253 - Release Date: 03/08/15 ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From dhallam at knology.net Sun Mar 8 14:22:05 2015 From: dhallam at knology.net (David C. Hallam) Date: Sun, 08 Mar 2015 14:22:05 -0400 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <12BDBD83C5564E46A7E76D0F4241CB38@LILESJLAPTOP> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com><54FB7536.4090101@knology.net> <54FC50BB.8030704@knology.net> <12BDBD83C5564E46A7E76D0F4241CB38@LILESJLAPTOP> Message-ID: <54FC934D.6070503@knology.net> Jim, According to my old HP catalog; The 8553B RF section with the 8552B if section will cover from 1KHz to 110MHz. 8553B has two ranges 0-11MHZ and 0-110MHz The range of the 606B is given as 50KHz to 65MHz. The 8443A will only go down to 100KHz I have been looking for a 8556A which is the audio frequency RF unit at a price I can afford. They are relatively rare and expensive when they show up. I have used the storage function but it has been several years ago and really have forgotten how to use it. I have all the manuals so it wouldn't be hard to brush up on it. Although, I do seem to remember it was a touchy process because the trace wanted to bloom. I have restored several Johnson Invader transmitters and find the SA useful. David On 3/8/2015 12:29 PM, Jim Liles wrote: > Hi Dave, > First off Dave, I don?t see anything in the mix that will reach down > to 50Kc. Help me out on that one. Haven?t used that gear for years > and years. > I don't see anything in the mix that can do a sweep except maybe the > 8443A and 141T but I don?t think they make it down to 50Kc. > I believe the output of the tracking generator is a bit high for the > I.F.Sweep so will probably need an attenuator. You need to get down > to the millivolt levels for I.F. and microvolt levels for the front > end sweeps. What is its minimum output. > Been a long time since I used a 141T but as I recall it has a storage > CRT standard. Does the storage function in your 141 work and are you > familiar with its use? If the storage function works, you can do a > single manual sweep by simply turning the frequency knob on the SG > letting the 141 store the trace. > I have to admit I?ve never used a tracking generator, never needed to > do so. Most Spectrum analyzers have storage CRT or max hold > functions. What?s the difference? About 30 seconds of your time and > you can inject a precision signal of any amplitude, composition, or > purity. > Let us know if the storage function works and if you?re familiar with > it?s use. > The attached photos are of the SX-117 band pass .5Kc and 2.5Kc > settings. The 2.5Kc wave form looks to be only slightly wider than > the .5Kc because we doubled the sweep rate compressing the image. We > used an HP 3325A which uses a TTL transition for a matker. The down > transition is the 50Kc point. > The .5Kc trace is 250 cycles per graticule and the 2.5Kc trace is .5Kc > per graticule. > Kindest regards Jim K9AXN > -----Original Message----- > From: David C. Hallam > Sent: Sunday, March 08, 2015 8:38 AM > To: Jim Liles ; hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > Jim, > TEK 465 scope > HP 606B/8708A SG > HP 410C vtvm > HP 141T/8552B/8553B SA > HP 8443A tracking generator > HP 5246L FC > I also have an old EICO 369 sweep generator but I am not sure it is > working properly. > David > On 3/7/2015 10:06 PM, Jim Liles wrote: > > Dave, > > Tell us what equipment that you have available and we'll see what we > > can do to configure it to make it happen. Have you done any sweep > > analysis? > > Kindest regards Jim K9AXN > > -----Original Message----- > > From: David C. Hallam > > Sent: Saturday, March 07, 2015 4:01 PM > > To: hallicrafters at mailman.qth.net > > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > > Jim, > > What is the recommend procedure to sweep the the filter? I do not have > > a sweep generator but do have a good assortment of test equipment. > > David > > KW4DH > > On 3/7/2015 10:20 AM, Jim Liles wrote: > > > Hi Greg, > > > good assoermentr > > > Exactly! They were as good as film and legions better than > > ceramic. That?s why you still see paper defined on the schematics not > > ceramic caps. > > > > > > I still would replace the paper because as they dry out or begin to > > leak the Q goes to the devil. Won?t effect the .5Kc position because > > it doesn?t use them but when you use the higher band widths, > > especially the 1Kc, they will widen because of the denigration of the > > Q. May not be obvious but if you sweep that filter system it?s > > obvious. The band center skew jumps out at you when using the ceramic > > caps. > > > > > > In any case the paper at their worst will out perform ceramic unless > > they are shorted or open. > > > > > > One measure is, you should be able to tune in an SSB signal in the > > 5Kc position and dial right down through 1Kc and still clearly copy > > that conversation without touching the BFO and tuning to peak for > > clarity. The best definition that describes what you have to do when > > incorrect caps are installed is ?You have to be a human I.F. shift > > mechanism? You have to tune an SSB signal then tune slightly back and > > fourth for peak strength while adjusting the BFO for clarity. You > > don?t want to go there, let the radio do it for you. > > > > > > One thing that I didn?t mention is the 390 ohm resistor will be well > > above 420 ohms. Those resistors are very critical. Get it right on > > or 5% below not above or the 5Kc position will droop excessively. > > > > > > Kindest regards Jim K9AXN > > > > > > > > > > > > > > > > > > > > > > > > > > > ----- > > > No virus found in this message. > > > Checked by AVG - www.avg.com > > > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: > > 03/07/15 > > -- > > There are two possible outcomes: if the result confirms the > > hypothesis, then you've made a measurement. > > If the result is contrary to the hypothesis, then you've made a > discovery. > > Enrico Fermi > > ----- > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: > 03/07/15 > > ______________________________________________________________ > > Hallicrafters mailing list > > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > > ** For Assistance: dfischer at usol.com ** > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: > 03/07/15 > > > -- > There are two possible outcomes: if the result confirms the > hypothesis, then you've made a measurement. > If the result is contrary to the hypothesis, then you've made a discovery. > Enrico Fermi > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9253 - Release Date: 03/08/15 > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9253 - Release Date: 03/08/15 > -- There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery. Enrico Fermi ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9253 - Release Date: 03/08/15 From dhallam at knology.net Sun Mar 8 14:29:21 2015 From: dhallam at knology.net (David C. Hallam) Date: Sun, 08 Mar 2015 14:29:21 -0400 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com><54FB7536.4090101@knology.net> <54FC50BB.8030704@knology.net> Message-ID: <54FC9501.5090304@knology.net> Jim, The photos did come through. Not that it matters since the tracking generator will only go down to 100KHz, but the output attenuator will reduce the output to -120dBm David On 3/8/2015 2:07 PM, Jim Liles wrote: > Hi Dave, > > I sent a response with attached photos of a sweep of an SX-117 but it > failed. So I resent the narrative and will add the photos to the > K9AXN web site. > > First off Dave, I don?t see anything in the mix that will reach down > to 50Kc. Help me out on that one. Haven?t used that gear for years > and years. > > I don't see anything in the mix that can do a sweep except maybe the > 8443A and 141T but I don?t think they make it down to 50Kc. > > I believe the output of the tracking generator is a bit high for the > I.F.Sweep so will probably need an attenuator. You need to get down > to the millivolt levels for I.F. and microvolt levels for the front > end sweeps. What is its minimum output. > > Been a long time since I used a 141T but as I recall it has a storage > CRT standard. Does the storage function in your 141 work and are you > familiar with its use? If the storage function works, you can do a > single manual sweep by simply turning the frequency knob on the SG > letting the 141 store the trace. > > I have to admit I?ve never used a tracking generator, never needed to > do so. Most Spectrum analyzers have storage CRT or max hold > functions. What?s the difference? About 30 seconds of your time and > you can inject a precision signal of any amplitude, composition, or > purity. > > Let us know if the storage function works and if you?re familiar with > it?s use. > > The attached photos are of the SX-117 band pass .5Kc and 2.5Kc > settings. The 2.5Kc wave form looks to be only slightly wider than the > .5Kc because we doubled the sweep rate compressing the image. We used > an HP 3325A which uses a TTL transition for a matker. The down > transition is the 50Kc point. > > The .5Kc trace is 250 cycles per graticule and the 2.5Kc trace is .5Kc > per graticule. > > Kindest regards Jim K9AXN > > > > > -----Original Message----- From: David C. Hallam > Sent: Sunday, March 08, 2015 8:38 AM > To: Jim Liles ; hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > > Jim, > > TEK 465 scope > HP 606B/8708A SG > HP 410C vtvm > HP 141T/8552B/8553B SA > HP 8443A tracking generator > HP 5246L FC > > I also have an old EICO 369 sweep generator but I am not sure it is > working properly. > > David > > On 3/7/2015 10:06 PM, Jim Liles wrote: >> Dave, >> Tell us what equipment that you have available and we'll see what we >> can do to configure it to make it happen. Have you done any sweep >> analysis? >> Kindest regards Jim K9AXN >> -----Original Message----- >> From: David C. Hallam >> Sent: Saturday, March 07, 2015 4:01 PM >> To: hallicrafters at mailman.qth.net >> Subject: Re: [Hallicrafters] Black Beauty capacitors Beware >> Jim, >> What is the recommend procedure to sweep the the filter? I do not have >> a sweep generator but do have a good assortment of test equipment. >> David >> KW4DH >> On 3/7/2015 10:20 AM, Jim Liles wrote: >> > Hi Greg, >> > good assoermentr >> > Exactly! They were as good as film and legions better than >> ceramic. That?s why you still see paper defined on the schematics >> not ceramic caps. >> > >> > I still would replace the paper because as they dry out or begin to >> leak the Q goes to the devil. Won?t effect the .5Kc position because >> it doesn?t use them but when you use the higher band widths, >> especially the 1Kc, they will widen because of the denigration of the >> Q. May not be obvious but if you sweep that filter system it?s >> obvious. The band center skew jumps out at you when using the ceramic >> caps. >> > >> > In any case the paper at their worst will out perform ceramic unless >> they are shorted or open. >> > >> > One measure is, you should be able to tune in an SSB signal in the >> 5Kc position and dial right down through 1Kc and still clearly copy >> that conversation without touching the BFO and tuning to peak for >> clarity. The best definition that describes what you have to do when >> incorrect caps are installed is ?You have to be a human I.F. shift >> mechanism? You have to tune an SSB signal then tune slightly back and >> fourth for peak strength while adjusting the BFO for clarity. You >> don?t want to go there, let the radio do it for you. >> > >> > One thing that I didn?t mention is the 390 ohm resistor will be well >> above 420 ohms. Those resistors are very critical. Get it right on >> or 5% below not above or the 5Kc position will droop excessively. >> > >> > Kindest regards Jim K9AXN >> > >> > >> > >> > >> > >> > >> > >> > >> > ----- >> > No virus found in this message. >> > Checked by AVG - www.avg.com >> > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: >> 03/07/15 >> -- >> There are two possible outcomes: if the result confirms the >> hypothesis, then you've made a measurement. >> If the result is contrary to the hypothesis, then you've made a >> discovery. >> Enrico Fermi >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: >> 03/07/15 >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: >> 03/07/15 >> > -- There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery. Enrico Fermi ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9253 - Release Date: 03/08/15 From hallicrafterssr2000 at k9axn.com Sun Mar 8 14:30:16 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sun, 8 Mar 2015 13:30:16 -0500 Subject: [Hallicrafters] Black Beauty capacitors Beware In-Reply-To: <54FC50BB.8030704@knology.net> References: <9786041B209D46789363256BFF23F751@LILESJLAPTOP> <14bf496e334-5f09-6dfb@webprd-a08.mail.aol.com><54FB7536.4090101@knology.net> <54FC50BB.8030704@knology.net> Message-ID: <697E0980849B4EDAA00AB43E870AB197@LILESJLAPTOP> I added photos of a sweep analysis of the .5Kc and 2.5Kc selectivity settings on the SX-117. http://www.k9axn.com/_mgxroot/page_10876.html -----Original Message----- From: David C. Hallam Sent: Sunday, March 08, 2015 8:38 AM To: Jim Liles ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Black Beauty capacitors Beware Jim, TEK 465 scope HP 606B/8708A SG HP 410C vtvm HP 141T/8552B/8553B SA HP 8443A tracking generator HP 5246L FC I also have an old EICO 369 sweep generator but I am not sure it is working properly. David On 3/7/2015 10:06 PM, Jim Liles wrote: > Dave, > Tell us what equipment that you have available and we'll see what we > can do to configure it to make it happen. Have you done any sweep > analysis? > Kindest regards Jim K9AXN > -----Original Message----- > From: David C. Hallam > Sent: Saturday, March 07, 2015 4:01 PM > To: hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > Jim, > What is the recommend procedure to sweep the the filter? I do not have > a sweep generator but do have a good assortment of test equipment. > David > KW4DH > On 3/7/2015 10:20 AM, Jim Liles wrote: > > Hi Greg, > > good assoermentr > > Exactly! They were as good as film and legions better than > ceramic. That?s why you still see paper defined on the schematics not > ceramic caps. > > > > I still would replace the paper because as they dry out or begin to > leak the Q goes to the devil. Won?t effect the .5Kc position because > it doesn?t use them but when you use the higher band widths, > especially the 1Kc, they will widen because of the denigration of the > Q. May not be obvious but if you sweep that filter system it?s > obvious. The band center skew jumps out at you when using the ceramic > caps. > > > > In any case the paper at their worst will out perform ceramic unless > they are shorted or open. > > > > One measure is, you should be able to tune in an SSB signal in the > 5Kc position and dial right down through 1Kc and still clearly copy > that conversation without touching the BFO and tuning to peak for > clarity. The best definition that describes what you have to do when > incorrect caps are installed is ?You have to be a human I.F. shift > mechanism? You have to tune an SSB signal then tune slightly back and > fourth for peak strength while adjusting the BFO for clarity. You > don?t want to go there, let the radio do it for you. > > > > One thing that I didn?t mention is the 390 ohm resistor will be well > above 420 ohms. Those resistors are very critical. Get it right on > or 5% below not above or the 5Kc position will droop excessively. > > > > Kindest regards Jim K9AXN > > > > > > > > > > > > > > > > > > ----- > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: > 03/07/15 > -- > There are two possible outcomes: if the result confirms the > hypothesis, then you've made a measurement. > If the result is contrary to the hypothesis, then you've made a discovery. > Enrico Fermi > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9248 - Release Date: 03/07/15 > -- There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery. Enrico Fermi ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9253 - Release Date: 03/08/15 ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From hallicrafters at mailman.qth.net Sun Mar 8 16:00:20 2015 From: hallicrafters at mailman.qth.net (Chris Farley via Hallicrafters) Date: Sun, 8 Mar 2015 20:00:20 +0000 (UTC) Subject: [Hallicrafters] BBODs In-Reply-To: References: Message-ID: <140227113.870885.1425844820440.JavaMail.yahoo@mail.yahoo.com> I'll throw throw in one kick before the horse is buried..?? In lieu of the recent BBOD discussion, here's something I wrote up on the Collins reflector a year or so ago.? Enjoy, and let the bullets fly!: To venture into dangerous territory, I will step out on a limb and counter your blanket statement- Paper caps were _not_ all junk when new. Paper dielectric capacitors are still available to this day, (at a justifiably high price!) in both metalized and non-metalized (foil instead of film) configurations for use not only in hi-fi equipment who want that paper/foil cap "sound", (Let's not get into that discussion, please), but for motor run and other various industrial and commercial settings. These are oil wetted/filled and capable of withstanding higher voltage and dissipating more heat without degradation, than a poly(x)ene film or foil caps. I'm sure Bill and others have Collins transmitters from the 30's with paper dielectric capacitors that still test just fine in the capacitance AND leakage department, even at full rated voltage. The main problem with the molded paper Sprague "Black Beauty Telecaps" and so-called "Bumble Bee capacitors" (both referred to as BBOD, Black Beauties Of Death) is how well they are sealed- Contrary to popular belief, the genuine Sprague "Black Beauty Telecaps" were very high quality components in their time.? The? end seals on these caps are actuallyquite good- however the molded bakelite phenolic body by unintended design, is vulnerable to cracking which allows contaminating air and moisture (oober bad) inside, and allows the oil to vent out. Ever wonder why all 600+V (and some lower voltage) Black Beauty caps have what looks like a solder ball on one end? These caps were molded DRY. The end with the solder blob is actually a very small tube/eylet which allowed mineral oil insertion under high vacuum AFTER the capacitor was rolled and molded. A lead was then slid inside this tube, and soldered in place. By molding the capacitor dry and wetting the paper later, a much lower contamination level was able to be reached during the manufacturing process.? This is the same manor in which the much more expensive (and reliable) metal encased, glass "hermetically" sealed capacitors such as the Sprague "Vitamin Q" series were made. These caps are commonly found in the R-390A, and many other military radios from the mid 50's onward until plastic capacitors took over.? Of the ones I have removed, I have only tested ONE of these low value Vitamin Q caps to have under 500Mohm of leakage resistance, my "replacement threshold" being 200-500Mohm depending upon humidity, the phase of Mars, and just how lazy I'm feeling that day.? To the same point, I recently rebuilt a Detrola manufactured broadcast radio from about 1932 for a friend. The cabinet had been refinished so the goal was long term reliability, not originality- So all capacitors were replaced. For kicks, I decided to check out a few of the old "guaranteed to be junk" caps.? All but one of those paper decoupling/bypass capacitors were original to the set, and made by Solar. They were metal cans with rubber end seals, dipped in wax, and had a rolled paper covering. Guess what? EVERY SINGLE ONE tested within 10% of their stated value, and had leakage greater than 1000Mohm, most approaching infinity. This from "junk when new" paper capacitors that are (almost!) older than the eldest CCA member according to the recent informal survey. I hope I work as well as those caps at 82.... A counter to all said above, is a personal theory...? The paper used in these old capacitors may very well not be acid free- additionally it could vary in pH from batch to batch, manufacturer to manufacturer.? This could indeed present an age alone failure, as <7pH acidic paper breaks down (At what speed? Additionally at what speed when oil impregnated??) in addition to very possibly reacting with the high purity aluminum foil. If someone has scientific analysis equipment available to them, this would make for a VERY interesting study. Moral of the story, not all paper caps are junk... The "shotgun replace 'em all" approach does regrettably have it's place- But should never be an automatic requirement for every piece of vintage gear- It should be done on an individual basis. Odds are if a cap passes the "life test" and still measures very good after the first 50 years, it may very well outlast you. Regards, Chris kc9ieq From: Tom Dailey To: hallicrafters at mailman.qth.net Sent: Saturday, March 7, 2015 9:14 AM Subject: [Hallicrafters] BBODs BBODs - Black Beauties of Death -? have been discussed ad nauseum here, but point of fact is that they're BAD.? Period.? I've seen 'em split, DEAD-shorted, leaky, and every other thing.? You may not see immediate improvement, but not changing them will result in DEATH of many things; not the least being the B+ windings on your pwr xfmr.? Yes, there are many differences in caps, and the explanation by Jim, was spot on. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From magnuson at mac.com Sun Mar 8 18:59:31 2015 From: magnuson at mac.com (Waldo Magnuson) Date: Sun, 08 Mar 2015 15:59:31 -0700 Subject: [Hallicrafters] FS SX-28A Message-ID: <89E8167C-B73C-4149-B469-CD415D59129A@mac.com> For sale: My second Hallicrafters SX-28A. Capacitors (paper and electrolytic), some resistors, and power cord replaced. Capacitors in RF section not replaced. Aligned. Clean and works well. Cabinet is for a SX-42 but looks very nice. $200 plus shipping and shipping materials (est. $20). Pictures available for interested buyers. Thanks. 73 Skip Magnuson W7WGM Spokane, WA From hallicrafterssr2000 at k9axn.com Sun Mar 8 20:29:43 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sun, 8 Mar 2015 19:29:43 -0500 Subject: [Hallicrafters] BBODs In-Reply-To: <140227113.870885.1425844820440.JavaMail.yahoo@mail.yahoo.com> References: <140227113.870885.1425844820440.JavaMail.yahoo@mail.yahoo.com> Message-ID: <399741EAAFBA448DA27F83006EFE2C82@LILESJLAPTOP> Hi Chris, Thanks for the response and depth of the note. No bullets will fly. That?s for the reflectors that allow nut cases to poison them. Your point is well taken and has merit. I believe the conversation has been that the paper caps when new were better than Ceramic and had essentially the same positive attributes of the Polypropylene caps. The problem is that so many paper capacitors had failed; some taking other parts out with them. You have to admit that if you lump all of the paper caps of that era together you will see clearly a pattern of failure even though some are to this day just fine. Kinda like if 80% of the red cars have break failure you likely will feel that red Chevies, Fords, BMW?s, and any other red car is suspicious especially if they take out another car when they fail. My concern is that a person will acquire a treasure and decide to restore it turning the radio over, replacing all of the paper caps with ceramic; one of the great tragedies of radio. From a performance point of view, they would have been better off taking their chances with the paper. There?s an alternative, replace them with all Polypropylene. Now performance will be the same as with paper but they won?t fail. If I look at the statistical comparison of Paper or Polypropylene failure there cannot be any doubt that Polypropylene is 99.9 % safer. Now comes the great debate. Chris, it?s good and interesting to have these conversations regarding the mysteries of the technology. Do paper caps have some sort of property that sets them apart from all other capacitors where they develop a distinguishable difference in tone or quality for audio applications? I do believe some people can distinguish something because my wife can hear these 40Kc rabbit chasers. I brought one home last year to keep em out of the yard plugged it in outside came into the house and she said what the hell is that horrible noise I?m getting a migraine? Both collies were sitting there wondering what she was talking about. Went outside unplugged it and came in to my better half thanking me for turning it off. I asked her what it sounded like and she said ?I don?t know haven?t heard anything to compare it to?. There is some substance to what people are able to hear as well as they hear what they want to. Kind of confusing like ?Go tell your mother she wants you? Some years ago we tried an experiment to determine whether paper or ceramic caps made a difference in audio applications. We installed all ceramic caps in an audio amp in a recording studio owned by a retired audio engineer from Nashville and played a stored symphony track while recording it. Then we did the same after installing paper caps and yes it was difficult to find caps that passed muster. We played the two tracks through a mixer INVERTING one then synchronizing the tracks. Yep, all kinds of flack on this comparison. Then to Polyethylene capacitors. Synced them up with the paper track and it looked like there was nothing there. I find it very difficult to believe but do not discount the proposition that there is a distinguishable difference in audio performance between paper and film caps. I do believe some people are gifted and can actually hear the difference between Polyethylene and paper and I also believe some can hear exactly what they have come to believe they hear. Nothing said here is in any way meant to be offensive. I will always wonder about this enigma. Thanks again Chris --- these things stir a good deal of interest. Kindest regards Jim K9AXN -----Original Message----- From: Chris Farley via Hallicrafters Sent: Sunday, March 08, 2015 3:00 PM To: Hallicrafters Reflector Subject: Re: [Hallicrafters] BBODs I'll throw throw in one kick before the horse is buried.. In lieu of the recent BBOD discussion, here's something I wrote up on the Collins reflector a year or so ago. Enjoy, and let the bullets fly!: To venture into dangerous territory, I will step out on a limb and counter your blanket statement- Paper caps were _not_ all junk when new. Paper dielectric capacitors are still available to this day, (at a justifiably high price!) in both metalized and non-metalized (foil instead of film) configurations for use not only in hi-fi equipment who want that paper/foil cap "sound", (Let's not get into that discussion, please), but for motor run and other various industrial and commercial settings. These are oil wetted/filled and capable of withstanding higher voltage and dissipating more heat without degradation, than a poly(x)ene film or foil caps. I'm sure Bill and others have Collins transmitters from the 30's with paper dielectric capacitors that still test just fine in the capacitance AND leakage department, even at full rated voltage. The main problem with the molded paper Sprague "Black Beauty Telecaps" and so-called "Bumble Bee capacitors" (both referred to as BBOD, Black Beauties Of Death) is how well they are sealed- Contrary to popular belief, the genuine Sprague "Black Beauty Telecaps" were very high quality components in their time. The end seals on these caps are actuallyquite good- however the molded bakelite phenolic body by unintended design, is vulnerable to cracking which allows contaminating air and moisture (oober bad) inside, and allows the oil to vent out. Ever wonder why all 600+V (and some lower voltage) Black Beauty caps have what looks like a solder ball on one end? These caps were molded DRY. The end with the solder blob is actually a very small tube/eylet which allowed mineral oil insertion under high vacuum AFTER the capacitor was rolled and molded. A lead was then slid inside this tube, and soldered in place. By molding the capacitor dry and wetting the paper later, a much lower contamination level was able to be reached during the manufacturing process. This is the same manor in which the much more expensive (and reliable) metal encased, glass "hermetically" sealed capacitors such as the Sprague "Vitamin Q" series were made. These caps are commonly found in the R-390A, and many other military radios from the mid 50's onward until plastic capacitors took over. Of the ones I have removed, I have only tested ONE of these low value Vitamin Q caps to have under 500Mohm of leakage resistance, my "replacement threshold" being 200-500Mohm depending upon humidity, the phase of Mars, and just how lazy I'm feeling that day. To the same point, I recently rebuilt a Detrola manufactured broadcast radio from about 1932 for a friend. The cabinet had been refinished so the goal was long term reliability, not originality- So all capacitors were replaced. For kicks, I decided to check out a few of the old "guaranteed to be junk" caps. All but one of those paper decoupling/bypass capacitors were original to the set, and made by Solar. They were metal cans with rubber end seals, dipped in wax, and had a rolled paper covering. Guess what? EVERY SINGLE ONE tested within 10% of their stated value, and had leakage greater than 1000Mohm, most approaching infinity. This from "junk when new" paper capacitors that are (almost!) older than the eldest CCA member according to the recent informal survey. I hope I work as well as those caps at 82.... A counter to all said above, is a personal theory... The paper used in these old capacitors may very well not be acid free- additionally it could vary in pH from batch to batch, manufacturer to manufacturer. This could indeed present an age alone failure, as <7pH acidic paper breaks down (At what speed? Additionally at what speed when oil impregnated??) in addition to very possibly reacting with the high purity aluminum foil. If someone has scientific analysis equipment available to them, this would make for a VERY interesting study. Moral of the story, not all paper caps are junk... The "shotgun replace 'em all" approach does regrettably have it's place- But should never be an automatic requirement for every piece of vintage gear- It should be done on an individual basis. Odds are if a cap passes the "life test" and still measures very good after the first 50 years, it may very well outlast you. Regards, Chris kc9ieq From: Tom Dailey To: hallicrafters at mailman.qth.net Sent: Saturday, March 7, 2015 9:14 AM Subject: [Hallicrafters] BBODs BBODs - Black Beauties of Death - have been discussed ad nauseum here, but point of fact is that they're BAD. Period. I've seen 'em split, DEAD-shorted, leaky, and every other thing. You may not see immediate improvement, but not changing them will result in DEATH of many things; not the least being the B+ windings on your pwr xfmr. Yes, there are many differences in caps, and the explanation by Jim, was spot on. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From scr287 at att.net Mon Mar 9 14:36:59 2015 From: scr287 at att.net (Jack Antonio) Date: Mon, 09 Mar 2015 14:36:59 -0400 Subject: [Hallicrafters] S-76 questions Message-ID: <54FDE84B.3000305@att.net> I have a couple questions on an S-76 that followed me home last week, and am wondering if someone is willing to look inside theirs to answer them. This concerns the bracket that holds the two shafts for the tuning and bandspread knobs and the shaft for the intermediate bandspread pulley. On mine, it looks like the bracket is bent, and there is a missing "C" clip on the intermediate pulley shaft, and I'd like to find out if this is the way it is supposed to be, or not. There is probably a quarter inch of fore and aft play in that shaft. Is there supposed to be a spring washer on this shaft like the shafts for the knobs? Second, how much fore and aft play should there be in the shafts for the tuning and bandspread knobs? On mine, the two spring washers are flattened and essentially doing nothing. I came up with a short term fix, but am wondering how it was configured originally. It looks like someone attemped a dial restring in the past. The main dial cord is not "by the book" and the bandspread cord was stretched, brittle, and its tension spring was bent up. Thanks in advance Jack Antonio WA7DIA/4 From rayfrijr at msn.com Mon Mar 9 17:51:34 2015 From: rayfrijr at msn.com (RAY FRIESS) Date: Mon, 9 Mar 2015 15:51:34 -0600 Subject: [Hallicrafters] [Heathkit] 2015 NOVICE RIG ROUNDUP RESULTS! In-Reply-To: <3F39C1F8-90A3-415D-8B1D-D4AFC4F6C98D@cfl.rr.com> References: <54FDC277.3543.A632B6@bcarling.cfl.rr.com>, <001b01d05a8f$4d6767f0$e83637d0$@net>, <3F39C1F8-90A3-415D-8B1D-D4AFC4F6C98D@cfl.rr.com> Message-ID: where's the soapbox? would love to read it... > From: bcarling at cfl.rr.com > Date: Mon, 9 Mar 2015 14:00:12 -0400 > To: ckepus at comcast.net > CC: heathkit at mailman.qth.net; hallicrafters at mailman.qth.net; Ham-Radio at yahoogroups.com; Boatanchors at puck.nether.net; heath at puck.nether.net; heathkitnovicestations at yahoogroups.com; Hamradio at yahoogroups.com > Subject: Re: [Heathkit] 2015 NOVICE RIG ROUNDUP RESULTS! > > Chris, thank you so much for your encouraging remarks. I hope you can join us next year for sure and I also hope to work you in between times. > > Would it be permissible for me to post your remarks on the soapbox? > > Best regards - Brian Carling > AF4K Crystals Co. > 117 Sterling Pine St. > Sanford, FL 32773 > > Tel: +USA 321-262-5471 > > > > > > On Mar 9, 2015, at 1:34 PM, Chris Kepus wrote: > > > > Bry, I just finished reading your NRR Soapbox page. Man, what a fun read. > > I missed the NRR this year because of knee surgery during the same period. > > > > I won't miss next year. !! :-) > > > > The real purpose of this message, however, is to congratulate you and your > > co-conspirator(s) (please forward this message to them). I know what a > > daunting task it is to bring forward a new idea like NRR, establish format, > > rules, yadda, yadda, consistently hype and advertise it across many venues, > > execute it on time and on plan, and follow up appropriately. Didn't mean to > > overdo the above list...it is only to acknowledge and underscore the > > incredible effort needed to make this happen. > > > > You and your team did a great job. The Soapbox comments are truly > > indicative of the enjoyment this event generated and how it rekindled > > memories of the magic of one's first experiences in ham radio. > > > > 73, > > Chris > > W7JPG > > > > > ______________________________________________________________ > Heathkit mailing list > Home: http://mailman.qth.net/mailman/listinfo/heathkit > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Heathkit at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From rayfrijr at msn.com Tue Mar 10 12:59:51 2015 From: rayfrijr at msn.com (RAY FRIESS) Date: Tue, 10 Mar 2015 10:59:51 -0600 Subject: [Hallicrafters] [Heath] [Heathkit] 2015 NOVICE RIG ROUNDUP RESULTS! In-Reply-To: <9BA7E65D-1231-40C4-87EC-EBA018529114@cfl.rr.com> References: <54FDC277.3543.A632B6@bcarling.cfl.rr.com>, <001b01d05a8f$4d6767f0$e83637d0$@net>, <9BA7E65D-1231-40C4-87EC-EBA018529114@cfl.rr.com> Message-ID: Thats one thing that made being a novice so fun. Overcoming obstacles with the rig, antenna etc to make those contacts. Not like today where you buy a rice box solid state rig, throw up a monster beam and go for it. Nothing like the glow of the filaments and dial lamps, the big knobs and the can headphones to make it more exciting when some signal comes back to your cq. > From: bcarling at cfl.rr.com > Date: Tue, 10 Mar 2015 07:40:25 -0400 > To: ckepus at comcast.net > CC: heathkit at mailman.qth.net; hallicrafters at mailman.qth.net; Ham-Radio at yahoogroups.com; Boatanchors at puck.nether.net; heath at puck.nether.net; heathkitnovicestations at yahoogroups.com; Hamradio at yahoogroups.com > Subject: Re: [Heath] [Heathkit] 2015 NOVICE RIG ROUNDUP RESULTS! > > Hi Chris, > > It was a blast.... Reading the results amazed me too. The ingenuity and persistence of everyone! I was reminded of just how difficult it was sometimes as a novice to actually get on the air and make contacts! > > It was great fun and a good time was had by all - or at least a nostalgic experience for sure!! > > Best regards - Brian Carling > AF4K > > > On Mar 9, 2015, at 1:34 PM, Chris Kepus wrote: > > > > Bry, I just finished reading your NRR Soapbox page. Man, what a fun read. > > I missed the NRR this year because of knee surgery during the same period. > > > > I won't miss next year. !! :-) > > > > The real purpose of this message, however, is to congratulate you and your > > co-conspirator(s) (please forward this message to them). I know what a > > daunting task it is to bring forward a new idea like NRR, establish format, > > rules, yadda, yadda, consistently hype and advertise it across many venues, > > execute it on time and on plan, and follow up appropriately. Didn't mean to > > overdo the above list...it is only to acknowledge and underscore the > > incredible effort needed to make this happen. > > > > You and your team did a great job. The Soapbox comments are truly > > indicative of the enjoyment this event generated and how it rekindled > > memories of the magic of one's first experiences in ham radio. > > > > 73, > > Chris > > W7JPG > > > > > _______________________________________________ > Heath mailing list > Heath at puck.nether.net > https://puck.nether.net/mailman/listinfo/heath From mark.k3msb at gmail.com Tue Mar 10 13:23:49 2015 From: mark.k3msb at gmail.com (Mark K3MSB) Date: Tue, 10 Mar 2015 13:23:49 -0400 Subject: [Hallicrafters] [Heathkit] 2015 NOVICE RIG ROUNDUP RESULTS! In-Reply-To: <9BA7E65D-1231-40C4-87EC-EBA018529114@cfl.rr.com> References: <54FDC277.3543.A632B6@bcarling.cfl.rr.com> <001b01d05a8f$4d6767f0$e83637d0$@net> <9BA7E65D-1231-40C4-87EC-EBA018529114@cfl.rr.com> Message-ID: Hi Brian I only made 3 contacts as I didn't have a lot of time but it was fun. 73 Mark K3MSB Sent from my Android phone On Mar 10, 2015 7:40 AM, "Brian Carling" wrote: > Hi Chris, > > It was a blast.... Reading the results amazed me too. The ingenuity and > persistence of everyone! I was reminded of just how difficult it was > sometimes as a novice to actually get on the air and make contacts! > > It was great fun and a good time was had by all - or at least a nostalgic > experience for sure!! > > Best regards - Brian Carling > AF4K > > > On Mar 9, 2015, at 1:34 PM, Chris Kepus wrote: > > > > Bry, I just finished reading your NRR Soapbox page. Man, what a fun > read. > > I missed the NRR this year because of knee surgery during the same > period. > > > > I won't miss next year. !! :-) > > > > The real purpose of this message, however, is to congratulate you and > your > > co-conspirator(s) (please forward this message to them). I know what a > > daunting task it is to bring forward a new idea like NRR, establish > format, > > rules, yadda, yadda, consistently hype and advertise it across many > venues, > > execute it on time and on plan, and follow up appropriately. Didn't > mean to > > overdo the above list...it is only to acknowledge and underscore the > > incredible effort needed to make this happen. > > > > You and your team did a great job. The Soapbox comments are truly > > indicative of the enjoyment this event generated and how it rekindled > > memories of the magic of one's first experiences in ham radio. > > > > 73, > > Chris > > W7JPG > > > > > ______________________________________________________________ > Heathkit mailing list > Home: http://mailman.qth.net/mailman/listinfo/heathkit > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Heathkit at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > From hallicrafters at mailman.qth.net Tue Mar 10 14:29:00 2015 From: hallicrafters at mailman.qth.net (ron via Hallicrafters) Date: Tue, 10 Mar 2015 14:29:00 -0400 Subject: [Hallicrafters] Testing caps In-Reply-To: <54FB5E66.90509@roadrunner.com> Message-ID: <14c04f273d5-a91-1fda1@webprd-m57.mail.aol.com> There have been a lot of excellent replies here, even though I admit I've not read them all, yet. Please allow me to flog the dying equine one more time... FWIW I've been collecting boatanchor radios and test equipment for most of my 50 years in Ham Radio..... I have a LOT of both. For example, I currently have 19 o'scopes, dozens of signal generators, you get my point. I have replaced thousands of caps in my career. I wait until I have a small bucket full, then toss them. Although there is a HUGE market for BBODs on eBay!!! >From MY experience, one needs 3 pieces of not very expensive capacitor testing instruments to cover the possibilities. Frist, let me state in all these years, I have found exactly TWO bad disk caps. One was broken by a previous ham-fisted owner and the other was internally shorted. I have NEVER found a defective 'dogbone' cap. My Collins 51J-3 is full of these and is still working 100% and never been touched. 1. Inexpensive DVM style cap VALUE tester. I have several and also a NIST Traceable LCR Bridge. These usually run off a 9V battery. As stated, they will indicate the value of a cap (great for variables), but tell you nothing about 'leakage'. 2. ESR meter for electrolytic types. I have several but am kinda biased toward my Peak (brand). Not only will it automatically discharge an electrolytic cap and give you it's VALUE, it will also tell you it's ESR. 3. High Voltage Leakage Tester. This is absolutely necessary for testing coupling / bypass caps, typically .01 or .1 UF. I have a collection of these, such as TO-6A, TO-5, ZM11/U, on and on. Honestly, on my main test bench, I use an old Heathkit IM-11 (cap checker) that it's only function is it's nice adjustable HVPS. This is used in conjunction with an old VTVM. You can't use this method for electrolytics since if good, they ALL leak..... Here's a perfect example of testing the caps in my SX-101A or my 75A-4....... Disconnect one end of the BBOD or 'bumblebee' cap and put on a VALUE tester. Almost guaranteed it will measure it's exact, rated VALUE. OK, now put 400 or 600 VDC (whatever it's rated at) by connecting the LEAKAGE tester. Usually they will leak 500+ VDC with 600 VDC applied. OK, I admit it might not make a huge difference on a bypass or decoupling cap, but think what that HVDC is doing to the next stage when it's connected from Plate to Grid..... On my 75A-4 and SX-101A, I did one cap at a time and noticed the slow improvement as I progressed. Every single 'black cap' in both radios leaked horribly. In the 75A-4, I also found a leaky Mica cap which is not that unusual. Now, I just replace all the usual suspects and test every Mica I come across. Thanks fer listening... ron N4UE -----Original Message----- From: Roger D Johnson To: Jim Liles Cc: hallicrafters Sent: Sat, Mar 7, 2015 3:24 pm Subject: Re: [Hallicrafters] Black Beauty capacitors Beware It seem to be throughout the lines. S-76, SX-96, SX-100, etc. On 3/7/2015 2:45 PM, Jim Liles wrote: > Hi Roger, > > What model? > > Kindest regards Jim K9AXN > > -----Original Message----- From: Roger D Johnson > Sent: Saturday, March 07, 2015 1:08 PM > To: hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > > The cold ends of the first set are at RF ground due to a bypass cap. I just > can't figure out why Halli > would put B+ on one set of caps and not on the other! > > On 3/7/2015 2:05 PM, Roger D Johnson wrote: >> I've just noticed something strange about these IF strips that I hadn't seen >> before. The first set of >> capacitors on the selectivity switch have the cold ends connected to B+ while >> the second set has >> the cold ends grounded. Anyone know why Hallicrafters did this? >> >> 73, Roger >> >> >> >> >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From 1oldlens1 at ix.netcom.com Tue Mar 10 16:23:05 2015 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Tue, 10 Mar 2015 13:23:05 -0700 Subject: [Hallicrafters] Testing caps In-Reply-To: <14c04f273d5-a91-1fda1@webprd-m57.mail.aol.com> References: <14c04f273d5-a91-1fda1@webprd-m57.mail.aol.com> Message-ID: <54FF52A9.10200@ix.netcom.com> I generally agree with all this but differ in the value of a leakage tester for elecrolytics and the value of ESR or dissipation factor measurement on all caps. Paper caps like the BBOD can have accurate value but high ESR as well as leakage, you really have to test for both. Electrolytics all have leakage due to the kind of dielectric but there is a limit beyond which it is too high. Many capacitor checkers will indicate this on the meter. You must be patient with high value electrolytics because they take a while to charge and the leakage indication will be high until they are mostly charged. I have several alternatives for testing but I have an old Eico cap checker that does the job most of the time. For precise measurements of value and dissipation factor I use a General Radio impedance bridge. I also have a General Radio megohm meter which will show up leakage in all kinds of capacitors that will tolerate its test voltage. I've also found that my Hewlett-Packard 410-B gives a pretty good indication of leakage using the ohm meter function without subjecting the cap to very high voltage but the voltage is necessary for electrolytics to get a valid measurement. BB caps were used in a lot of places beside Hammarlund SP-600 receivers. For instance Hewlett-Packard 400 series AC VTVMs are full of them but I've never seen a cracked or leaky one where the SP-600 has lots of them. I don't know what the difference is but suspect the heat of soldering may be a factor. The BB was sold as a high quality, long life cap. The originals (there was a second series) were oil filled. The filling was done by means of a tube in one end which was sealed by soldering one of the leads to it. I think that the seal was often compromised by the application of too much heat when they were installed. however, I don't know how this affects the cracked and broken cases. I've also found that the windings in BB's are usually distorted. I thought perhaps they were squeezed to adjust the value but I wonder. I've seen similar distorted windings in other brands of plastic cased paper caps. However, I've also dissected some Micamold and Solar flat paper caps, the kind that look like mica caps. They all had high ESR and were leaky but the windings were perfect. On 3/10/2015 11:29 AM, ron via Hallicrafters wrote: > There have been a lot of excellent replies here, even though I admit I've not read them all, yet. > > Please allow me to flog the dying equine one more time... FWIW > > I've been collecting boatanchor radios and test equipment for most of my 50 years in Ham Radio..... I have a LOT of both. > For example, I currently have 19 o'scopes, dozens of signal generators, you get my point. > > I have replaced thousands of caps in my career. I wait until I have a small bucket full, then toss them. Although there is a HUGE market for BBODs on eBay!!! > >From MY experience, one needs 3 pieces of not very expensive capacitor testing instruments to cover the possibilities. > > Frist, let me state in all these years, I have found exactly TWO bad disk caps. One was broken by a previous ham-fisted owner and the other was internally shorted. I have NEVER found a defective 'dogbone' cap. My Collins 51J-3 is full of these and is still working 100% and never been touched. > > 1. Inexpensive DVM style cap VALUE tester. I have several and also a NIST Traceable LCR Bridge. These usually run off a 9V battery. As stated, they will indicate the value of a cap (great for variables), but tell you nothing about 'leakage'. > > 2. ESR meter for electrolytic types. I have several but am kinda biased toward my Peak (brand). Not only will it automatically discharge an electrolytic cap and give you it's VALUE, it will also tell you it's ESR. > > 3. High Voltage Leakage Tester. This is absolutely necessary for testing coupling / bypass caps, typically .01 or .1 UF. I have a collection of these, such as TO-6A, TO-5, ZM11/U, on and on. Honestly, on my main test bench, I use an old Heathkit IM-11 (cap checker) that it's only function is it's nice adjustable HVPS. This is used in conjunction with an old VTVM. You can't use this method for electrolytics since if good, they ALL leak..... > > Here's a perfect example of testing the caps in my SX-101A or my 75A-4....... > > Disconnect one end of the BBOD or 'bumblebee' cap and put on a VALUE tester. Almost guaranteed it will measure it's exact, rated VALUE. > OK, now put 400 or 600 VDC (whatever it's rated at) by connecting the LEAKAGE tester. Usually they will leak 500+ VDC with 600 VDC applied. > OK, I admit it might not make a huge difference on a bypass or decoupling cap, but think what that HVDC is doing to the next stage when it's connected from Plate to Grid..... > > On my 75A-4 and SX-101A, I did one cap at a time and noticed the slow improvement as I progressed. Every single 'black cap' in both radios leaked horribly. In the 75A-4, I also found a leaky Mica cap which is not that unusual. Now, I just replace all the usual suspects and test every Mica I come across. > > Thanks fer listening... > > ron > N4UE > > > > > > > > -----Original Message----- > From: Roger D Johnson > To: Jim Liles > Cc: hallicrafters > Sent: Sat, Mar 7, 2015 3:24 pm > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware > > > It seem to be throughout the lines. S-76, SX-96, SX-100, etc. > > On 3/7/2015 > 2:45 PM, Jim Liles wrote: >> Hi Roger, >> >> What model? >> >> Kindest regards > Jim K9AXN >> -----Original Message----- From: Roger D Johnson >> Sent: > Saturday, March 07, 2015 1:08 PM >> To: hallicrafters at mailman.qth.net >> > Subject: Re: [Hallicrafters] Black Beauty capacitors Beware >> The cold ends > of the first set are at RF ground due to a bypass cap. I just >> can't figure > out why Halli >> would put B+ on one set of caps and not on the other! >> >> On > 3/7/2015 2:05 PM, Roger D Johnson wrote: >>> I've just noticed something strange > about these IF strips that I hadn't seen >>> before. The first set of >>> > capacitors on the selectivity switch have the cold ends connected to B+ while > >>> the second set has >>> the cold ends grounded. Anyone know why > Hallicrafters did this? >>> 73, Roger >>> >>> >>> >>> >>> > ______________________________________________________________ >>> Hallicrafters > mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >>> > Help: http://mailman.qth.net/mmfaq.htm >>> Post: > mailto:Hallicrafters at mailman.qth.net >>> List Administrator: Duane Fischer, > W8DBF >>> ** For Assistance: dfischer at usol.com ** >>> >>> >>> This list > hosted by: http://www.qsl.net >>> Please help support this email list: > http://www.qsl.net/donate.html > ______________________________________________________________ >> Hallicrafters > mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> > Help: http://mailman.qth.net/mmfaq.htm >> Post: > mailto:Hallicrafters at mailman.qth.net >> List Administrator: Duane Fischer, > W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted > by: http://www.qsl.net >> Please help support this email list: > http://www.qsl.net/donate.html > ______________________________________________________________ >> Hallicrafters > mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> > Help: http://mailman.qth.net/mmfaq.htm >> Post: > mailto:Hallicrafters at mailman.qth.net >> List Administrator: Duane Fischer, > W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted > by: http://www.qsl.net >> Please help support this email list: > http://www.qsl.net/donate.html > ______________________________________________________________ > Hallicrafters > mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: > http://mailman.qth.net/mmfaq.htm > Post: > mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, > W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: > http://www.qsl.net > Please help support this email list: > http://www.qsl.net/donate.html > > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL From hallicrafterssr2000 at k9axn.com Tue Mar 10 21:16:23 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Tue, 10 Mar 2015 20:16:23 -0500 Subject: [Hallicrafters] Low power output on some bands on HT-32 Message-ID: Good evening Pat, Do believe we have a fix for your malady. It wreaks of a common problem dating back 40 years and seemed to molest most radios. Take a look at ---- http://www.k9axn.com/_mgxroot/page_10875.html It describes your symptoms and also the fix. It is written toward the SR-400 and SR-2000 but it is an almost universal problem with vintage radios. It?s called a Chassis Loop which happens almost anywhere in these radios. When we restore a radio every ground is tested and every chassis screw is removed dabbed with copper butter and reinserted. Prevents 90% of the squirrely problems that will plague you later. This problem causes the 12BY7A to turn from an amplifier to an oscillator and your tubes will go red because the 12BY7A is oscillating at a frequency close to the tuned circuit that is supposed to control it --- full drive even with the drive set to ?0?. Usually happens while tuning the pre selector. Earlier I suggested that only the bias not the plate or screen voltage would cause this malady. Of the plate, screen, or bias, that is true unless you radically exceed tube limits. One other thing to look at if you plan to buy tubes for your transmitter. The following note is written specifically for the 8122 but toward the end it segues to the 6146, 6KD6, and 6HF5. It actually speaks to any tube you might use. They all have the same issues. Somewhat explains why you can test a tube and have super emissions yet perform poorly in your radio and generally be less stable. http://www.k9axn.com/_mgxroot/page_10868.html If you feel that we?re doing a core dump, yep we?re trying to translate hand written notes from 40+ years ago into readable material that anyone can use. It?s getting difficult to find people who will work on these great place holders of a great era. Hope you find it interesting. Kindest regards Jim K9AXN ------Original Message----- From: ciferripatrick at yahoo.com [HallicraftersRadios] Sent: Monday, March 09, 2015 9:16 PM To: HallicraftersRadios at yahoogroups.com Subject: [Something New From Your Hallicrafters Reflector] Re: Low power output on some bands on HT-32 Hi Jim, Thanks very much for the response. It appears that my fix of inserting a resistor to lower the 6146 screen voltages to near the 205 volts shown in the manual wasn't the way to go after all. Doing that lowered the output on some bands by 20 watts. I'll do as you've suggested to isolate the problem. First though, I would like to buy a new pair of finals since the ones I have are all very used and have seen a lot of very red plates while trying to fix that original problem. Could you recommend a supplier I can contact to get some new ones? Thanks again, Pat (WA2P) From hallicrafterssr2000 at k9axn.com Wed Mar 11 11:41:18 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Wed, 11 Mar 2015 10:41:18 -0500 Subject: [Hallicrafters] SR-400 SR-2000 SR-150 audio sound like a train wreck? Message-ID: If you feel that your SR-2000, SR-400/ SR400A, or SR150 audio is distorted, have a difficult time tuning an SSB signal, or CW sounds like a break pad has reached EOL, click on the following link. Says it all. Note: The spectrum analyzer photos are shot with the video and bandwidth set to 10 cycles. Any wider, it will appear that nothing is wrong --- will look like a nice undistorted sine wave. Make sure you set your analyzer to the narrowest setting possible. http://www.k9axn.com/_mgxroot/page_10866.html Kindest regards Jim K9AXN From ncgilder at tesco.net Wed Mar 11 14:32:01 2015 From: ncgilder at tesco.net (Nick) Date: Wed, 11 Mar 2015 18:32:01 +0000 Subject: [Hallicrafters] Hallicrafters S27 clarification of models Message-ID: <1426098721.3117.10.camel@main-computer> Hello all Being a fairly recent convert to Hallicrafters I would be grateful if some could clarify the differences between the S27 models. I have recently acquired an S27A (I think), the B version seem very similar but with different coverage. The C on the other hand looks quite different, and I've also seen reference to a D version. So any pointers would be most welcome Many thanks Nick From hallicrafterssr2000 at k9axn.com Thu Mar 12 17:57:09 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Thu, 12 Mar 2015 16:57:09 -0500 Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma Message-ID: The following information will help to understand why vacuum tubes behave as they do. We focus on the 8122 used in Class AB1 service as well as just about any tube used under Class parameters. What you?ll find is tubes like the 6146, 6HF5, 6KD6, and others have the same frailties and strengths as the 8122. If you are restoring or servicing any vintage transmitter or transceiver you will find the following link to be interesting and it will save you a good deal of grief. If nothing else, it will help to understand the idiosyncrasy's and some times bizarre behavior of these tubes and how to cope with them. http://k9axn.com/_mgxroot/page_10868.html If it is unclear please send a note so we can correct the language. Kindest regards Jim K9AXN From hallicrafters at mailman.qth.net Sat Mar 14 11:49:01 2015 From: hallicrafters at mailman.qth.net (Lee via Hallicrafters) Date: Sat, 14 Mar 2015 11:49:01 -0400 Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma In-Reply-To: References: Message-ID: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> Jim, (or anyone) I am going to put in the ALC mod in the HT-32B soon.... The article calls for 1N34A diodes.... I have some: 1N4001 1N4002 1N4004 1N4005 1N4007 1N914 1N459A 1N270 Will any of these work OK? 73, Lee -----Original Message----- From: Jim Liles To: hallicrafters Sent: Thu, Mar 12, 2015 5:57 pm Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma The following information will help to understand why vacuum tubes behave as they do. We focus on the 8122 used in Class AB1 service as well as just about any tube used under Class parameters. What you?ll find is tubes like the 6146, 6HF5, 6KD6, and others have the same frailties and strengths as the 8122. If you are restoring or servicing any vintage transmitter or transceiver you will find the following link to be interesting and it will save you a good deal of grief. If nothing else, it will help to understand the idiosyncrasy's and some times bizarre behavior of these tubes and how to cope with them. http://k9axn.com/_mgxroot/page_10868.html If it is unclear please send a note so we can correct the language. Kindest regards Jim K9AXN ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From hallicrafters at mailman.qth.net Sat Mar 14 11:51:15 2015 From: hallicrafters at mailman.qth.net (Lee via Hallicrafters) Date: Sat, 14 Mar 2015 11:51:15 -0400 Subject: [Hallicrafters] HT-32B ALC mod DIODES?? Message-ID: <14c18fb78b0-604a-6b5b@webprd-a88.mail.aol.com> I am going to put in the ALC mod in the HT-32B soon.... The article calls for 1N34A diodes.... I have some: 1N4001 1N4002 1N4004 1N4005 1N4007 1N914 1N459A 1N270 Will any of these work OK? 73, Lee From hallicrafterssr2000 at k9axn.com Sat Mar 14 12:29:25 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sat, 14 Mar 2015 11:29:25 -0500 Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma In-Reply-To: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> References: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> Message-ID: <3D7495A530FF4D0CBCE1F2D1E86941A8@LILESJLAPTOP> Hi Lee, The 1N270 is a perfect replacement. It simply has a lot less leakage and higher reverse voltage tolerance. The 1N914 is also a good one. The 1N400X are silicone rectifiers for power supplies and the 1N459A is silicone for RF use --- use em to replace 1N456 in Hal products. Good luck with the HT-32B Kindest regards Jim K9AXN -----Original Message----- From: Lee via Hallicrafters Sent: Saturday, March 14, 2015 10:49 AM To: hallicrafterssr2000 at k9axn.com ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma Jim, (or anyone) I am going to put in the ALC mod in the HT-32B soon.... The article calls for 1N34A diodes.... I have some: 1N4001 1N4002 1N4004 1N4005 1N4007 1N914 1N459A 1N270 Will any of these work OK? 73, Lee -----Original Message----- From: Jim Liles To: hallicrafters Sent: Thu, Mar 12, 2015 5:57 pm Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma The following information will help to understand why vacuum tubes behave as they do. We focus on the 8122 used in Class AB1 service as well as just about any tube used under Class parameters. What you?ll find is tubes like the 6146, 6HF5, 6KD6, and others have the same frailties and strengths as the 8122. If you are restoring or servicing any vintage transmitter or transceiver you will find the following link to be interesting and it will save you a good deal of grief. If nothing else, it will help to understand the idiosyncrasy's and some times bizarre behavior of these tubes and how to cope with them. http://k9axn.com/_mgxroot/page_10868.html If it is unclear please send a note so we can correct the language. Kindest regards Jim K9AXN ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From pincon at erols.com Sat Mar 14 12:48:31 2015 From: pincon at erols.com (Charlie T, K3ICH) Date: Sat, 14 Mar 2015 12:48:31 -0400 Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma References: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> Message-ID: The 1N4000's are silicon power diodes. I believe the 1N459 might be a Zener. The1N914's would work OK since it is a signal diode. . The 1N270's are also signal diodes but are Germanium and are electrically closest to the original 1N34's I'd recommend the 1N914's though 73 Charlie k3ICH ----- Original Message ----- From: "Lee via Hallicrafters" To: ; Sent: Saturday, March 14, 2015 11:49 AM Subject: Re: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma > > Jim, (or anyone) > I am going to put in the ALC mod in the HT-32B soon.... > The article calls for 1N34A diodes.... > > I have some: > 1N4001 > 1N4002 > 1N4004 > 1N4005 > 1N4007 > > 1N914 > > 1N459A > 1N270 > > Will any of these work OK? > > 73, > Lee > > > > > > > -----Original Message----- > From: Jim Liles > To: hallicrafters > Sent: Thu, Mar 12, 2015 5:57 pm > Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma > > > The following information will help to understand why vacuum tubes behave > as > they do. We focus on the 8122 used in Class AB1 service as well as just > about > any tube used under Class parameters. What you?ll find is tubes like the > 6146, > 6HF5, 6KD6, and others have the same frailties and strengths as the 8122. > > If > you are restoring or servicing any vintage transmitter or transceiver you > will > find the following link to be interesting and it will save you a good deal > of > grief. If nothing else, it will help to understand the idiosyncrasy's and > some > times bizarre behavior of these tubes and how to cope with them. > > > http://k9axn.com/_mgxroot/page_10868.html > > If it is unclear please send a note > so we can correct the language. > > Kindest regards Jim > K9AXN > > ______________________________________________________________ > Hallicrafters > mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: > http://mailman.qth.net/mmfaq.htm > Post: > mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, > W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: > http://www.qsl.net > Please help support this email list: > http://www.qsl.net/donate.html > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From olaf at carolina.rr.com Sat Mar 14 12:58:53 2015 From: olaf at carolina.rr.com (Olaf Madsen) Date: Sat, 14 Mar 2015 12:58:53 -0400 Subject: [Hallicrafters] By-Pass Caps-Capacitance Value. Message-ID: Fellow ''Boatanchorites''', I have ''re-capped'' dozens of ''Boatanchors''--SX-62,SX-28, SX-101.etc. -- also Collins and National Radios.and replaced the old Paper and Wax and ''Black Beauties'' types (which the Audiophiles love so much,hi) ---some of the radios have 20 plus of these old caps that need to be replaced. All of them are using ''By-Pass'' Capacitors for the Screengrid (G2) the Cathode and various other areas with Capacitor Values of .01uF or ..02 to .05uF.----they are used in RF as well as in IF and Audio stages.----- WHAT DETERMINDS THEIR CAPASITANCE VALUE ???----I am sure it is not very critical,but is it done only because''evrybody'' has done it in the past and it works,or what .hi.??? I have a bunch of the new ,small ,yellow Metal/Film caps with values of .0062uF and .0068uF as well as some Disc/Ceramics of .003 uF value which I like to put to use. Tnx for the input which I always receive from this group.----73 de Olaf,KF4TP-- From duvallddennis at gmail.com Sat Mar 14 13:45:59 2015 From: duvallddennis at gmail.com (Dennis DuVall) Date: Sat, 14 Mar 2015 10:45:59 -0700 Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma In-Reply-To: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> References: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> Message-ID: Practically speaking any of the units listed would probably "work" here. The 1N400X units and the 1N459 would just have much higher reverse voltage ratings than you would need. Dennis D, W7QHO Glendale, CA ****************** On Mar 14, 2015, at 8:49 AM, Lee via Hallicrafters wrote: > > Jim, (or anyone) > I am going to put in the ALC mod in the HT-32B soon.... > The article calls for 1N34A diodes.... > > I have some: > 1N4001 > 1N4002 > 1N4004 > 1N4005 > 1N4007 > > 1N914 > > 1N459A > 1N270 > > Will any of these work OK? > > 73, > Lee > > > From k9sth at sbcglobal.net Sat Mar 14 18:28:17 2015 From: k9sth at sbcglobal.net (Glen Zook) Date: Sat, 14 Mar 2015 15:28:17 -0700 Subject: [Hallicrafters] HT-32B ALC mod DIODES?? In-Reply-To: <14c18fb78b0-604a-6b5b@webprd-a88.mail.aol.com> References: <14c18fb78b0-604a-6b5b@webprd-a88.mail.aol.com> Message-ID: <1426372097.26754.YahooMailNeo@web181305.mail.ne1.yahoo.com> The 1N34A is germanium and the 1N270 is germanium. The rest of the diodes are silicon and are primarily power diodes. Given the choice, it is a "no brainer", use the 1N270. Glen, K9STH website: http://k9sth.net On Saturday, March 14, 2015 10:51 AM, Lee via Hallicrafters wrote: I am going to put in the ALC mod in the HT-32B soon.... The article calls for 1N34A diodes.... I have some: 1N4001 1N4002 1N4004 1N4005 1N4007 1N914 1N459A 1N270 Will any of these work OK? 73, Lee ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From duvallddennis at gmail.com Sat Mar 14 19:44:06 2015 From: duvallddennis at gmail.com (Dennis DuVall) Date: Sat, 14 Mar 2015 16:44:06 -0700 Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma In-Reply-To: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> References: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> Message-ID: Used a lot of 1N459s in vacuum tube logic and FF triggering circuits back in the late 50's. It's 200V PIV rating was a high figure for that time. Dennis DuVall, w7qho Glendale, CA ********************** On Mar 14, 2015, at 8:49 AM, Lee via Hallicrafters wrote: > > Jim, (or anyone) > I am going to put in the ALC mod in the HT-32B soon.... > The article calls for 1N34A diodes.... > > I have some: > 1N4001 > 1N4002 > 1N4004 > 1N4005 > 1N4007 > > 1N914 > > 1N459A > 1N270 > > Will any of these work OK? > > 73, > Lee > From jeff at podengo.com Sat Mar 14 21:31:30 2015 From: jeff at podengo.com (Jeff) Date: Sat, 14 Mar 2015 21:31:30 -0400 Subject: [Hallicrafters] S-20R Small Knob Message-ID: <5504E0F2.80207@podengo.com> Does anyone have the SMALL knob for the S-20R? I'm tired of people ninja-ing them out from underneath me on eBay. Just need one. I think it is similar to many radios of the same era. Thanks for looking. Jeff WB3JIH From hallicrafters at mailman.qth.net Sun Mar 15 00:15:36 2015 From: hallicrafters at mailman.qth.net (Jammer via Hallicrafters) Date: Sun, 15 Mar 2015 00:15:36 -0400 Subject: [Hallicrafters] Halli SX-62A etc refurbishment In-Reply-To: References: Message-ID: <14c1ba4ee87-6462-852d@webprd-m31.mail.aol.com> Olaf's post reminded me I had a few undone projects. With eyes getting old(er) I think I need to find a local (Chicago metro?!) person to work on a 62A that's been dormant for awhile, as well as a Hickock TV3. Any and all leads are appreciated. Thanks! 73 Terry KC9KEL From k9dtc at comcast.net Mon Mar 16 10:07:05 2015 From: k9dtc at comcast.net (Dan Cotsirilos) Date: Mon, 16 Mar 2015 09:07:05 -0500 Subject: [Hallicrafters] FOR SALE R-46 SPEAKER In-Reply-To: References: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> Message-ID: It is in pretty good shape. it has the transformer. $50 plus shipping Dan K9DTC From w6zkh at att.net Mon Mar 16 10:58:11 2015 From: w6zkh at att.net (John Neeley) Date: Mon, 16 Mar 2015 07:58:11 -0700 Subject: [Hallicrafters] FOR SALE R-46 SPEAKER In-Reply-To: References: <14c18f96c94-604a-6b2a@webprd-a88.mail.aol.com> Message-ID: <1426517891.95463.YahooMailNeo@web184806.mail.gq1.yahoo.com> Hey Dan, today is the day that the HT-32 power transformer I got from you gets wired in.... wish me luck, hi. John W6ZKH On Monday, March 16, 2015 7:07 AM, Dan Cotsirilos wrote: It is in pretty good shape. it has the transformer. $50 plus shipping Dan K9DTC ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From duvallddennis at gmail.com Tue Mar 17 19:57:06 2015 From: duvallddennis at gmail.com (Dennis DuVall) Date: Tue, 17 Mar 2015 16:57:06 -0700 Subject: [Hallicrafters] Hallicrafters S Meter Available Message-ID: <97538281-B16B-40FA-AD1C-02668FDF562D@gnail.com> Three inch meter, metal case, sealed. Says "CARRIER INDICATOR" and "the hallicrafters inc." on the front. Scale up to S9 and then DB over S9. Red " 0" marker halfway up the "DB over S9" scale labeled "FM tune to zero" The pointer rests on the "FM tune to zero" marker. Appears to be NOS, no solder on the rear terminals. Somebody gotta be desperately looking for one of these..... Dennis D, W7QHO Glendale, CA From hallicrafters at mailman.qth.net Wed Mar 18 05:48:32 2015 From: hallicrafters at mailman.qth.net (Asif Khan via Hallicrafters) Date: Wed, 18 Mar 2015 05:48:32 -0400 Subject: [Hallicrafters] WTB SX-42 RF deck cover Message-ID: <14c2c48d185-3e5a-5274@webprd-a49.mail.aol.com> Looking for an SX-42 RF deck cover . Thanks Nick From jeff at podengo.com Sat Mar 21 11:06:57 2015 From: jeff at podengo.com (Jeff) Date: Sat, 21 Mar 2015 11:06:57 -0400 Subject: [Hallicrafters] SX-117 VFO output Message-ID: <550D8911.9080306@podengo.com> Does anyone know the specs on the VFO output of the SX-117? According to the manual, it has a 6-6.5 MHz output, but I can't seem to find anything on the output level. I tried hooking it to my Hammarlund HX-50A external VFO input, but I don't seem to be getting anything out of the 117. The external VFO input on the HX-50A is fine; I'm driving it with a DDS VFO in stand alone mode. The HX-50A is looking for the same frequency output at approximately 3v. I was looking to try to get these two rigs to work in transceiver mode. For some reason, Hammarlund receivers weren't built to do this. Appreciate any thoughts or advice. From magnuson at mac.com Wed Mar 25 23:24:26 2015 From: magnuson at mac.com (Waldo Magnuson) Date: Thu, 26 Mar 2015 03:24:26 +0000 (GMT) Subject: [Hallicrafters] SX-62 Sensitivity capacitor Message-ID: <8e09f014-c966-404e-9413-4526ef960dfd@me.com> Hi, ? ?I'm trying to straighten out a somewhat hacked SX-62 and have a question about the Sensitivity Control bypass capacitor value. ?My schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) there has been a 100 uf capacitor plus the 0.22. ?Has there been a suggested modification to the C24 value? Thanks. Skip W7WGM From 1oldlens1 at ix.netcom.com Thu Mar 26 02:02:12 2015 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Wed, 25 Mar 2015 23:02:12 -0700 Subject: [Hallicrafters] SX-62 Sensitivity capacitor In-Reply-To: <8e09f014-c966-404e-9413-4526ef960dfd@me.com> References: <8e09f014-c966-404e-9413-4526ef960dfd@me.com> Message-ID: <5513A0E4.4050703@ix.netcom.com> Do you mean 100 uf or uuf (pf)? If the latter sometimes small caps were put in parallel with larger ones to insure bypassing at high frequencies. On 3/25/2015 8:24 PM, Waldo Magnuson wrote: > Hi, > I'm trying to straighten out a somewhat hacked SX-62 and have a > question about the Sensitivity Control bypass capacitor value. My > schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) > there has been a 100 uf capacitor plus the 0.22. Has there been a > suggested modification to the C24 value? Thanks. > Skip W7WGM > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL From hallicrafters at mailman.qth.net Thu Mar 26 02:09:07 2015 From: hallicrafters at mailman.qth.net (Asif Khan via Hallicrafters) Date: Thu, 26 Mar 2015 02:09:07 -0400 Subject: [Hallicrafters] SX-62 Sensitivity capacitor In-Reply-To: <5513A0E4.4050703@ix.netcom.com> Message-ID: <14c54b2d227-675b-4f20@webprd-a49.mail.aol.com> The .22uF in parallel with the 100uF (yes that value is correct) across the sensitivity pot was also used in all of the SX-42 receivers except the really early ones. Nick -----Original Message----- From: Richard Knoppow <1oldlens1 at ix.netcom.com> To: hallicrafters Sent: Wed, Mar 25, 2015 11:02 pm Subject: Re: [Hallicrafters] SX-62 Sensitivity capacitor Do you mean 100 uf or uuf (pf)? If the latter sometimes small caps were put in parallel with larger ones to insure bypassing at high frequencies. On 3/25/2015 8:24 PM, Waldo Magnuson wrote: > Hi, > I'm trying to straighten out a somewhat hacked SX-62 and have a > question about the Sensitivity Control bypass capacitor value. My > schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) > there has been a 100 uf capacitor plus the 0.22. Has there been a > suggested modification to the C24 value? Thanks. > Skip W7WGM > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From 1oldlens1 at ix.netcom.com Thu Mar 26 02:22:25 2015 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Wed, 25 Mar 2015 23:22:25 -0700 Subject: [Hallicrafters] SX-62 Sensitivity capacitor In-Reply-To: <8e09f014-c966-404e-9413-4526ef960dfd@me.com> References: <8e09f014-c966-404e-9413-4526ef960dfd@me.com> Message-ID: <5513A5A1.6020507@ix.netcom.com> After looking at three versions of the handbook on BAMA it appears that there are both a 0.22 or 0.25uf and a 100 uf across the same point. The 100 uf is C-127 I can't make out why other than they may be physically separated. Very odd arrangement. This appears to vary the screen grid voltage on V2. On 3/25/2015 8:24 PM, Waldo Magnuson wrote: > Hi, > I'm trying to straighten out a somewhat hacked SX-62 and have a > question about the Sensitivity Control bypass capacitor value. My > schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) > there has been a 100 uf capacitor plus the 0.22. Has there been a > suggested modification to the C24 value? Thanks. > Skip W7WGM > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL From cbmcgr at gmail.com Thu Mar 26 09:34:31 2015 From: cbmcgr at gmail.com (Chuck McGregor) Date: Thu, 26 Mar 2015 06:34:31 -0700 Subject: [Hallicrafters] SX-62 Sensitivity capacitor In-Reply-To: <5513A5A1.6020507@ix.netcom.com> References: <8e09f014-c966-404e-9413-4526ef960dfd@me.com> <5513A5A1.6020507@ix.netcom.com> Message-ID: C127, the 100mfd capacitor was added to the early SX-42 schematic, as documented in change 16 in Hallicrafters Service Hint #21 dated October 20, 1947. It was correctly added to the schematic, but on some SX-42 parts lists it was erroneously listed as 100 or 110 mmf. Service Hint #21 is in BAMA: http://bama.edebris.com/manuals/hallicra/sx42/ -Chuck K7MCG On Wed, Mar 25, 2015 at 11:22 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote: > After looking at three versions of the handbook on BAMA it appears > that there are both a 0.22 or 0.25uf and a 100 uf across the same point. > The 100 uf is C-127 I can't make out why other than they may be physically > separated. Very odd arrangement. This appears to vary the screen grid > voltage on V2. > > On 3/25/2015 8:24 PM, Waldo Magnuson wrote: >> >> Hi, >> I'm trying to straighten out a somewhat hacked SX-62 and have a >> question about the Sensitivity Control bypass capacitor value. My schematic >> shows 0.22 uf (C24) but in both SX-62s I have (I have 2) there has been a >> 100 uf capacitor plus the 0.22. Has there been a suggested modification to >> the C24 value? Thanks. >> Skip W7WGM >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > -- > Richard Knoppow > 1oldlens1 at ix.netcom.com > WB6KBL > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From hallicrafterssr2000 at k9axn.com Thu Mar 26 11:50:29 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Thu, 26 Mar 2015 10:50:29 -0500 Subject: [Hallicrafters] SX-62 Sensitivity capacitor In-Reply-To: References: <8e09f014-c966-404e-9413-4526ef960dfd@me.com><5513A5A1.6020507@ix.netcom.com> Message-ID: <9C70FAAC1493490FBA49069BDFE289C2@LILESJLAPTOP> Chuck, Do you have the change notes for that radio. Would be interested if you do. Kindest regards Jim K9AXN -----Original Message----- From: Chuck McGregor Sent: Thursday, March 26, 2015 8:34 AM To: Richard Knoppow Cc: hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] SX-62 Sensitivity capacitor C127, the 100mfd capacitor was added to the early SX-42 schematic, as documented in change 16 in Hallicrafters Service Hint #21 dated October 20, 1947. It was correctly added to the schematic, but on some SX-42 parts lists it was erroneously listed as 100 or 110 mmf. Service Hint #21 is in BAMA: http://bama.edebris.com/manuals/hallicra/sx42/ -Chuck K7MCG On Wed, Mar 25, 2015 at 11:22 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote: > After looking at three versions of the handbook on BAMA it appears > that there are both a 0.22 or 0.25uf and a 100 uf across the same point. > The 100 uf is C-127 I can't make out why other than they may be > physically > separated. Very odd arrangement. This appears to vary the screen grid > voltage on V2. > > On 3/25/2015 8:24 PM, Waldo Magnuson wrote: >> >> Hi, >> I'm trying to straighten out a somewhat hacked SX-62 and have a >> question about the Sensitivity Control bypass capacitor value. My >> schematic >> shows 0.22 uf (C24) but in both SX-62s I have (I have 2) there has been a >> 100 uf capacitor plus the 0.22. Has there been a suggested modification >> to >> the C24 value? Thanks. >> Skip W7WGM >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > -- > Richard Knoppow > 1oldlens1 at ix.netcom.com > WB6KBL > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From james.liles at comcast.net Thu Mar 26 11:47:59 2015 From: james.liles at comcast.net (james.liles at comcast.net) Date: Thu, 26 Mar 2015 10:47:59 -0500 Subject: [Hallicrafters] Hallicrafters Digest, Vol 134, Issue 12 In-Reply-To: References: Message-ID: <2892B538AAED47778BBE026E03765A6B@LILESJLAPTOP> Good morning didn't get your name, The 6.0 to 6.5 output is the first I.F. not the VFO. The VFO is 4.35Mc to 4.85Mc Good luck ---- Kindest regards Jim K9AXN -----Original Message----- From: hallicrafters-request at mailman.qth.net Sent: Thursday, March 26, 2015 8:34 AM To: hallicrafters at mailman.qth.net Subject: Hallicrafters Digest, Vol 134, Issue 12 Send Hallicrafters mailing list submissions to hallicrafters at mailman.qth.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.qth.net/mailman/listinfo/hallicrafters or, via email, send a message with subject or body 'help' to hallicrafters-request at mailman.qth.net You can reach the person managing the list at hallicrafters-owner at mailman.qth.net When replying, please edit your Subject line so it is more specific than "Re: Contents of Hallicrafters digest..." Today's Topics: 1. SX-117 VFO output (Jeff) 2. SX-62 Sensitivity capacitor (Waldo Magnuson) 3. Re: SX-62 Sensitivity capacitor (Richard Knoppow) 4. Re: SX-62 Sensitivity capacitor (Asif Khan via Hallicrafters) 5. Re: SX-62 Sensitivity capacitor (Richard Knoppow) 6. Re: SX-62 Sensitivity capacitor (Chuck McGregor) ---------------------------------------------------------------------- Message: 1 Date: Sat, 21 Mar 2015 11:06:57 -0400 From: Jeff To: Hallicrafters at mailman.qth.net Subject: [Hallicrafters] SX-117 VFO output Message-ID: <550D8911.9080306 at podengo.com> Content-Type: text/plain; charset=utf-8; format=flowed Does anyone know the specs on the VFO output of the SX-117? According to the manual, it has a 6-6.5 MHz output, but I can't seem to find anything on the output level. I tried hooking it to my Hammarlund HX-50A external VFO input, but I don't seem to be getting anything out of the 117. The external VFO input on the HX-50A is fine; I'm driving it with a DDS VFO in stand alone mode. The HX-50A is looking for the same frequency output at approximately 3v. I was looking to try to get these two rigs to work in transceiver mode. For some reason, Hammarlund receivers weren't built to do this. Appreciate any thoughts or advice. ------------------------------ Message: 2 Date: Thu, 26 Mar 2015 03:24:26 +0000 (GMT) From: Waldo Magnuson To: "hallicrafters at mailman.qth.net" Subject: [Hallicrafters] SX-62 Sensitivity capacitor Message-ID: <8e09f014-c966-404e-9413-4526ef960dfd at me.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi, ? ?I'm trying to straighten out a somewhat hacked SX-62 and have a question about the Sensitivity Control bypass capacitor value. ?My schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) there has been a 100 uf capacitor plus the 0.22. ?Has there been a suggested modification to the C24 value? Thanks. Skip W7WGM ------------------------------ Message: 3 Date: Wed, 25 Mar 2015 23:02:12 -0700 From: Richard Knoppow <1oldlens1 at ix.netcom.com> To: hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] SX-62 Sensitivity capacitor Message-ID: <5513A0E4.4050703 at ix.netcom.com> Content-Type: text/plain; charset=windows-1252; format=flowed Do you mean 100 uf or uuf (pf)? If the latter sometimes small caps were put in parallel with larger ones to insure bypassing at high frequencies. On 3/25/2015 8:24 PM, Waldo Magnuson wrote: > Hi, > I'm trying to straighten out a somewhat hacked SX-62 and have a > question about the Sensitivity Control bypass capacitor value. My > schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) > there has been a 100 uf capacitor plus the 0.22. Has there been a > suggested modification to the C24 value? Thanks. > Skip W7WGM > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL ------------------------------ Message: 4 Date: Thu, 26 Mar 2015 02:09:07 -0400 From: Asif Khan via Hallicrafters To: Hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] SX-62 Sensitivity capacitor Message-ID: <14c54b2d227-675b-4f20 at webprd-a49.mail.aol.com> Content-Type: text/plain; charset=utf-8 The .22uF in parallel with the 100uF (yes that value is correct) across the sensitivity pot was also used in all of the SX-42 receivers except the really early ones. Nick -----Original Message----- From: Richard Knoppow <1oldlens1 at ix.netcom.com> To: hallicrafters Sent: Wed, Mar 25, 2015 11:02 pm Subject: Re: [Hallicrafters] SX-62 Sensitivity capacitor Do you mean 100 uf or uuf (pf)? If the latter sometimes small caps were put in parallel with larger ones to insure bypassing at high frequencies. On 3/25/2015 8:24 PM, Waldo Magnuson wrote: > Hi, > I'm trying to straighten out a somewhat hacked SX-62 and have a > question about the Sensitivity Control bypass capacitor value. My > schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) > there has been a 100 uf capacitor plus the 0.22. Has there been a > suggested modification to the C24 value? Thanks. > Skip W7WGM > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ------------------------------ Message: 5 Date: Wed, 25 Mar 2015 23:22:25 -0700 From: Richard Knoppow <1oldlens1 at ix.netcom.com> To: hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] SX-62 Sensitivity capacitor Message-ID: <5513A5A1.6020507 at ix.netcom.com> Content-Type: text/plain; charset=windows-1252; format=flowed After looking at three versions of the handbook on BAMA it appears that there are both a 0.22 or 0.25uf and a 100 uf across the same point. The 100 uf is C-127 I can't make out why other than they may be physically separated. Very odd arrangement. This appears to vary the screen grid voltage on V2. On 3/25/2015 8:24 PM, Waldo Magnuson wrote: > Hi, > I'm trying to straighten out a somewhat hacked SX-62 and have a > question about the Sensitivity Control bypass capacitor value. My > schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) > there has been a 100 uf capacitor plus the 0.22. Has there been a > suggested modification to the C24 value? Thanks. > Skip W7WGM > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL ------------------------------ Message: 6 Date: Thu, 26 Mar 2015 06:34:31 -0700 From: Chuck McGregor To: Richard Knoppow <1oldlens1 at ix.netcom.com> Cc: "hallicrafters at mailman.qth.net" Subject: Re: [Hallicrafters] SX-62 Sensitivity capacitor Message-ID: Content-Type: text/plain; charset=UTF-8 C127, the 100mfd capacitor was added to the early SX-42 schematic, as documented in change 16 in Hallicrafters Service Hint #21 dated October 20, 1947. It was correctly added to the schematic, but on some SX-42 parts lists it was erroneously listed as 100 or 110 mmf. Service Hint #21 is in BAMA: http://bama.edebris.com/manuals/hallicra/sx42/ -Chuck K7MCG On Wed, Mar 25, 2015 at 11:22 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote: > After looking at three versions of the handbook on BAMA it appears > that there are both a 0.22 or 0.25uf and a 100 uf across the same point. > The 100 uf is C-127 I can't make out why other than they may be > physically > separated. Very odd arrangement. This appears to vary the screen grid > voltage on V2. > > On 3/25/2015 8:24 PM, Waldo Magnuson wrote: >> >> Hi, >> I'm trying to straighten out a somewhat hacked SX-62 and have a >> question about the Sensitivity Control bypass capacitor value. My >> schematic >> shows 0.22 uf (C24) but in both SX-62s I have (I have 2) there has been a >> 100 uf capacitor plus the 0.22. Has there been a suggested modification >> to >> the C24 value? Thanks. >> Skip W7WGM >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > -- > Richard Knoppow > 1oldlens1 at ix.netcom.com > WB6KBL > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ------------------------------ Subject: Digest Footer ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ------------------------------ End of Hallicrafters Digest, Vol 134, Issue 12 ********************************************** From gomez.smith at gmail.com Thu Mar 26 17:46:02 2015 From: gomez.smith at gmail.com (=?UTF-8?Q?Javier_G=C3=B3mez?=) Date: Thu, 26 Mar 2015 17:46:02 -0400 Subject: [Hallicrafters] SX-62 Sensitivity capacitor In-Reply-To: <9C70FAAC1493490FBA49069BDFE289C2@LILESJLAPTOP> References: <8e09f014-c966-404e-9413-4526ef960dfd@me.com> <5513A5A1.6020507@ix.netcom.com> <9C70FAAC1493490FBA49069BDFE289C2@LILESJLAPTOP> Message-ID: Both SX-42 and SX-62 were very similar electrically, so the info below should apply to your radio. In Hallicrafters Service Hint No. 21, a summary of modifications for the SX-42 Receiver, dated October 20, 1947, under #15 (Sensitivity Control), we find: "Install a 100 mfd. condenser C127 (45A116) between center terminal of sensitivity control and ground". The purpose of this modification was to eliminate motorboating with change of setting of sensitivity control. Also, the same source also indicates another modification (#7) to eliminate motorboating, and reduce time constant AVC circuit: "Install series combination R98, 1000 ohms (RC20AE102M) and C126, 0.05 mfd (46AU503) in parallel with series resistors R11 and R9. A tie lug is necessary for this operation." 73, VE2XGS ...... >> I'm trying to straighten out a somewhat hacked SX-62 and have a question about the Sensitivity Control bypass capacitor value. My schematic shows 0.22 uf (C24) but in both SX-62s I have (I have 2) there has been a 100 uf capacitor plus the 0.22. Has there been a suggested modification to the C24 value? From MLangston at pricegregory.com Thu Mar 26 21:30:28 2015 From: MLangston at pricegregory.com (Langston, Mike) Date: Thu, 26 Mar 2015 20:30:28 -0500 Subject: [Hallicrafters] Attenuators for T-bolt xciters Message-ID: Hello, I have a V-II that I am going to use on AM to drive a T-bolt linear. I have built up an attenuator for use between the units per the T-bolt manual schematic. It is enclosed in an alum. project box except for the 75W light bulb which is mounted on top. First problem was finding a 75W incandescent bulb. Closest I came was a 73W halogen bulb. Q1 - will that work? Q2 - the bulb is not shielded. Do I need to worry about that? Any help appreciated. Mike KL7CD Sent from my iPhone From w5jo at brightok.net Thu Mar 26 21:44:40 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Thu, 26 Mar 2015 20:44:40 -0500 Subject: [Hallicrafters] Attenuators for T-bolt xciters In-Reply-To: References: Message-ID: Hi Mike, 75 watt incandescent bulbs are all over eBay and Amazon. You will have to buy more than one. Jim W5JO -----Original Message----- First problem was finding a 75W incandescent bulb. Closest I came was a 73W halogen bulb. Q1 - will that work? Q2 - the bulb is not shielded. Do I need to worry about that? Any help appreciated. From MLangston at pricegregory.com Thu Mar 26 21:48:35 2015 From: MLangston at pricegregory.com (Langston, Mike) Date: Thu, 26 Mar 2015 20:48:35 -0500 Subject: [Hallicrafters] Attenuators for T-bolt xciters In-Reply-To: References: Message-ID: <5685C121-61DB-4E53-84E0-35C4D8026BF9@pricegregory.com> Never thought of that. I can use more than 1! Thanks! Still waiting on shielding responses. Mike KL7CD Sent from my iPhone > On Mar 26, 2015, at 8:45 PM, Jim Wilhite wrote: > > Hi Mike, > > 75 watt incandescent bulbs are all over eBay and Amazon. You will have to > buy more than one. > > Jim > W5JO > > -----Original Message----- > > > > First problem was finding a 75W incandescent bulb. Closest I came was a 73W > halogen bulb. > > Q1 - will that work? > Q2 - the bulb is not shielded. Do I need to worry about that? > > Any help appreciated. > > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From radio at daileyservices.com Fri Mar 27 00:14:49 2015 From: radio at daileyservices.com (Tom Dailey) Date: Thu, 26 Mar 2015 22:14:49 -0600 Subject: [Hallicrafters] Hallicrafters Digest, Vol 134, Issue 13 In-Reply-To: References: Message-ID: <1A3D6310905B493280DBEF27ADFBC695@TomLaptop> why does everybody constantly REPEAT the same messages? --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From k9sth at sbcglobal.net Fri Mar 27 10:47:30 2015 From: k9sth at sbcglobal.net (Glen Zook) Date: Fri, 27 Mar 2015 14:47:30 +0000 (UTC) Subject: [Hallicrafters] Hallicrafters Digest, Vol 134, Issue 13 In-Reply-To: <1A3D6310905B493280DBEF27ADFBC695@TomLaptop> References: <1A3D6310905B493280DBEF27ADFBC695@TomLaptop> Message-ID: <1693346608.2860053.1427467650582.JavaMail.yahoo@mail.yahoo.com> Some E-Mail services/ISPs no longer allow one to edit replies to remove the old information. ?This is the case with sbcglobal.net which I am using right now. ?It is definitely a real pain in the posterior!?Glen, K9STH website: ?http://k9sth.net On Thursday, March 26, 2015 11:16 PM, Tom Dailey wrote: why does everybody constantly REPEAT the same messages? --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From K2RJK at VERIZON.NET Fri Mar 27 12:33:33 2015 From: K2RJK at VERIZON.NET (Ray Keefe) Date: Fri, 27 Mar 2015 12:33:33 -0400 Subject: [Hallicrafters] Hallicrafters Digest, Vol 134, Issue 13 In-Reply-To: <1693346608.2860053.1427467650582.JavaMail.yahoo@mail.yahoo.com> References: <1A3D6310905B493280DBEF27ADFBC695@TomLaptop> <1693346608.2860053.1427467650582.JavaMail.yahoo@mail.yahoo.com> Message-ID: <5515865D.2000704@VERIZON.NET> It may also be the users email client that has the recap or quote option turned on. I use Thunderbird and the option is in there to put my reply above or below the original quote. -- Check out my shop for handmade items for ham radio operators http://www.etsy.com/shop/TheWoodenHam See more completed work on Facebook The Wooden Ham From magnuson at mac.com Sat Mar 28 18:01:51 2015 From: magnuson at mac.com (Waldo Magnuson) Date: Sat, 28 Mar 2015 22:01:51 +0000 (GMT) Subject: [Hallicrafters] SX-62 knobs wanted. Message-ID: Hi, ?I need three knobs for the SX-62 I am working on. They are: Band Selector, Tuning (both 1 1/2 in. dia. and may have a silver insert), and the Pointer Reset (small black, 11/16 in. dis.). Are there any out there and available? Thanks. 73s, Skip W7WGM From radio at daileyservices.com Sat Mar 28 20:29:57 2015 From: radio at daileyservices.com (Tom Dailey) Date: Sat, 28 Mar 2015 18:29:57 -0600 Subject: [Hallicrafters] Rare Knobs In-Reply-To: References: Message-ID: I have a buddy with a 3D printer and scanner - we're gonna try to duplicate some of the rarer knobs, like those from SX-28As, SX-62s, SX-71s, Collins 75A4s, etc. Depending on the time involved, we just might have something there. I do NOT think however, that the original media would take the stress, so we'd have to find some different media. A work in progress. Tom - W0EAJ --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From davemarquart at gmail.com Sun Mar 29 10:28:08 2015 From: davemarquart at gmail.com (Dave Marquart) Date: Sun, 29 Mar 2015 08:28:08 -0600 Subject: [Hallicrafters] S-20 knob Message-ID: A few weeks ago, someone what looking for a small knob for an early receiver. I found a small knob for a S-20. If it will help, let me know.. 73 Dave -- Dave Marquart 3100 E Victory Rd Meridian, ID 83642 208 559-4747 cell davemarquart at gmail.com From k9sth at sbcglobal.net Sun Mar 29 12:20:33 2015 From: k9sth at sbcglobal.net (Glen Zook) Date: Sun, 29 Mar 2015 16:20:33 +0000 (UTC) Subject: [Hallicrafters] Rare Knobs In-Reply-To: References: Message-ID: <1801639147.655835.1427646033649.JavaMail.yahoo@mail.yahoo.com> Just to let you know, the Dakaware knobs used on the Collins A-Line receivers are still in production and are available from various sources.?Glen, K9STH website: ?http://k9sth.net On Sunday, March 29, 2015 1:40 AM, Tom Dailey wrote: I have a buddy with a 3D printer and scanner - we're gonna try to duplicate some of the rarer knobs, like those from SX-28As, SX-62s, SX-71s, Collins 75A4s, etc.? Depending on the time involved, we just might have something there.? I do NOT think however, that the original media would take the stress, so we'd have to find some different media.? A work in progress. Tom - W0EAJ --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From kc9gq7 at gmail.com Mon Mar 30 00:32:10 2015 From: kc9gq7 at gmail.com (Rich Oliver) Date: Sun, 29 Mar 2015 21:32:10 -0700 Subject: [Hallicrafters] Rare Knobs In-Reply-To: <1801639147.655835.1427646033649.JavaMail.yahoo@mail.yahoo.com> References: <1801639147.655835.1427646033649.JavaMail.yahoo@mail.yahoo.com> Message-ID: Printing knobs is a great idea. I have seen attempts at molding knobs and it is very disappointing. Good luck! 73, Rich On Sun, Mar 29, 2015 at 9:20 AM, Glen Zook wrote: > Just to let you know, the Dakaware knobs used on the Collins A-Line > receivers are still in production and are available from various > sources. Glen, K9STH > > website: http://k9sth.net > > > On Sunday, March 29, 2015 1:40 AM, Tom Dailey < > radio at daileyservices.com> wrote: > > > I have a buddy with a 3D printer and scanner - we're gonna try to > duplicate > some of the rarer knobs, like those from SX-28As, SX-62s, SX-71s, Collins > 75A4s, etc. Depending on the time involved, we just might have something > there. I do NOT think however, that the original media would take the > stress, so we'd have to find some different media. A work in progress. > > Tom - W0EAJ > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > From manualman at juno.com Mon Mar 30 02:56:53 2015 From: manualman at juno.com (manualman at juno.com) Date: Mon, 30 Mar 2015 02:56:53 -0400 Subject: [Hallicrafters] Rare Knobs Message-ID: Make knobs out of wood. Stain them what ever color you like. Get creative and add some coolness to your receiver or transmitter. Pete, wa2cwa On Sun, 29 Mar 2015 21:32:10 -0700 Rich Oliver writes: > Printing knobs is a great idea. I have seen attempts at molding > knobs and > it is very disappointing. > > Good luck! 73, Rich > > On Sun, Mar 29, 2015 at 9:20 AM, Glen Zook > wrote: > > > Just to let you know, the Dakaware knobs used on the Collins > A-Line > > receivers are still in production and are available from various > > sources. Glen, K9STH > > > > website: http://k9sth.net > > > > > > On Sunday, March 29, 2015 1:40 AM, Tom Dailey < > > radio at daileyservices.com> wrote: > > > > > > I have a buddy with a 3D printer and scanner - we're gonna try > to > > duplicate > > some of the rarer knobs, like those from SX-28As, SX-62s, SX-71s, > Collins > > 75A4s, etc. Depending on the time involved, we just might have > something > > there. I do NOT think however, that the original media would take > the > > stress, so we'd have to find some different media. A work in > progress. > > > > Tom - W0EAJ From kf9wv at att.net Mon Mar 30 09:31:10 2015 From: kf9wv at att.net (george frost) Date: Mon, 30 Mar 2015 13:31:10 +0000 (UTC) Subject: [Hallicrafters] SX-101A MK1 Message-ID: <328960357.1153807.1427722270342.JavaMail.yahoo@mail.yahoo.com> HAVE A NICE DIAL GLASS FOR THE SX-101A MK1. CONTACT OFF LINE...KF9WV From pincon at erols.com Mon Mar 30 10:41:47 2015 From: pincon at erols.com (Charlie T, K3ICH) Date: Mon, 30 Mar 2015 10:41:47 -0400 Subject: [Hallicrafters] Rare Knobs References: <1801639147.655835.1427646033649.JavaMail.yahoo@mail.yahoo.com> Message-ID: <10200130C34B40649176D171AB905FC0@pinnacle05df05> I don't think the material Bakelite lends it self very easily to 3D printing. Most of the 3D printed items I've seen have used a fairly low melting point & low grade plastic. In order to get a realistic looking knob, it would probably have to be painted. 73, Charlie k3ICH ----- Original Message ----- From: "Rich Oliver" To: "Glen Zook" Cc: ; "Tom Dailey" Sent: Monday, March 30, 2015 12:32 AM Subject: Re: [Hallicrafters] Rare Knobs > Printing knobs is a great idea. I have seen attempts at molding knobs and > it is very disappointing. > > Good luck! 73, Rich > > On Sun, Mar 29, 2015 at 9:20 AM, Glen Zook wrote: > >> Just to let you know, the Dakaware knobs used on the Collins A-Line >> receivers are still in production and are available from various >> sources. Glen, K9STH >> >> website: http://k9sth.net >> >> >> On Sunday, March 29, 2015 1:40 AM, Tom Dailey < >> radio at daileyservices.com> wrote: >> >> >> I have a buddy with a 3D printer and scanner - we're gonna try to >> duplicate >> some of the rarer knobs, like those from SX-28As, SX-62s, SX-71s, Collins >> 75A4s, etc. Depending on the time involved, we just might have something >> there. I do NOT think however, that the original media would take the >> stress, so we'd have to find some different media. A work in progress. >> >> Tom - W0EAJ >> >> >> --- >> This email has been checked for viruses by Avast antivirus software. >> http://www.avast.com >> >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> >> >> >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From hallicrafters at mailman.qth.net Mon Mar 30 12:24:22 2015 From: hallicrafters at mailman.qth.net (ron via Hallicrafters) Date: Mon, 30 Mar 2015 12:24:22 -0400 Subject: [Hallicrafters] Rare Knobs In-Reply-To: <10200130C34B40649176D171AB905FC0@pinnacle05df05> References: <1801639147.655835.1427646033649.JavaMail.yahoo@mail.yahoo.com> <10200130C34B40649176D171AB905FC0@pinnacle05df05> Message-ID: <14c6b7f87d6-7666-caa9@webprd-m87.mail.aol.com> If anybody needs the Drake style Dakaware knobs, my local Ace Hardware has a nice supply, cheap too.... ron -----Original Message----- From: Charlie T, K3ICH To: hallicrafters Sent: Mon, Mar 30, 2015 10:42 am Subject: Re: [Hallicrafters] Rare Knobs I don't think the material Bakelite lends it self very easily to 3D printing. Most of the 3D printed items I've seen have used a fairly low melting point & low grade plastic. In order to get a realistic looking knob, it would probably have to be painted. 73, Charlie k3ICH ----- Original Message ----- From: "Rich Oliver" To: "Glen Zook" Cc: ; "Tom Dailey" Sent: Monday, March 30, 2015 12:32 AM Subject: Re: [Hallicrafters] Rare Knobs > Printing knobs is a great idea. I have seen attempts at molding knobs and > it is very disappointing. > > Good luck! 73, Rich > > On Sun, Mar 29, 2015 at 9:20 AM, Glen Zook wrote: > >> Just to let you know, the Dakaware knobs used on the Collins A-Line >> receivers are still in production and are available from various >> sources. Glen, K9STH >> >> website: http://k9sth.net >> >> >> On Sunday, March 29, 2015 1:40 AM, Tom Dailey < >> radio at daileyservices.com> wrote: >> >> >> I have a buddy with a 3D printer and scanner - we're gonna try to >> duplicate >> some of the rarer knobs, like those from SX-28As, SX-62s, SX-71s, Collins >> 75A4s, etc. Depending on the time involved, we just might have something >> there. I do NOT think however, that the original media would take the >> stress, so we'd have to find some different media. A work in progress. >> >> Tom - W0EAJ >> >> >> --- >> This email has been checked for viruses by Avast antivirus software. >> http://www.avast.com >> >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> >> >> >> ______________________________________________________________ >> Hallicrafters mailing list >> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Hallicrafters at mailman.qth.net >> >> List Administrator: Duane Fischer, W8DBF >> ** For Assistance: dfischer at usol.com ** >> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From alf_fisher at tiscali.co.uk Mon Mar 30 16:38:57 2015 From: alf_fisher at tiscali.co.uk (Alf Fisher) Date: Mon, 30 Mar 2015 21:38:57 +0100 Subject: [Hallicrafters] Rare Knobs References: <1801639147.655835.1427646033649.JavaMail.yahoo@mail.yahoo.com><10200130C34B40649176D171AB905FC0@pinnacle05df05> <14c6b7f87d6-7666-caa9@webprd-m87.mail.aol.com> Message-ID: <71B24C69BAB3458480F36B90865F19FE@ALFSTUDY> Hi Ron, As you mentioned Dakaware knobs, I wonder if they have a couple of the lever types similar to the one in the attached picture. I believe they may have been used on guitars for switching pickups. If the picture doesn't get through, please let me know your email address and I will send it direct. 73 Alf G3WSD ----- Original Message ----- From: "ron via Hallicrafters" To: ; Sent: Monday, March 30, 2015 5:24 PM Subject: Re: [Hallicrafters] Rare Knobs > If anybody needs the Drake style Dakaware knobs, my local Ace Hardware has > a nice supply, cheap too.... > > ron --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From rsauvan at beyondbb.com Mon Mar 30 19:43:09 2015 From: rsauvan at beyondbb.com (Robert Sauvan) Date: Mon, 30 Mar 2015 17:43:09 -0600 Subject: [Hallicrafters] sources for alignment tools Message-ID: <5519DF8D.7010407@beyondbb.com> Hi all, I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs. I have been searching, but only find cheap looking plastic ones like I have presently. I would like to find something that is a bit harder and stronger than the ones I am finding. The ones I have, worked fine for a bit. But, when you run across a tough slug to turn, they sorta just slip and get rounded off due to the softer plastic. What is everyone using and where are you getting them? Thanks-Bob-W0YBS From k1lky68 at gmail.com Mon Mar 30 20:30:52 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Mon, 30 Mar 2015 20:30:52 -0400 Subject: [Hallicrafters] [Hammarlund] sources for alignment tools In-Reply-To: <5519DF8D.7010407@beyondbb.com> References: <5519DF8D.7010407@beyondbb.com> Message-ID: <0A9CAE76-012B-4BF6-B6C1-D90CBB9CF7D2@gmail.com> On Mar 30, 2015, at 7:43 PM, Robert Sauvan wrote: > Hi all, > I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs?. What is everyone using and where are you getting them? I am about to order some from Mouser. Here are notes I?ve made: Tuning tools: ? double ended flat on both ends. OK Industries AT-6241 Sold by Mouser as their part number 801-AT-6241 $1.83 (I can?t find this product in a catalog page on their online catalog.) The Collins 51s-1 manual mentions two tools four alignment use: ? double ended hex tool: GC type 9300, I think ? Walsco 2543 GC 8282 The General Cement Kit 5040 has the 9300 tool in it. This is the one with a hex end on both ends, one end is long and thin to reach through the top slug and adjust the bottom one in many IF cans. The GC tool is made of Delrin. I doubt you will find a stronger material. You can see info about the different GC kits at: http://www.gcelectronics.com/order/SubCatPDF/alignment%20tools%20Kits%20380-387.pdf It appears that Mouser does not sell the GC products, but only the Oak Industries tools. I find the GC kit 5040 at: https://octopart.com/5040-gc+electronics-4039163 $20 I would be glad to hear of other sources. Roy Roy Morgan k1lky68 at gmail.com K1LKY Since 1958 From james.liles at comcast.net Mon Mar 30 21:36:07 2015 From: james.liles at comcast.net (james.liles at comcast.net) Date: Mon, 30 Mar 2015 20:36:07 -0500 Subject: [Hallicrafters] [AMRadio] sources for alignment tools In-Reply-To: <5519DF8D.7010407@beyondbb.com> References: <5519DF8D.7010407@beyondbb.com> Message-ID: Hi Bob, I use a 2.5mm allan wrench to start them then the plastic. Helps to keep from splitting the slug. Kindest regards Jim K9AXN -----Original Message----- From: Robert Sauvan Sent: Monday, March 30, 2015 6:43 PM To: Hammarlund Mail List ; Hallicrafters ; AM Radio Subject: [AMRadio] sources for alignment tools Hi all, I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs. I have been searching, but only find cheap looking plastic ones like I have presently. I would like to find something that is a bit harder and stronger than the ones I am finding. The ones I have, worked fine for a bit. But, when you run across a tough slug to turn, they sorta just slip and get rounded off due to the softer plastic. What is everyone using and where are you getting them? Thanks-Bob-W0YBS ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From 1oldlens1 at ix.netcom.com Mon Mar 30 22:20:49 2015 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Mon, 30 Mar 2015 19:20:49 -0700 Subject: [Hallicrafters] Rare Knobs In-Reply-To: <71B24C69BAB3458480F36B90865F19FE@ALFSTUDY> References: <1801639147.655835.1427646033649.JavaMail.yahoo@mail.yahoo.com><10200130C34B40649176D171AB905FC0@pinnacle05df05> <14c6b7f87d6-7666-caa9@webprd-m87.mail.aol.com> <71B24C69BAB3458480F36B90865F19FE@ALFSTUDY> Message-ID: <551A0481.8030001@ix.netcom.com> I don't think this list accepts attachments. I think I know the type of lever knob you mean. I didn't know Dakaware was still in existence. They made knobs for Collins and everyone else. On 3/30/2015 1:38 PM, Alf Fisher wrote: > Hi Ron, > As you mentioned Dakaware knobs, I wonder if they have a couple of > the lever types similar to the one in the attached picture. > I believe they may have been used on guitars for switching pickups. > > If the picture doesn't get through, please let me know your email > address and I will send it direct. > > 73 > Alf > G3WSD > > > ----- Original Message ----- From: "ron via Hallicrafters" > > To: ; > Sent: Monday, March 30, 2015 5:24 PM > Subject: Re: [Hallicrafters] Rare Knobs > > >> If anybody needs the Drake style Dakaware knobs, my local Ace >> Hardware has a nice supply, cheap too.... >> >> ron > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL From 1oldlens1 at ix.netcom.com Mon Mar 30 22:24:03 2015 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Mon, 30 Mar 2015 19:24:03 -0700 Subject: [Hallicrafters] Rare Knobs In-Reply-To: <71B24C69BAB3458480F36B90865F19FE@ALFSTUDY> References: <1801639147.655835.1427646033649.JavaMail.yahoo@mail.yahoo.com><10200130C34B40649176D171AB905FC0@pinnacle05df05> <14c6b7f87d6-7666-caa9@webprd-m87.mail.aol.com> <71B24C69BAB3458480F36B90865F19FE@ALFSTUDY> Message-ID: <551A0543.8060709@ix.netcom.com> Turns out Dakaware is still around under their original name; Harry Davies Molding Co at http://www.daviesmolding.com/standard-products/plastic-knobs/skirted-knob/default.html They show some bar knobs but not lever knobs. It might be worth contacting them to find out if there are knobs they do not show on their web site. On 3/30/2015 1:38 PM, Alf Fisher wrote: > Hi Ron, > As you mentioned Dakaware knobs, I wonder if they have a couple of > the lever types similar to the one in the attached picture. > I believe they may have been used on guitars for switching pickups. > > If the picture doesn't get through, please let me know your email > address and I will send it direct. > > 73 > Alf > G3WSD > > > ----- Original Message ----- From: "ron via Hallicrafters" > > To: ; > Sent: Monday, March 30, 2015 5:24 PM > Subject: Re: [Hallicrafters] Rare Knobs > > >> If anybody needs the Drake style Dakaware knobs, my local Ace >> Hardware has a nice supply, cheap too.... >> >> ron > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > ______________________________________________________________ > Hallicrafters mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL From manualman at juno.com Tue Mar 31 02:47:32 2015 From: manualman at juno.com (manualman at juno.com) Date: Tue, 31 Mar 2015 02:47:32 -0400 Subject: [Hallicrafters] [AMRadio] sources for alignment tools Message-ID: It's much easier to split a soft powered slug that's very hard to turn or jammed in a core with an allen wrench. Get a good quality set of alignment tools that's designed for the job. Pete, wa2cwa On Mon, 30 Mar 2015 20:36:07 -0500 writes: > Hi Bob, > > I use a 2.5mm allan wrench to start them then the plastic. Helps to > keep > from splitting the slug. > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Robert Sauvan > Sent: Monday, March 30, 2015 6:43 PM > To: Hammarlund Mail List ; Hallicrafters ; AM Radio > Subject: [AMRadio] sources for alignment tools > > Hi all, > I am in need of some new alignment tools. In particular, the hex > head > piece to tune coil slugs. I have been searching, but only find > cheap > looking plastic ones like I have presently. I would like to find > something that is a bit harder and stronger than the ones I am > finding. > The ones I have, worked fine for a bit. But, when you run across a > tough > slug to turn, they sorta just slip and get rounded off due to the > softer > plastic. What is everyone using and where are you getting them? > > Thanks-Bob-W0YBS From manualman at juno.com Tue Mar 31 02:51:46 2015 From: manualman at juno.com (manualman at juno.com) Date: Tue, 31 Mar 2015 02:51:46 -0400 Subject: [Hallicrafters] Rare Knobs Message-ID: Many more choices: http://www.daviesmolding.com/standard-products/plastic-knobs/default.html Pete, wa2cwa On Mon, 30 Mar 2015 19:24:03 -0700 Richard Knoppow <1oldlens1 at ix.netcom.com> writes: > Turns out Dakaware is still around under their original name; Harry > Davies Molding Co at > http://www.daviesmolding.com/standard-products/plastic-knobs/skirted-knob /default.html > They show some bar knobs but not lever knobs. It might be worth > contacting them to find out if there are knobs they do not show on > their > web site. > > On 3/30/2015 1:38 PM, Alf Fisher wrote: > > Hi Ron, > > As you mentioned Dakaware knobs, I wonder if they have a couple > of > > the lever types similar to the one in the attached picture. > > I believe they may have been used on guitars for switching > pickups. > > > > If the picture doesn't get through, please let me know your email > > > address and I will send it direct. > > > > 73 > > Alf > > G3WSD > > > > > > ----- Original Message ----- From: "ron via Hallicrafters" > > > > To: ; > > Sent: Monday, March 30, 2015 5:24 PM > > Subject: Re: [Hallicrafters] Rare Knobs > > > > > >> If anybody needs the Drake style Dakaware knobs, my local Ace > >> Hardware has a nice supply, cheap too.... > >> > >> ron > > > > > > --- > > This email has been checked for viruses by Avast antivirus > software. > > http://www.avast.com > > ______________________________________________________________ > > Hallicrafters mailing list > > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Hallicrafters at mailman.qth.net > > > > List Administrator: Duane Fischer, W8DBF > > ** For Assistance: dfischer at usol.com ** > > > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: > http://www.qsl.net/donate.html > > > > -- > Richard Knoppow > 1oldlens1 at ix.netcom.com > WB6KBL > > ______________________________________________________________ > rs mailing list > Home: http://mailman.qth.net/mailman/listinfo/hallicrafters > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Hallicrafters at mailman.qth.net > > List Administrator: Duane Fischer, W8DBF > ** For Assistance: dfischer at usol.com ** > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > From rbethman at comcast.net Tue Mar 31 09:39:37 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 09:39:37 -0400 Subject: [Hallicrafters] sources for alignment tools In-Reply-To: References: Message-ID: <551AA399.7040001@comcast.net> List, There are two GC Electronics Kit # 5040 on ebay now. Regards, Bob - N0DGN From rbethman at comcast.net Tue Mar 31 09:46:11 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 09:46:11 -0400 Subject: [Hallicrafters] sources for alignment tools In-Reply-To: References: Message-ID: <551AA523.3030106@comcast.net> List, Go to: They have 13 in stock and are only $18.74. Lot Cheaper than E-Pay! Regards, Bob - N0DGN From hallicrafterssr2000 at k9axn.com Tue Mar 31 10:52:07 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Tue, 31 Mar 2015 09:52:07 -0500 Subject: [Hallicrafters] [AMRadio] sources for alignment tools In-Reply-To: References: Message-ID: Pete, My email folders are all screwed up and your right about the right tool. I am certain that I read somewhere someone has a very rigid alignment tool. Everything that I have is junk plastic. Point me. Kindest regards Jim K9AXN -----Original Message----- From: manualman at juno.com Sent: Tuesday, March 31, 2015 1:47 AM To: hammarlund at mailman.qth.net Cc: amradio at mailman.qth.net ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] [AMRadio] sources for alignment tools It's much easier to split a soft powered slug that's very hard to turn or jammed in a core with an allen wrench. Get a good quality set of alignment tools that's designed for the job. Pete, wa2cwa On Mon, 30 Mar 2015 20:36:07 -0500 writes: > Hi Bob, > > I use a 2.5mm allan wrench to start them then the plastic. Helps to > keep > from splitting the slug. > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Robert Sauvan > Sent: Monday, March 30, 2015 6:43 PM > To: Hammarlund Mail List ; Hallicrafters ; AM Radio > Subject: [AMRadio] sources for alignment tools > > Hi all, > I am in need of some new alignment tools. In particular, the hex > head > piece to tune coil slugs. I have been searching, but only find > cheap > looking plastic ones like I have presently. I would like to find > something that is a bit harder and stronger than the ones I am > finding. > The ones I have, worked fine for a bit. But, when you run across a > tough > slug to turn, they sorta just slip and get rounded off due to the > softer > plastic. What is everyone using and where are you getting them? > > Thanks-Bob-W0YBS ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From hallicrafters at mailman.qth.net Tue Mar 31 12:01:08 2015 From: hallicrafters at mailman.qth.net (Chris Farley via Hallicrafters) Date: Tue, 31 Mar 2015 11:01:08 -0500 Subject: [Hallicrafters] [AMRadio] sources for alignment tools Message-ID: I do not know of any currently available alignment tools, that aren't of the white or red plastic varitey. ?The more rigid ones I have came from hamfest junk boxes. ?Worth the time taken to hunt for them! ? Something you might consider, is getting a piece of suitably sized fiberglass rod and filing the end into the size hex or slot that you need. ?McMaster-Carr sells fiberglass rod, if you do not have a local source. ? Regards,?Chris kc9ieq Sent from my SMRTphone -------- Original message -------- From: Jim Liles Date: 03/31/2015 9:52 AM (GMT-06:00) To: hammarlund at mailman.qth.net, manualman at juno.com Cc: amradio at mailman.qth.net, hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] [AMRadio] sources for alignment tools Pete, My email folders are all screwed up and your right about the right tool.? I am certain that I read somewhere someone has a very rigid alignment tool. Everything that I have is junk plastic.? Point me. Kindest regards Jim K9AXN -----Original Message----- From: manualman at juno.com Sent: Tuesday, March 31, 2015 1:47 AM To: hammarlund at mailman.qth.net Cc: amradio at mailman.qth.net ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] [AMRadio] sources for alignment tools It's much easier to split a soft powered slug that's very hard to turn or jammed in a core with an allen wrench. Get a good quality set of alignment tools that's designed for the job. Pete, wa2cwa On Mon, 30 Mar 2015 20:36:07 -0500 writes: > Hi Bob, > > I use a 2.5mm allan wrench to start them then the plastic.? Helps to > keep > from splitting the slug. > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Robert Sauvan > Sent: Monday, March 30, 2015 6:43 PM > To: Hammarlund Mail List ; Hallicrafters ; AM Radio > Subject: [AMRadio] sources for alignment tools > > Hi all, > I am in need of some new alignment tools. In particular, the hex > head > piece to tune coil slugs. I have been searching, but only find > cheap > looking plastic ones like I have presently. I would like to find > something that is a bit harder and stronger than the ones I am > finding. > The ones I have, worked fine for a bit. But, when you run across a > tough > slug to turn, they sorta just slip and get rounded off due to the > softer > plastic. What is everyone using and where are you getting them? > > Thanks-Bob-W0YBS ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From manualman at juno.com Tue Mar 31 15:14:15 2015 From: manualman at juno.com (manualman at juno.com) Date: Tue, 31 Mar 2015 15:14:15 -0400 Subject: [Hallicrafters] [AMRadio] sources for alignment tools Message-ID: I bought one of those GC alignment tool pouches with 20 to 30 (maybe even more) different short, long tools with a wide variety of different ends back in the mid 70's. I'm still using those same tools. On the rare occasion I need an alignment tool that requires a unique end and/or shaft diameter, I generally fabricate it out of round wood stock or some fiberglass. The only time I remember having slippage with a tool, it was due to the previous owner(s) reaming out the slots in the core with probably the wrong tool. Sometimes dropping a length or two of dental floss down into the core and then inserting the tool provides the grip action you need to turn the core. Pete, wa2cwa On Tue, 31 Mar 2015 09:52:07 -0500 "Jim Liles" writes: > Pete, > > My email folders are all screwed up and your right about the right > tool. I > am certain that I read somewhere someone has a very rigid alignment > tool. > Everything that I have is junk plastic. Point me. > > Kindest regards Jim K9AXN > > > > -----Original Message----- > From: manualman at juno.com > Sent: Tuesday, March 31, 2015 1:47 AM > To: hammarlund at mailman.qth.net > Cc: amradio at mailman.qth.net ; hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] [AMRadio] sources for alignment tools > > It's much easier to split a soft powered slug that's very hard to > turn or > jammed in a core with an allen wrench. Get a good quality set of > alignment tools that's designed for the job. > > Pete, wa2cwa > > On Mon, 30 Mar 2015 20:36:07 -0500 > writes: > > Hi Bob, > > > > I use a 2.5mm allan wrench to start them then the plastic. Helps > to > > keep > > from splitting the slug. > > > > Kindest regards Jim K9AXN From magnuson at mac.com Tue Mar 31 16:30:58 2015 From: magnuson at mac.com (Waldo Magnuson) Date: Tue, 31 Mar 2015 13:30:58 -0700 Subject: [Hallicrafters] Knob search expanded Message-ID: <0AD6E926-52AF-4E48-9A9F-610E90321782@mac.com> Hi, I'm still looking for the large knobs for the SX-62 I am resurrecting. I'm told that the knobs (1 1/2 in. Dia.) from the S-40A and SX -43 are the same. Any of those out there? I did locate SX-62 knobs but had to take the whole receiver which I declined. 73s, Skip W7WGM

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