From hallicrafters at mailman.qth.net Sun Feb 1 16:49:42 2015 From: hallicrafters at mailman.qth.net (chuck groome via Hallicrafters) Date: Sun, 1 Feb 2015 16:49:42 -0500 Subject: [Hallicrafters] SR-150 Message-ID: <72ef4.65370802.41fff976@aol.com> Im in need of a K2 Relay for the SR-150.12vdc 3pole double throw. size matters. original Pt # 021-000651 does any one have one or know where to get.used is ok as long as it is guarenteed to be good. Thanks _chuckgroome at aol.com_ (mailto:chuckgroome at aol.com) From anchor at ec.rr.com Sun Feb 1 16:58:12 2015 From: anchor at ec.rr.com (Al Parker) Date: Sun, 01 Feb 2015 16:58:12 -0500 Subject: [Hallicrafters] SR-150 In-Reply-To: <72ef4.65370802.41fff976@aol.com> References: <72ef4.65370802.41fff976@aol.com> Message-ID: <54CEA174.8010204@ec.rr.com> Hi, Get in touch with Walt Cates, WD0GOF, cateswa at msn.com He "just might" be able to take good care of you. 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 2/1/2015 4:49 PM, chuck groome via Hallicrafters wrote: > Im in need of a K2 Relay for the SR-150.12vdc 3pole double throw. size > matters. original Pt # 021-000651 does any one have one or know where to > get.used is ok as long as it is guarenteed to be good. Thanks > _chuckgroome at aol.com_ (mailto:chuckgroome at aol.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 robert at isquare.com Sun Feb 1 17:27:49 2015 From: robert at isquare.com (Bob Sullivan) Date: Sun, 1 Feb 2015 17:27:49 -0500 Subject: [Hallicrafters] SR-150 In-Reply-To: <72ef4.65370802.41fff976@aol.com> References: <72ef4.65370802.41fff976@aol.com> Message-ID: <900C11FB-08B4-429F-AFD2-B64F910F4D1D@isquare.com> Chuck, It's a common item. Check eBay for dozens of possibilities. 73, Bob W?YVA http://www.isquare.com/personal_pages/ras-hardware.htm On Feb 1, 2015, at 4:49 PM, chuck groome via Hallicrafters wrote: > Im in need of a K2 Relay for the SR-150.12vdc 3pole double throw. size > matters. original Pt # 021-000651 does any one have one or know where to > get.used is ok as long as it is guarenteed to be good. Thanks > _chuckgroome at aol.com_ (mailto:chuckgroome at aol.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 cateswa at msn.com Sun Feb 1 18:16:29 2015 From: cateswa at msn.com (Walt Cates) Date: Sun, 1 Feb 2015 17:16:29 -0600 Subject: [Hallicrafters] SR-150 In-Reply-To: <900C11FB-08B4-429F-AFD2-B64F910F4D1D@isquare.com> References: <72ef4.65370802.41fff976@aol.com>, <900C11FB-08B4-429F-AFD2-B64F910F4D1D@isquare.com> Message-ID: K3 and K3 in the SR-150 are rather unique. They have 780 ohm/16vdc coil. It is critical because the coils of K2 and K3 in parallel form the 390 ohm cathode resistance for the audio output tube (V13). Commonly the relays coil resistance varied from 740 to 790 ohms. Anything outside that range will cause V13 to cutoff or saturate and the relays will not pull in on turn on or de-energize in TX mode. HAYSEED RADIO will soon have a mod kit for the K2/K3 problem in the SR-150. Best Regards, Walt Cates, WD0GOF We will not be judged on what we believe, but on what we put into practice. > From: robert at isquare.com > Date: Sun, 1 Feb 2015 17:27:49 -0500 > To: ChuckGroome at aol.com > CC: hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] SR-150 > > Chuck, > > It's a common item. Check eBay for dozens of possibilities. > > 73, Bob > W?YVA > http://www.isquare.com/personal_pages/ras-hardware.htm > > On Feb 1, 2015, at 4:49 PM, chuck groome via Hallicrafters wrote: > > > Im in need of a K2 Relay for the SR-150.12vdc 3pole double throw. size > > matters. original Pt # 021-000651 does any one have one or know where to > > get.used is ok as long as it is guarenteed to be good. Thanks > > _chuckgroome at aol.com_ (mailto:chuckgroome at aol.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 cateswa at msn.com Sun Feb 1 23:34:16 2015 From: cateswa at msn.com (Walt Cates) Date: Sun, 1 Feb 2015 22:34:16 -0600 Subject: [Hallicrafters] SR-500 PROJECT WANTED Message-ID: Well I closed the shop and sold all the excess gear. I ended up with one extra PS-500. I am looking for an SR-500 project rig. Needs to have a good front panel, I can overcome almost anything else. Best Regards, Walt Cates, WD0GOF We will not be judged on what we believe, but on what we put into practice. From radio at daileyservices.com Mon Feb 2 01:06:53 2015 From: radio at daileyservices.com (radio at daileyservices.com) Date: Sun, 1 Feb 2015 23:06:53 -0700 Subject: [Hallicrafters] ELECTRIC RADIO References: Message-ID: You CAN get on their website and check the inded to see what issues held what. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com From holden7471 at msn.com Mon Feb 2 13:05:55 2015 From: holden7471 at msn.com (Howard Holden) Date: Mon, 2 Feb 2015 10:05:55 -0800 Subject: [Hallicrafters] 2015 Winter Classic Exchange phone Message-ID: The phone CX will run from 1400 UTC February 8 to 0800 UTC February 9, 2015. (9 AM Eastern Time on Sunday to 3 AM Eastern Time Monday) Call: "CQ Classic Exchange" Suggested Frequencies -- plus/minus QRM Listen up and down 5 to 10 Kc for crystal controlled stations AM 1.890 mc. 3.860 mc. 7.270 mc. 14.280 mc. 21.400 mc. 29.000 mc. 50.300 144.300 mc. SSB 1.920 mc. 3.840 mc. 7.250 mc. 14.260 mc. 21.380 mc. 28.600 mc. 50.125 mc. 144.200 mc. For full CX details, visit: http://classicexchange.org/jan15ann.html Any questions, contact me! WB2AWQ at arrl.net 73, see you this weekend! Howie WB2AWQ/7 From magnuson at mac.com Mon Feb 2 19:47:38 2015 From: magnuson at mac.com (Waldo Magnuson) Date: Tue, 03 Feb 2015 00:47:38 +0000 (GMT) Subject: [Hallicrafters] Alignment slugs stabilization Message-ID: <4b41b22e-04b2-4a90-a9b6-59f31fb8a096@me.com> Hi, Just a question on what others do to stabilize coil slugs after alignment. ?I just finished aligning a SX-28 and the slugs had moved since last time. Thanks. 73, Skip W7WGM From MLangston at pricegregory.com Mon Feb 2 20:04:57 2015 From: MLangston at pricegregory.com (Langston, Mike) Date: Mon, 2 Feb 2015 19:04:57 -0600 Subject: [Hallicrafters] Alignment slugs stabilization In-Reply-To: <4b41b22e-04b2-4a90-a9b6-59f31fb8a096@me.com> References: <4b41b22e-04b2-4a90-a9b6-59f31fb8a096@me.com> Message-ID: <3FBAE6DA-F867-4F0E-875D-71D7AFD9F471@pricegregory.com> OEM used wax. I know because of how much I have had to carefully dig out of coil forms to expose/adjust the iron powder slugs on an "original never re-aligned" h receiver. I have never replaced the wax. Just depend on friction and lack-of-transport to keep things where they are (unless you are 4x4 mobile of course)? Sent from my iPhone > On Feb 2, 2015, at 6:48 PM, Waldo Magnuson wrote: > > Hi, Just a question on what others do to stabilize coil slugs after alignment. I just finished aligning a SX-28 and the slugs had moved since last time. Thanks. > 73, 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 From hwhall at compuserve.com Mon Feb 2 20:11:44 2015 From: hwhall at compuserve.com (hwhall at compuserve.com) Date: Mon, 2 Feb 2015 20:11:44 -0500 Subject: [Hallicrafters] Alignment slugs stabilization In-Reply-To: <3FBAE6DA-F867-4F0E-875D-71D7AFD9F471@pricegregory.com> References: <4b41b22e-04b2-4a90-a9b6-59f31fb8a096@me.com> <3FBAE6DA-F867-4F0E-875D-71D7AFD9F471@pricegregory.com> Message-ID: <8D20D658240A9B9-1150-F33A@webmail-vm119.sysops.aol.com> >OEM used wax. I believe that natural bee's wax is usually recommended versus paraffin or candle type wax, because it's supposed to melt at a higher temperature. Wayne WB4OGM -----Original Message----- From: Langston, Mike To: Waldo Magnuson Cc: hallicrafters Sent: Mon, Feb 2, 2015 6:05 pm Subject: Re: [Hallicrafters] Alignment slugs stabilization OEM used wax. I know because of how much I have had to carefully dig out of coil forms to expose/adjust the iron powder slugs on an "original never re-aligned" h receiver. I have never replaced the wax. Just depend on friction and lack-of-transport to keep things where they are (unless you are 4x4 mobile of course) Sent from my iPhone > On Feb 2, 2015, at 6:48 PM, Waldo Magnuson wrote: > > Hi, Just a question on what others do to stabilize coil slugs after alignment. I just finished aligning a SX-28 and the slugs had moved since last time. Thanks. > 73, 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 ______________________________________________________________ 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 cateswa at msn.com Mon Feb 2 20:14:57 2015 From: cateswa at msn.com (Walt Cates) Date: Mon, 2 Feb 2015 19:14:57 -0600 Subject: [Hallicrafters] Re; Alignment slug Message-ID: Hi Skip, It depends upon how loose the slug is. Bee's wax or paraffin wax thinly applied to the slug works if it is not too loose. For a real loose one cut a rubber band in two. Insert it into the core until it reaches the bottom, insert the slug and tune it to the proper place then snip the excess at the bottom and top. I have also had good luck with a length of waxed flat lacing cord done the same way as the rubber band. Waxed floss works well also. Best Regards, Walt Cates, WD0GOF We will not be judged on what we believe, but on what we put into practice. From bcarling at cfl.rr.com Wed Feb 4 08:24:39 2015 From: bcarling at cfl.rr.com (bcarling at cfl.rr.com) Date: Wed, 04 Feb 2015 08:24:39 -0500 Subject: [Hallicrafters] ANNOUNCEMENT Message-ID: <54D21D97.20882.47B0055@bcarling.cfl.rr.com> The Novice Rig Roundup starts in two days! Starting Friday evening at 7 pm EST. A whole week from 0000z on FEBRUARY 7 through 0000z February 14th. Complete details here: http://NoviceRigRoundup.com Make SKEDS through the usual means at K3UK, Facebook NRR Group, Yahoo NRR Group etc. Everyone is welcome! 73 de AF4K, Bry From magnuson at mac.com Thu Feb 5 16:13:51 2015 From: magnuson at mac.com (Waldo Magnuson) Date: Thu, 05 Feb 2015 21:13:51 +0000 (GMT) Subject: [Hallicrafters] Way off topic - Pin-out for King KR-80 adf. Message-ID: Hi, ?Sorry for the off topic but I know several of you are fliers and probably some do a bit of work on avionics. ?I'm looking for a pin-out for a King KR-80 ADF which I have had kicking around for a while. ?I'd like to see it it works. Thanks. Skip W7WGM From gharmon at idworld.net Thu Feb 5 22:35:41 2015 From: gharmon at idworld.net (Gary H. Harmon, Jr.) Date: Thu, 5 Feb 2015 21:35:41 -0600 Subject: [Hallicrafters] Still Need a GK 500 Rear Door Message-ID: My requirement still exists for a Globe King 500C rear door. If you have one to sell or trade, please let me know. 73, Gary H. Harmon, Jr. - K5JWK - HAM Radio Archaeologist 6003 Archwood San Antonio, TX 78239-1504 210.657.1549h / 210.884.6926c/t gharmon (at) idworld.net Too many projects - Not enough time! "Retirement = Every day is a Saturday except Sunday" http://www.grissomroadcoc.org From jeff at podengo.com Sun Feb 8 22:01:17 2015 From: jeff at podengo.com (Jeff) Date: Sun, 08 Feb 2015 22:01:17 -0500 Subject: [Hallicrafters] SX-117 info Message-ID: <54D822FD.4050202@podengo.com> All -- Looking for some first hand knowledge. I just picked up a SX-117 with matching speaker. After replacing three tubes, and doing a cursory alignment, I am VERY happy with this new rig. I have a point of concern however -- it seems like the power transformer runs quite hot. My digital thermometer reads 149 degrees F after about 30 minutes of operation. It doesn't appear to go past that, so I suppose that is a good thing. I'd appreciate anyone's thoughts or experiences on that. I will hook it to a bucking transformer to bring the AC input down to 110 and see how that goes. Second, the tuning dial has a bit of a slip in it. It's only momentary, and not reproducible at any specific point. It also seems to diminish after the radio has heated up. While it isn't a problem now, if it is something that can easily be addressed I'd like to deal with it before it becomes a catastrophic failure. I believe the one I have is the "E" revision. I have the original manual. Any recommendations that will improve longevity or performance are greatly appreciated. Jeff WB3JIH From w5jo at brightok.net Sun Feb 8 22:14:03 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Sun, 8 Feb 2015 21:14:03 -0600 Subject: [Hallicrafters] SX-117 info In-Reply-To: <54D822FD.4050202@podengo.com> References: <54D822FD.4050202@podengo.com> Message-ID: According to the information I have the input voltage design was for 105-125 volts AC so that should not be a big concern. What may be more of a concern is leakage of the electrolytic capacitors in the power supply or any others that are in the set. The transformer should be adequate for the receiver and will run warm. Be sure the capacitors are in good condition and look for any other improper drain on the HV. Jim W5JO -----Original Message----- Looking for some first hand knowledge. I just picked up a SX-117 with matching speaker. After replacing three tubes, and doing a cursory alignment, I am VERY happy with this new rig. I have a point of concern however -- it seems like the power transformer runs quite hot. My digital thermometer reads 149 degrees F after about 30 minutes of operation. It doesn't appear to go past that, so I suppose that is a good thing. I'd appreciate anyone's thoughts or experiences on that. I will hook it to a bucking transformer to bring the AC input down to 110 and see how that goes. Second, the tuning dial has a bit of a slip in it. It's only momentary, and not reproducible at any specific point. It also seems to diminish after the radio has heated up. While it isn't a problem now, if it is something that can easily be addressed I'd like to deal with it before it becomes a catastrophic failure. I believe the one I have is the "E" revision. I have the original manual. Any recommendations that will improve longevity or performance are greatly appreciated. Jeff WB3JIH From k1lky68 at gmail.com Sun Feb 8 22:19:59 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Sun, 8 Feb 2015 22:19:59 -0500 Subject: [Hallicrafters] SX-117 info In-Reply-To: <54D822FD.4050202@podengo.com> References: <54D822FD.4050202@podengo.com> Message-ID: On Feb 8, 2015, at 10:01 PM, Jeff wrote: > ...I just picked up a SX-117 with matching speaker. ... it seems like the power transformer runs quite hot. Did you replace or reform the filter caps? If the caps are ok, then running the thing on lower line voltage will help a lot. Also: if you really don?t need all the audio power it will deliver, increase the cathode resistor to reduce the plate current. > Second, the tuning dial has a bit of a slip in it. Not familiar with this particular radio but does it use a dial string? If so, dissolve some rosin (from the violin supply store, or the baseball department of the sports store) in painters alcohol. Apply a bit to the string where it goes over the driving shaft. Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 From alf_fisher at tiscali.co.uk Mon Feb 9 02:32:13 2015 From: alf_fisher at tiscali.co.uk (Alf Fisher) Date: Mon, 9 Feb 2015 07:32:13 -0000 Subject: [Hallicrafters] SX-117 info References: <54D822FD.4050202@podengo.com> Message-ID: Jeff, Another thing you could check is the voltage on the cathode pin 7 of the output stage V12 across the 120 ohm resistor R79. The manual quotes 3.6 volts so if there is excessive current flowing, that voltage will be higher. The coupling capacitor C96 (known here as 'That capacitor') is only a 1nF so not usually troublesome but depends on the make and type. If capacitors in that location are leaky, they will cause the grid volts to go positive causing increased plate current and the likelihood of damaging the output transformer. 73, Alf G3WSD ----- Previous Message ----- > According to the information I have the input voltage design was for > 105-125 volts AC so that should not be a big concern. What may be more of > a concern is leakage of the electrolytic capacitors in the power supply or > any others that are in the set. > > The transformer should be adequate for the receiver and will run warm. Be > sure the capacitors are in good condition and look for any other improper > drain on the HV. > > Jim > > W5JO > > -----Original Message----- > Looking for some first hand knowledge. I just picked up a SX-117 with > matching speaker. After replacing three tubes, and doing a cursory > alignment, I am VERY happy with this new rig. > > I have a point of concern however -- it seems like the power transformer > runs quite hot. My digital thermometer reads 149 degrees F after about > 30 minutes of operation. It doesn't appear to go past that, so I > suppose that is a good thing. I'd appreciate anyone's thoughts or > experiences on that. I will hook it to a bucking transformer to bring > the AC input down to 110 and see how that goes. > > Second, the tuning dial has a bit of a slip in it. It's only momentary, > and not reproducible at any specific point. It also seems to diminish > after the radio has heated up. While it isn't a problem now, if it is > something that can easily be addressed I'd like to deal with it before > it becomes a catastrophic failure. > > I believe the one I have is the "E" revision. I have the original > manual. Any recommendations that will improve longevity or performance > are greatly appreciated. > > Jeff > WB3JIH > > > ______________________________________________________________ > 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 --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From hallicrafterssr2000 at k9axn.com Mon Feb 9 10:19:46 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Mon, 9 Feb 2015 09:19:46 -0600 Subject: [Hallicrafters] SX-117 info In-Reply-To: <54D822FD.4050202@podengo.com> References: <54D822FD.4050202@podengo.com> Message-ID: Hi Jeff, The dial slip is fairly common in the SX-117 and SR-150. Both use a friction pinch method where the dial is slipped in a pinch pulley for coupling. Make sure the tuning cap is free and lubed and clean the pinch mechanism. If your radio is the "E" level you might read the posts regarding the personalities of the various levels and decide where you want to go with the radio: the most current level is not necessarily the best performer. The K9AXN web site has schematics representing all of the levels. They will tell you what level you are at. Do not replace any of the paper LOOKING capacitors with ceramic. They are General Instruments film capacitors that are probably as good today as 50 years ago. Also, they are film for a reason especially on the band width switch. It's a common mistake to turn the radio over and mistake the film caps for the notorious Black Beauty caps and replace them with ceramic. If you plan to keep the radio and make it the superb instrument that it can be, read the posts on this and the QTH reflector. There also is a well written article in Electric radio that addressed some design issues: check it out. Good luck Kindest regards Jim K9AXN -----Original Message----- From: Jeff Sent: Sunday, February 08, 2015 9:01 PM To: hallicrafters Subject: [Hallicrafters] SX-117 info All -- Looking for some first hand knowledge. I just picked up a SX-117 with matching speaker. After replacing three tubes, and doing a cursory alignment, I am VERY happy with this new rig. I have a point of concern however -- it seems like the power transformer runs quite hot. My digital thermometer reads 149 degrees F after about 30 minutes of operation. It doesn't appear to go past that, so I suppose that is a good thing. I'd appreciate anyone's thoughts or experiences on that. I will hook it to a bucking transformer to bring the AC input down to 110 and see how that goes. Second, the tuning dial has a bit of a slip in it. It's only momentary, and not reproducible at any specific point. It also seems to diminish after the radio has heated up. While it isn't a problem now, if it is something that can easily be addressed I'd like to deal with it before it becomes a catastrophic failure. I believe the one I have is the "E" revision. I have the original manual. Any recommendations that will improve longevity or performance are greatly appreciated. Jeff WB3JIH ______________________________________________________________ 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 kkeller1 at comcast.net Mon Feb 9 10:31:22 2015 From: kkeller1 at comcast.net (Kurt Keller) Date: Mon, 09 Feb 2015 10:31:22 -0500 Subject: [Hallicrafters] S38s For Sale Message-ID: <54D8D2CA.3060204@comcast.net> A friend of mine has asked to me list for sale 60 assorted S38s, S38As and S38Bs that he purchased over the years with the intent of restoring, but health issues will not make that feasible. The condition of these is a mix of parts units up to good ones. Also a small number of caps and tubes included. This is a pickup only and they are located in Newtown CT. $450.00 takes all of it. Suggest you call and we can discuss. I have pictures. Kurt Keller 203-431-9740 From hallicrafterssr2000 at k9axn.com Tue Feb 10 17:41:24 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Tue, 10 Feb 2015 16:41:24 -0600 Subject: [Hallicrafters] SR-2000 SR-400 Receive schematic Message-ID: Good afternoon, The following link is to an SR-2000 schematic that has the receive logic and data paths color coded. It will work with the SR-400 and SR-400A as well. Some parts are different from the SR-400 series but it is 95% useful for those radios. It will make a quite complex logic scheme simple to diagnose or understand. The transmit version will follow soon as well as feature circuit schematics. Please let me know if there is anything you would like added. http://www.k9axn.com/sr2000/SR2000%203302009%2051F%2003%2009%202014.pdf Kindest regards Jim K9AXN From hallicrafterssr2000 at k9axn.com Fri Feb 13 18:11:25 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Fri, 13 Feb 2015 17:11:25 -0600 Subject: [Hallicrafters] Updated SR-2000 and SR-400 6.5Mc alignment proceedure Message-ID: <8DDB79FBB6CD4B8DA396068DB002A2C6@LILESJLAPTOP> This is a link to the complete service note. http://www.k9axn.com/_mgxroot/page_10761.html Kindest Regards Jim K9AXN This is the short version. Hallicrafters SR-2000 and SR-400 6.5Mc I.F. alignment procedure. Since I keyed this up in a conversation on another site, I thought it prudent to share it here as well. It describes a simplified procedure to align the 6.5Mc 1st IF system in the SR-2000 and SR-400 transceivers; one of the most difficult adjustments to get right. The Hallicrafters factory alignment process used sweep analysis to adjust broadband amplifiers and has historically been very difficult and tricky. There are three methods to align broadband I.F systems. Sweep alignment, sweep alignment using swamping, and the following method which is far simpler, and just as precise as either sweep technique. There are two links, this one and the second, a photo that says more than the words. There are two retired sweep techniques following this link that have been retained for educational purposes. If you haven?t tried sweep analysis for broadband filters try it. It is an interesting and educational experience. However, you can get it right with very little effort using the following method. NOTE: The following simplified procedure can be used on any broadband filter that uses tight coupling to broaden the band width. Please read the entire note before proceeding. FOR THE SR-2000, DO NOT APPLY THE HIGH VOLTAGE AND FOR THE SR-400, DISCONNECT THE SCREEN! 1. Remove V12 the Heterodyne oscillator tube. 2. Band switch 14Mc. 3. Frequency dial 14.050Mc. 4. Scope probe 10X on V11AP2 for the SR-2000 and V11AP7 for the SR-400 and SR-400A. We will be looking for 6.0Mc to 6.5Mc at 3V PEV. 5. Set Tune mode. 6. Go to transmit. Don?t worry about Xmit RF settings. Also, don?t worry about plate current in the SR-400?s. With the screen disconnected, there will be none. 7. Adjust T1 and T2 top and bottom slugs for peak. 8. Set frequency dial to 14.450Mc 9. Repeat step 7 noting which slugs need adjustment. 10. Set frequency dial back to 14.050. 11. Repeat step 7 at 14.050 and 14.450 until the peaks occur at both ends without the need for further adjustment. 12. If you have been successful you will measure approximately 3 volts PEV on V11P2 for the SR-2000 and V11AP7 for the SR-400 and SR-400A. Tune from 0 to 500Kc, end to end. The signal should not exceed 3db of ripple in or at the band edges. NOTE: Walt Cates had a difficult time with the procedure and offered the following suggestion. Back all of the slugs from both T1 and T2 out to the coil edge. Then begin by turning all of the slugs in one turn at a time until there is a measureable response. Then peak both slugs in T1 simultaneously, then T2 until they are all peaked. Then repeat step 7 at both ends of the band to verify they peak equally at 14.050MC and 14.450Mc. Take care not to go beyond the peak. This will result in the slug moving into the space between coils. If it does, alignment will be impossible. The reason for this behavior is the transformer has two windings each with a slug. You can turn a slug in so far that it moves beyond its coil into the area of the second coil. It will peak at one end of the band and fail at the other if this happens. Both slugs must be on the outside of their respective coils, not between, or alignment will be Impossible because the coupling will be totally distorted. You may wonder what we just did. That broad band system is designed to be 500Kc wide with 3db skirts using tight coupling, and a 2200 ohm resistor across each coil winding. Tight coupling causes the output to look like a Bats wing and the resistor further flattens the shape. The resultant wave shape rises at the beginning droops in the center and rises again at the other end. See the photo. What you just accomplished is to peak the wave shape at the ends of the bats wings, 14.050Mc and 14.450Mc which are the locations of the high points of the peak ? droop - peak shape. The link to the photo clearly points this out. NOTE: You can do a complete transmit alignment on the SR-2000 including neutralization without applying the high voltage and on the SR-400 after detaching the screen. With the screen detached in the SR-400, there will be no plate current. This will enable you to do protracted alignment while not harming the finals. Simply make a copper shield about one inch long that fits snugly around the 12BY7A and do not allow it to touch ground. Silver solder a one inch length of wire to the shield so that you can connect a scope probe without it melting from the heat. Attach a 10X scope probe to the ungrounded copper shield and set the scope to 1 volt/division. Use this setup to measure the results rather than the transmit output. The SR-2000 in tune mode will measure approximately 20 to 25 volts PEP with the transmit RF drive set fully clock wise. The SR-400 will measure approximately 45 volts same conditions. In both cases these measurements represent adequate drive to saturate the finals. Hope you have found this of interest and if it lacks clarity please send a note so I might correct it. ? COPYRIGHT James Liles K9AXN From bcarling at cfl.rr.com Sat Feb 14 08:43:20 2015 From: bcarling at cfl.rr.com (bcarling at cfl.rr.com) Date: Sat, 14 Feb 2015 08:43:20 -0500 Subject: [Hallicrafters] FS: Tubes Message-ID: <54DF50F8.18722.A16588@bcarling.cfl.rr.com> FOR SALE: Pair of EIMAC 35T tubes in excellent condition - they look new $20.00 QTY 1 RCA 813 transmitting tube - new in box - $35.00 QTY 1 - 837/VT-101 RCA Transmitting Tube - NEW IN BOX - $12.00 QTY 2 EIMAC 4-65A Transmitting Tubes, NEW (one in box) - $70.00 for the pair QTY 1 General Electric 6146B TUBE, used excellent - $12.00 QTY 1 TUNG SOL 5881 TUBE, used VG - $8.00 QTY 1 RCA 5V4 TUBE, used VG - $5.00 QTY 1 RCA 5Z3 TUBE, used VG - $3.00 QTY 1 RCA 6DQ5 TUBE, used VG - $3.00 Shipping additional E-mail me for details or to arrange purchase. 73 de AF4K, Bry From bcarling at cfl.rr.com Sat Feb 14 14:33:35 2015 From: bcarling at cfl.rr.com (bcarling at cfl.rr.com) Date: Sat, 14 Feb 2015 14:33:35 -0500 Subject: [Hallicrafters] FS: B & W Coaxial Antenna Switches Message-ID: <54DFA30F.12251.1E20FE1@bcarling.cfl.rr.com> FOR SALE: Two BARKER and Williamson 6-position Antenna Switches. One SO-239 connector for the coaxial input and SIX SO-239 connections for the antennas. These are both the rectangular, in-line switches with all connectors exiting off the rear. No awkward round box to mount or other issues. Fairly common and well known design. They typically sell for around $35 - $45 or more on eBay. Real ceramic construction inside and in excellent condition. They have some markings and show some normal use, but no dents or gouges. Tested and working fine. Both look more or less identical. E-mail me if you need to see pictures. One is the Model CS-6G and the other is a model 595. Both are made by B & W and look more or less identical. Available for only $26.00 each plus shipping. E-mail if you need details or pictures. 73 - Brian, AF4K From hallicrafterssr2000 at k9axn.com Sat Feb 14 16:35:55 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sat, 14 Feb 2015 15:35:55 -0600 Subject: [Hallicrafters] SX-115 and HT-32B question In-Reply-To: <14b89080752-3ca1-19d85@webprd-m21.mail.aol.com> References: <14b89080752-3ca1-19d85@webprd-m21.mail.aol.com> Message-ID: <47A19FDAA04B4FF0A2BA78591E0460BE@LILESJLAPTOP> Hi Lee, Valentines day so tomorrows the day. For the band pass problem I have an answer but need to collect my notes from 1971. Had some correspondence with the Hal guys regarding the SX-115 that addresses this issue including a fix. Have to articulate it properly or the nut cases will need a sedative. Also need to roll it by the reflectors if you don?t mind. Kindest regards Jim K9AXN -----Original Message----- From: kc9cdt at aol.com Sent: Saturday, February 14, 2015 10:59 AM To: hallicrafterssr2000 at k9axn.com Subject: SX-115 and HT-32B question Jim, Today I am having a ball with my SX-115/HT32-B. A question please for each: SX-115 seems to hear USB and LSB ...example...on 40 Mtrs, tune in a nice signal on LSB, without touching dial, change to USB...I can still hear the signal fine even though it is not as loud?? Problem or just alignment? HT-32B tune up on 80M 3820, DSB or CW... max carrier out is 15 watts, BUT on SSB 120 watts peak out while talking loud or whistling?? Alignment? Thanks, 73, Lee Lee Simmonds Summit DCS LLC 260-799-4077 Office 260-403-6936 Cell From rbethman at comcast.net Sat Feb 14 16:40:36 2015 From: rbethman at comcast.net (rbethman) Date: Sat, 14 Feb 2015 16:40:36 -0500 Subject: [Hallicrafters] SX-115 and HT-32B question In-Reply-To: <47A19FDAA04B4FF0A2BA78591E0460BE@LILESJLAPTOP> References: <14b89080752-3ca1-19d85@webprd-m21.mail.aol.com> <47A19FDAA04B4FF0A2BA78591E0460BE@LILESJLAPTOP> Message-ID: <54DFC0D4.3000702@comcast.net> The HT-32s only do about 15 to 20W AM(DSB). If you push it to the wall, it WILL distort the audio. SSB will do 100 - 120W. normal. Regards, Bob - N0DGN On 2/14/2015 4:35 PM, Jim Liles wrote: > Hi Lee, > > Valentines day so tomorrows the day. For the band pass problem I have an answer but need to collect my notes from 1971. Had some correspondence with the Hal guys regarding the SX-115 that addresses this issue including a fix. Have to articulate it properly or the nut cases will need a sedative. Also need to roll it by the reflectors if you don?t mind. > > Kindest regards Jim K9AXN > > -----Original Message----- > From: kc9cdt at aol.com > Sent: Saturday, February 14, 2015 10:59 AM > To: hallicrafterssr2000 at k9axn.com > Subject: SX-115 and HT-32B question > > > Jim, > Today I am having a ball with my SX-115/HT32-B. > > A question please for each: > > SX-115 seems to hear USB and LSB ...example...on 40 Mtrs, tune in a nice signal on LSB, without touching dial, change to USB...I can still hear the signal fine even though it is not as loud?? Problem or just alignment? > > HT-32B tune up on 80M 3820, DSB or CW... max carrier out is 15 watts, BUT on SSB 120 watts peak out while talking loud or whistling?? Alignment? > > Thanks, > 73, > Lee > > Lee Simmonds > Summit DCS LLC > > 260-799-4077 Office > 260-403-6936 Cell From thompson at mindspring.com Sat Feb 14 17:03:30 2015 From: thompson at mindspring.com (Dave Thompson) Date: Sat, 14 Feb 2015 17:03:30 -0500 (GMT-05:00) Subject: [Hallicrafters] SR-150 Manual Message-ID: <9140244.1423951410968.JavaMail.root@elwamui-rustique.atl.sa.earthlink.net> From dfischer at usol.com Sat Feb 14 23:05:27 2015 From: dfischer at usol.com (Duane Fischer, W8DBF) Date: Sat, 14 Feb 2015 23:05:27 -0500 Subject: [Hallicrafters] Magic Link Message-ID: <001c01d048d5$5835d020$fc54e8cc@hpdc5100mt> OT - Hi All, My appologies for not posting the URL for my two Magic videos currently on youtube. The first one shows me at a school filmed by NBC and me performing live (unedited!) at an auditorium. The second part of this video shows me being featured by PBS on a program called Michigan Magazine. The second video is an amusing interview and two full length Magic segments done live on a major cable network. The host is Ted Johnson, now deceased. He was a well known talk show host for many years here in southeast lower MI on AM 910 WFDF. I truly hope that you enjoy both videos. Search either duane fischer or the amazing duane fischer. Duane Fischer, W8DBF - WPE8CXO E-Mail: dfischer at usol.com Hallicrafters web site: www.w9wze.net HHRP web site: hhrp.w9wze.net ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2247 / Virus Database: 4257/7984 - Release Date: 10/31/14 Internal Virus Database is out of date. From dfischer at usol.com Sat Feb 14 23:06:34 2015 From: dfischer at usol.com (Duane Fischer, W8DBF) Date: Sat, 14 Feb 2015 23:06:34 -0500 Subject: [Hallicrafters] Magic Link Message-ID: <001e01d048d5$59fd49b0$fc54e8cc@hpdc5100mt> OT - Hi All, My appologies for not posting the URL for my two Magic videos currently on youtube. The first one shows me at a school filmed by NBC and me performing live (unedited!) at an auditorium. The second part of this video shows me being featured by PBS on a program called Michigan Magazine. The second video is an amusing interview and two full length Magic segments done live on a major cable network. The host is Ted Johnson, now deceased. He was a well known talk show host for many years here in southeast lower MI on AM 910 WFDF. I truly hope that you enjoy both videos. Search either duane fischer or the amazing duane fischer. Duane Fischer, W8DBF - WPE8CXO E-Mail: dfischer at usol.com Hallicrafters web site: www.w9wze.net HHRP web site: hhrp.w9wze.net ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2247 / Virus Database: 4257/7984 - Release Date: 10/31/14 Internal Virus Database is out of date. From kf9wv at att.net Sat Feb 14 19:21:05 2015 From: kf9wv at att.net (george frost) Date: Sat, 14 Feb 2015 16:21:05 -0800 Subject: [Hallicrafters] SX-101A Message-ID: <1423959665.24778.YahooMailNeo@web180905.mail.ne1.yahoo.com> I recently picked up a SX-101A that has a short that was traced to the 2nd converter chassis.I have never removed one but looking for some guidance by someone that has repaired the converter. Any info would be great...George KF9WV From mark.k3msb at gmail.com Sat Feb 14 19:24:57 2015 From: mark.k3msb at gmail.com (Mark K3MSB) Date: Sat, 14 Feb 2015 19:24:57 -0500 Subject: [Hallicrafters] SX-101A In-Reply-To: <1423959665.24778.YahooMailNeo@web180905.mail.ne1.yahoo.com> References: <1423959665.24778.YahooMailNeo@web180905.mail.ne1.yahoo.com> Message-ID: I removed one a few years ago; this may help you. http://www.k3msb.com/sx101a/subconverter/writeup.html 73 Mark K3MSB On Sat, Feb 14, 2015 at 7:21 PM, george frost wrote: > I recently picked up a SX-101A that has a short that was traced to the 2nd > converter chassis.I have never removed one but looking for some guidance by > someone that has repaired the converter. Any info would be great...George > KF9WV > ______________________________________________________________ > 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 k1lky68 at gmail.com Sat Feb 14 22:55:49 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Sat, 14 Feb 2015 22:55:49 -0500 Subject: [Hallicrafters] SX-101A In-Reply-To: <1423959665.24778.YahooMailNeo@web180905.mail.ne1.yahoo.com> References: <1423959665.24778.YahooMailNeo@web180905.mail.ne1.yahoo.com> Message-ID: <4A13424B-BE01-45E1-9DD4-A597C4280E2A@gmail.com> On Feb 14, 2015, at 7:21 PM, george frost wrote: > I recently picked up a SX-101A that has a short that was traced to the 2nd converter chassis.I have never removed one but looking for some guidance by someone that has repaired the converter. Any info would be great...George KF9WV George, The website posted will get you on your way with the 2nd converter chassis. I did not read it in detail, but make sure your MARK EVERY WIRE you take out, especially the coax wires, so you can get them back in the right spots. In reviewing my notes on the radio I discovered posts from a fellow who had ?peaked the 50.5 kc IF by ear?. DO NOT DO THIS. You either need an accurate signal generator, or a stable one with a frequency counter, or a swept oscillator with good marker generators to do that alignment. It?s best to just leave the thing alone. Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 From f6fmt at orange.fr Sun Feb 15 09:38:24 2015 From: f6fmt at orange.fr (F6FMT) Date: Sun, 15 Feb 2015 15:38:24 +0100 Subject: [Hallicrafters] Hallicrafters Digest, Vol 133, Issue 4 In-Reply-To: References: Message-ID: <004c01d0492d$0e610660$2b231320$@fr> Hello from France, I'm in need of a readable manual and schematic for a SR-150 I have received some days ago.. Not working.. Only the OB-2 lights.. 73's Gerard F6FMT support at ccae.info http://www.ccae.info From k1lky68 at gmail.com Sun Feb 15 10:43:52 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Sun, 15 Feb 2015 10:43:52 -0500 Subject: [Hallicrafters] Hallicrafters Digest, Vol 133, Issue 4 In-Reply-To: <004c01d0492d$0e610660$2b231320$@fr> References: <004c01d0492d$0e610660$2b231320$@fr> Message-ID: <93DA8AAB-F2E5-4303-AD21-587FBB639114@gmail.com> On Feb 15, 2015, at 9:38 AM, F6FMT wrote: > Hello from France, > > I'm in need of a readable manual and schematic for a SR-150 I have received > some days ago.. Gerard, Download the manuals from here: http://bama.edebris.com/manuals/hallicra/sr150/ There you will also find later versions of the schematic, and service bulletins. Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 From hallicrafterssr2000 at k9axn.com Sun Feb 15 22:35:00 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sun, 15 Feb 2015 21:35:00 -0600 Subject: [Hallicrafters] SX-115 and HT-32B question In-Reply-To: <14b89080752-3ca1-19d85@webprd-m21.mail.aol.com> References: <14b89080752-3ca1-19d85@webprd-m21.mail.aol.com> Message-ID: <21E308D2C495450CA16238B49F00F65A@LILESJLAPTOP> Good morning Lee, The symptoms that you describe are not well documented but appeared in the late 60?s when the chassis heaters began to fail. The heater in the SX-115 is more for the components used rather than the VFO because it has a drift correction adjustment that is simple to manipulate. The problem that you describe happened when you unplugged the radio or the heater failed causing the internals to cool. When you powered the radio up, the temperature change over the first hour heated the ceramic capacitors in the band pass filter. The ceramic capacitors used were a design problem. Read on. The Hallicrafters guys made one of two profound mistakes during the tubed era that jump out at me. The first follows. I believe the SX-115 was designed before the SX-117 by a year or two and the SX-117 is part of the story. The SX-115 was the flagship and the SX-117 was supposedly the poor man?s copy. One of their engineers apparently decided that the capacitors used in the BAND PASS FILTER circuits of the SX-115 could be ceramic class 3, Z5U capacitors. Every engineering or design document explicitly warned that their use in tuned circuits, timers, and analog applications were patently poor design practices. Hal ignored or missed this warning and went ahead with them anyway. How they missed is a mystery because the SX-115 is the only radio designed with the 50Kc I.F. system that used the ceramic capacitors. The SX-100 Mark2 and SX-117 used expensive General instruments film capacitors. The SX-88, SX-76, SX101, SX-96, and early SX-100?s used film or paper capacitors that did not have the instability with voltage or temperature that the Z5U has. The Hal engineer chose .01 and .0047uf 10% ceramic Z5U capacitors to fit out the BAND WIDTH switch. Note: The SX-115 is the only 50Kc I.F. radio ever built by Hal using the ceramic Z5U caps to implement the Band width logic. This was a mistake as you will see below. If it were not for the under chassis heater failing, the error might have gone unnoticed. Why is the Z5U a bad choice? The ceramic Z5U is one of the most non-linear, volatile ceramic capacitors available. The schematic calls for a 10% Z5U ceramic disc capacitor. What does the 10% mean? It says that at room temperature, the capacity will be within 10% of the stated value ---- DISREGARDING APPLIED VOLTAGE which has a profound influence on capacity. All bets are off when voltage is applied, and with AC the capacity begins to vary at less than 1 volt. This would cause linearity problems, not obviously perceptible. The vast change in capacity with temperature however will cause the center point in each of the band width positions to shift. Data sheet information for the Z5U. The Z and 5 are the low and high charted limits of temperature which are +10 to +85 degrees C. The U states that the capacity will vary from +22% to ?56% over the temperature range. That?s the charted range. Anything beyond will vary radically more. The Polypropylene film capacitors vary less than 2% over a wider temp range and the capacity does not vary with voltage whereas the capacity of the Z5U will vary up to 60% over the voltage range. Last, the Class 3 ceramic capacitors age loosing approximately 3% of their capacity each decade; the film caps do not age. HOW THE SWITCH LOGIC WORKS: The .5Kc position: The capacitors on the band width switch control the position of the filters center point and the resistors flatten the response. Example: The .5Kc position shorts around all of the capacitors. This is the unaltered center of the band pass and the point that you aligned first. It is 50.75Kc and is 500 cycles wide. This covers 50.500Kc to 50.1000Kc at the 6db point with the carrier at 50.000 Kc. The 6db audio band pass is from 500 cycles to 1000 cycles. The 1Kc position: Introduces all of the capacitors paralleled on the switch in series with the fixed cap reducing the effective capacity moving the band pass center upward and removes the short around, increasing the center frequency to 51.000Kc but does not add resistors yet. However the change from short to capacitors does widen the band pass to 1Kc. This expands the audio band pass to 500 and 1500 cycles. The 2Kc Position: Removes a .01uf capacitor moving the center point to 51.500Kc and adds a 180 ohm resistor widening the band pass to 2Kc, creating a band pass from 50.500Kc to 52.500Kc at 6db rendering an audio band pass of 500 to 2500 cycles. The 3Kc position: Removes the .0047uf capacitor moving the band center to 52.000Kc and adds a 220 ohm resistor rendering a band pass from 50.500Kc to 53.500Kc for an audio band pass of 500 to 3500 cycles. The 5Kc position: removes the last .01uf cap re-inserts the .0047uf capacitor and adds a 390 ohm resistor. This moves the band center to 53.000Kc and widens the band pass to 5Kc creating a band pass of 50.500 Kc to 55.500Kc. Audio 500 to 5500 cycles. The above paragraph says it all as to why the Z5U is a design error. The variation in capacity with temperature and voltage disqualifies it. The band width center positions will not remain where they should be using the ceramic capacitors. I hope this helps and hope you change those caps out for Polypropylene. That is a fine instrument --- keep it that way. Kindest regards Jim K9AXN --------------------Original Message-------------------------- From: kc9cdt at aol.com Sent: Saturday, February 14, 2015 10:59 AM To: hallicrafterssr2000 at k9axn.com Subject: SX-115 and HT-32B question Jim, Today I am having a ball with my SX-115/HT32-B. A question please for each: SX-115 seems to hear USB and LSB ...example...on 40 Mtrs, tune in a nice signal on LSB, without touching dial, change to USB...I can still hear the signal fine even though it is not as loud?? Problem or just alignment? HT-32B tune up on 80M 3820, DSB or CW... max carrier out is 15 watts, BUT on SSB 120 watts peak out while talking loud or whistling?? Alignment? Thanks, 73, Lee Lee Simmonds Summit DCS LLC 260-799-4077 Office 260-403-6936 Cell From anchor at ec.rr.com Mon Feb 16 11:01:00 2015 From: anchor at ec.rr.com (Al Parker) Date: Mon, 16 Feb 2015 11:01:00 -0500 Subject: [Hallicrafters] SX-115 selectivity In-Reply-To: <21E308D2C495450CA16238B49F00F65A@LILESJLAPTOP> References: <14b89080752-3ca1-19d85@webprd-m21.mail.aol.com> <21E308D2C495450CA16238B49F00F65A@LILESJLAPTOP> Message-ID: <54E2143C.6050408@ec.rr.com> Hi jim, Many thanks for the discussion of the SX-115 selectivity ckt. My greatly challenged ears have been questioning my SX-115's selectivity recently. It gets used on the Vintage Sideband Net as a net ctrl every Sun. at 2 PM ET, and with recent propagation and QRM (some intentional), selectivity has been needed. But there's little, if any, difference between the 2, 3, & 5 kc posns. I've mentioned it on the net, and now it's time to get some proper caps and get it back to proper spec. 2 slightly OT items: 1. I'm slowly wkg on getting my (new) SR-2000 ready for net activity. 2. Brad, NB9M, has secured a domain name and is working on a website for the Vintage Sideband Net. It's under construction, so check back often. thanks, 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 2/15/2015 10:35 PM, Jim Liles wrote: > Good morning Lee, > > The symptoms that you describe are not well documented but appeared in the late 60?s when the chassis heaters began to fail. The heater in the SX-115 is more for the components used rather than the VFO because it has a drift correction adjustment that is simple to manipulate. > > The problem that you describe happened when you unplugged the radio or the heater failed causing the internals to cool. When you powered the radio up, the temperature change over the first hour heated the ceramic capacitors in the band pass filter. The ceramic capacitors used were a design problem. Read on. > > > The Hallicrafters guys made one of two profound mistakes during the tubed era that jump out at me. The first follows. > > I believe the SX-115 was designed before the SX-117 by a year or two and the SX-117 is part of the story. The SX-115 was the flagship and the SX-117 was supposedly the poor man?s copy. > > One of their engineers apparently decided that the capacitors used in the BAND PASS FILTER circuits of the SX-115 could be ceramic class 3, Z5U capacitors. Every engineering or design document explicitly warned that their use in tuned circuits, timers, and analog applications were patently poor design practices. Hal ignored or missed this warning and went ahead with them anyway. How they missed is a mystery because the SX-115 is the only radio designed with the 50Kc I.F. system that used the ceramic capacitors. The SX-100 Mark2 and SX-117 used expensive General instruments film capacitors. The SX-88, SX-76, SX101, SX-96, and early SX-100?s used film or paper capacitors that did not have the instability with voltage or temperature that the Z5U has. > > The Hal engineer chose .01 and .0047uf 10% ceramic Z5U capacitors to fit out the BAND WIDTH switch. Note: The SX-115 is the only 50Kc I.F. radio ever built by Hal using the ceramic Z5U caps to implement the Band width logic. This was a mistake as you will see below. > > If it were not for the under chassis heater failing, the error might have gone unnoticed. Why is the Z5U a bad choice? > > The ceramic Z5U is one of the most non-linear, volatile ceramic capacitors available. The schematic calls for a 10% Z5U ceramic disc capacitor. What does the 10% mean? It says that at room temperature, the capacity will be within 10% of the stated value ---- DISREGARDING APPLIED VOLTAGE which has a profound influence on capacity. All bets are off when voltage is applied, and with AC the capacity begins to vary at less than 1 volt. This would cause linearity problems, not obviously perceptible. The vast change in capacity with temperature however will cause the center point in each of the band width positions to shift. > > Data sheet information for the Z5U. The Z and 5 are the low and high charted limits of temperature which are +10 to +85 degrees C. The U states that the capacity will vary from +22% to ?56% over the temperature range. That?s the charted range. Anything beyond will vary radically more. > > The Polypropylene film capacitors vary less than 2% over a wider temp range and the capacity does not vary with voltage whereas the capacity of the Z5U will vary up to 60% over the voltage range. Last, the Class 3 ceramic capacitors age loosing approximately 3% of their capacity each decade; the film caps do not age. > > HOW THE SWITCH LOGIC WORKS: > > The .5Kc position: The capacitors on the band width switch control the position of the filters center point and the resistors flatten the response. Example: The .5Kc position shorts around all of the capacitors. This is the unaltered center of the band pass and the point that you aligned first. It is 50.75Kc and is 500 cycles wide. This covers 50.500Kc to 50.1000Kc at the 6db point with the carrier at 50.000 Kc. The 6db audio band pass is from 500 cycles to 1000 cycles. > > The 1Kc position: Introduces all of the capacitors paralleled on the switch in series with the fixed cap reducing the effective capacity moving the band pass center upward and removes the short around, increasing the center frequency to 51.000Kc but does not add resistors yet. However the change from short to capacitors does widen the band pass to 1Kc. This expands the audio band pass to 500 and 1500 cycles. > > The 2Kc Position: Removes a .01uf capacitor moving the center point to 51.500Kc and adds a 180 ohm resistor widening the band pass to 2Kc, creating a band pass from 50.500Kc to 52.500Kc at 6db rendering an audio band pass of 500 to 2500 cycles. > > The 3Kc position: Removes the .0047uf capacitor moving the band center to 52.000Kc and adds a 220 ohm resistor rendering a band pass from 50.500Kc to 53.500Kc for an audio band pass of 500 to 3500 cycles. > > The 5Kc position: removes the last .01uf cap re-inserts the .0047uf capacitor and adds a 390 ohm resistor. This moves the band center to 53.000Kc and widens the band pass to 5Kc creating a band pass of 50.500 Kc to 55.500Kc. Audio 500 to 5500 cycles. > > The above paragraph says it all as to why the Z5U is a design error. The variation in capacity with temperature and voltage disqualifies it. The band width center positions will not remain where they should be using the ceramic capacitors. > > I hope this helps and hope you change those caps out for Polypropylene. That is a fine instrument --- keep it that way. > > Kindest regards Jim K9AXN > From pratt at knology.net Mon Feb 16 11:27:09 2015 From: pratt at knology.net (K4PRF - Burton Pratt) Date: Mon, 16 Feb 2015 10:27:09 -0600 Subject: [Hallicrafters] Slow starting SR-160 Message-ID: <54E21A5D.1010300@knology.net> This little transceiver has been sitting on the shelf for nearly twenty years and I finally decided to try to bring it back to life. I have replaced all of the electrolytic capacitors including the 30, 30, 10 multiple can. I have three PS-150 power supplies which I use with other rigs in the SR series which have been updated and work fine. After a normal cold start of about two minutes with all the heaters on and the meter settling to the left it takes about another ten minutes for the little three bander to wake up. Then the receiver and transmitter works fine. I am thinking that the oscillator is slow starting. I know. Check the tubes, pin voltages etc. Tubes are good. It is practically impossible to safely check the voltages from the bottom and I have some test sockets ordered so I can check from the top. Another clue is that the crystal calibrator and the VFO are also off until it decides to wake up. I have had several contacts with the little Hallcrafter and the reports have been good both signal and audio. I still have more trouble shooting to do including touching up the alignment but thought some you might have run across something like this. Any ideas? Burt Pratt K4PRF From davemarquart at gmail.com Tue Feb 17 12:06:54 2015 From: davemarquart at gmail.com (Dave Marquart) Date: Tue, 17 Feb 2015 09:06:54 -0800 Subject: [Hallicrafters] rough S-37 Message-ID: I found a "rough" S-37 that was on the way to the scrap heap. I hate to see rigs go like that.. Has all major parts, transformers, caps, choke. No S meter. Dial moves. Knobs are not original. Missing some pots. Rust spots. I This is a parts unit. I paid $20. That is your cost. You need to ship. I am currently in San Diego and we can work something out here. Email OR Call please. 208 559 4747 I can get pictures to you off line. 73. Dave. W7VT >From my cell -- Dave Marquart 3100 E Victory Rd Meridian, ID 83642 208 559-4747 cell davemarquart at gmail.com From brian at lessonsinlutherie.com Tue Feb 17 16:54:46 2015 From: brian at lessonsinlutherie.com (Brian Burns) Date: Tue, 17 Feb 2015 13:54:46 -0800 Subject: [Hallicrafters] Rolled gears? Message-ID: Hello All, Somewhere in the back of my memory, about 1955, the salesman in a ham radio store in Oakland (Alameda?) said that Hallicrafters had come up with a method of making no-backlash gears by forming the teeth by rolling one gear against the other---hard steel against aluminum? Does anyone know anything about this, or was it just another urban myth? The latest model in the showroom sure had silky feeling main and bandspread controls. Cheers, Brian --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From cateswa at msn.com Wed Feb 18 11:15:07 2015 From: cateswa at msn.com (Walt Cates) Date: Wed, 18 Feb 2015 10:15:07 -0600 Subject: [Hallicrafters] SR cases Message-ID: I have two SR-160 cases with good paint. Also one SR-150 case, needs repaint. The 150 case has top cover but not the bottom cover. Your choice $20 plus shipping each. Best Regards, Walt Cates, WD0GOF Humility is not a process of putting yourself down, it is a process of raising others up. From kf9wv at att.net Wed Feb 18 13:59:59 2015 From: kf9wv at att.net (george frost) Date: Wed, 18 Feb 2015 10:59:59 -0800 Subject: [Hallicrafters] SX-101A Message-ID: <1424285999.30832.YahooMailNeo@web180905.mail.ne1.yahoo.com> Anyone have the Electric radio article on aligning the sx-101a? I think it is #199. Just need the article only...Thanks...George From kf9wv at att.net Wed Feb 18 14:47:06 2015 From: kf9wv at att.net (george frost) Date: Wed, 18 Feb 2015 11:47:06 -0800 Subject: [Hallicrafters] sx-101a Message-ID: <1424288826.71231.YahooMailNeo@web180902.mail.ne1.yahoo.com> There was more than one article about the SX-101A and I need to know the issues besides the #199....George From k1lky68 at gmail.com Wed Feb 18 17:01:21 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Wed, 18 Feb 2015 17:01:21 -0500 Subject: [Hallicrafters] sx-101a In-Reply-To: <1424288826.71231.YahooMailNeo@web180902.mail.ne1.yahoo.com> References: <1424288826.71231.YahooMailNeo@web180902.mail.ne1.yahoo.com> Message-ID: <019CCEAD-3B2B-4A83-9E99-ED98C04FF14B@gmail.com> On Feb 18, 2015, at 2:47 PM, george frost wrote: > There was more than one article about the SX-101A and I need to know the issues besides the #199?.George There is a search for Electric Radio at: http://www.radiolabworks.com/ersearch.html However, it refuses to work for me because it?s not a ?trusted application? or some such thing. I don?t have the patience today to figure out what to do. Sorry. Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 From manualman at juno.com Wed Feb 18 17:10:57 2015 From: manualman at juno.com (manualman at juno.com) Date: Wed, 18 Feb 2015 17:10:57 -0500 Subject: [Hallicrafters] sx-101a Message-ID: See this: http://www.radiolabworks.com/ersearch_help.pdf Pete, wa2cwa On Wed, 18 Feb 2015 17:01:21 -0500 Roy Morgan writes: > > On Feb 18, 2015, at 2:47 PM, george frost wrote: > > > There was more than one article about the SX-101A and I need to > know the issues besides the #199 .George > > There is a search for Electric Radio at: > > http://www.radiolabworks.com/ersearch.html > > However, it refuses to work for me because it?s not a ?trusted > application? or some such thing. > > I don?t have the patience today to figure out what to do. Sorry. > > Roy > > > Roy Morgan > RoyMorgan at alum.mit.edu > K1LKY Since 1958 From k1lky68 at gmail.com Wed Feb 18 18:43:33 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Wed, 18 Feb 2015 18:43:33 -0500 Subject: [Hallicrafters] sx-101a In-Reply-To: References: Message-ID: <411B4F92-B298-47CB-846D-443F8D43C6C0@gmail.com> On Feb 18, 2015, at 5:10 PM, manualman at juno.com wrote: > See this: > http://www.radiolabworks.com/ersearch_help.pdf > > Pete, wa2cwa Pete, Thanks for the link to the ersearch_help.pdf file. I read it, followed the directions, and managed to get my Java system to allow the search engine to run. An added benefit is that now when I run into other blocked sites, I?ll know what to do. (Wouldn?t it be nice for the Java mavens to add an ?Add this site to my Exceptions Site List? button? But maybe that would weaken the intended security features.) To Don, keeper of the index: Thank you kindly for all your efforts over the years to keep this index alive and well. I am using an Apple MacBook computer running Mac OSX 10.9.5 I was able to follow the instructions easily and get the thing to run just fine. I suspect that the Java Control Panel is the same for whatever operating system a user might have. Hooray for genuine cross platform capability! (There was a small glitch: some spaces showed up in one of the URL?s I copied from the help file to my Exceptions Site List, and I don?t know how that happened. But it was easy to fix.) I did try to copy and paste the list of articles from the search for ?SX-101A? in the Article column, and found that to not be not possible, even with copy-and-paste field by field. So for those interested in all the articles, here it is, transcribed from the the search results window: Article Author Issue Date Page S-Meter Problem, A Solution to an (SX-101A) Brown 110 June-98 18 Making SX-101A Reproduction Tuning Knobs Langston 195 Aug-05 29 The SX-101A, Hallicrafters? Heavyweight Champion, Pa Oserwald 196 Sept-05 25 SX-101A, Hallicrafters? Heavyweight Champion, Part 2 Osterwald 197 Oct-05 38 SX-101A, Hallicrafters? Heavyweight Champion, Part 3 Osterwald 198 Nov-05 38 SX-101A, Hallicrafters? Heavyweight Champion, Part 4 Osterwald 199 Dec-05 39 Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 From anchor at ec.rr.com Wed Feb 18 19:50:39 2015 From: anchor at ec.rr.com (Al Parker) Date: Wed, 18 Feb 2015 19:50:39 -0500 Subject: [Hallicrafters] sx-101a In-Reply-To: <019CCEAD-3B2B-4A83-9E99-ED98C04FF14B@gmail.com> References: <1424288826.71231.YahooMailNeo@web180902.mail.ne1.yahoo.com> <019CCEAD-3B2B-4A83-9E99-ED98C04FF14B@gmail.com> Message-ID: <54E5335F.7030204@ec.rr.com> Here's another less invasive (I hope) place to search the ER index. But, ER is a small business endeavor, maybe on the verge of hobby business. I suggest you contact Ray Osterwald at ER and purchase the back issue you want. He did a great series on the rebuild of the SX-101's, I wasn't aware of something on alignments. 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 2/18/2015 5:01 PM, Roy Morgan wrote: > > On Feb 18, 2015, at 2:47 PM, george frost wrote: > >> There was more than one article about the SX-101A and I need to know the issues besides the #199?.George > > There is a search for Electric Radio at: > > http://www.radiolabworks.com/ersearch.html > > However, it refuses to work for me because it?s not a ?trusted application? or some such thing. > > I don?t have the patience today to figure out what to do. Sorry. > > Roy > > > Roy Morgan > RoyMorgan at alum.mit.edu > K1LKY Since 1958 > > ______________________________________________________________ > 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 Wed Feb 18 20:07:50 2015 From: hallicrafters at mailman.qth.net (Lee via Hallicrafters) Date: Wed, 18 Feb 2015 20:07:50 -0500 Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR Message-ID: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com> Hi everyone, Well, the Halli HT-32B is on the air. After many years of sleeping. Changed the Electrolytics, 3 Black Beauty's. and the Bias diode (was selenium). Also, someone before me had already SS the HV and B+. Also had to adj. the carrier balance. Working pretty darn good and WOW it is easy to tune-up. One issue has surfaced...last night I was on 7139 LSB of course...and a guy came on and said I was 20 over on 7142 (above my freq) I had several look at my signal and said it looked OK. But one had a Flex 1500 and helped me out. He said I was about 5KC wide and my signal went away at 7141.5 and went away at 7135.5. I turned the Mic gain down some (to 2.0) and he said it was a little better but still pretty wide. Today I had a couple guys on 7131 check it out as well and 4 KC was the width....I do realize these old crystal filters did not have straight skirts. What should be expected on this TX as far as bandwidth and interference to neighbors?? What has other experienced? 73, Lee, KC9CDT From magnuson at mac.com Wed Feb 18 20:29:01 2015 From: magnuson at mac.com (Waldo Magnuson) Date: Thu, 19 Feb 2015 01:29:01 +0000 (GMT) Subject: [Hallicrafters] FS: SX-28A Message-ID: <63281265-1c10-4a50-b1f3-a36e8c367728@me.com> For Sale: Hallicrafters SX-28A , s/n HA-53241 (with A on front panel) with case. Electrolytic and ?paper caps and some resistors replaced. ?Aligned. Good reception. $200 plus shipping (wt. about 80 lbs.). Will deliver up to 300 miles for fuel costs. 73, Skip W7WGM Spokane, WA 99208 From manualman at juno.com Wed Feb 18 20:27:06 2015 From: manualman at juno.com (manualman at juno.com) Date: Wed, 18 Feb 2015 20:27:06 -0500 Subject: [Hallicrafters] sx-101a Message-ID: The link doesn't work, and even if it did, the Index only goes up to 1999. Don stopped providing a download link many years ago. Pete, wa2cwa On Wed, 18 Feb 2015 19:50:39 -0500 Al Parker writes: > Here's another less invasive (I hope) place to search the ER index. > > But, ER is a small business endeavor, maybe on the verge of > hobby > business. I suggest you contact Ray Osterwald at ER and purchase > the > back issue you want. He did a great series on the rebuild of the > SX-101's, I wasn't aware of something on alignments. > 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 2/18/2015 5:01 PM, Roy Morgan wrote: > > > > On Feb 18, 2015, at 2:47 PM, george frost wrote: > > > >> There was more than one article about the SX-101A and I need to > know the issues besides the #199 .George > > > > There is a search for Electric Radio at: > > > > http://www.radiolabworks.com/ersearch.html > > > > However, it refuses to work for me because it?s not a ?trusted > application? or some such thing. > > > > I don?t have the patience today to figure out what to do. Sorry. > > > > Roy > > > > > > Roy Morgan > > RoyMorgan at alum.mit.edu > > K1LKY Since 1958 > > > > ______________________________________________________________ > > 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 airwolves373 at cox.net Thu Feb 19 06:59:48 2015 From: airwolves373 at cox.net (Ron Gibbar) Date: Thu, 19 Feb 2015 04:59:48 -0700 Subject: [Hallicrafters] Hallicrafters SX-28A or sx17 Message-ID: <000001d04c3b$8facc3b0$af064b10$@cox.net> looking to purchase a unit if anyone has one to pass along. 200+- dollar budget, Tucson AZ thx everyone. Ron Gibbar From magnuson at mac.com Fri Feb 20 01:04:34 2015 From: magnuson at mac.com (Waldo Magnuson) Date: Thu, 19 Feb 2015 22:04:34 -0800 Subject: [Hallicrafters] SX-28A sold Message-ID: Thanks to all that responded to my for sale ad - it was an avalanche of emails. It sold and now I have the task of packing and shipping. Skip W7WGM From ka1kaq at gmail.com Fri Feb 20 10:29:37 2015 From: ka1kaq at gmail.com (Todd, KA1KAQ) Date: Fri, 20 Feb 2015 10:29:37 -0500 Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR In-Reply-To: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com> References: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com> Message-ID: On Wed, Feb 18, 2015 at 8:07 PM, Lee via Hallicrafters < hallicrafters at mailman.qth.net> wrote: > > What should be expected on this TX as far as bandwidth and interference to > neighbors?? > I can't comment on anything specific to the transmitter Lee, but I don't think it's a big problem considering the timeframe. As a clue, I'd point to the Collins SSB mechnical filters which were 3.5 KHz wide as I recall. Folks with newer rigs, especially those not around or involved with radio then, are more likely to expect a cookie-cutter result ala Yaecomwood plastic radios. In the sense of spectrum management, today's rigs are certainly better. The irony is, crowding on the bands doesn't seem to be an issue anymore, just 'frequency ownership' issues for "nets" (directed roundtable QSOs) and corntesting, of course. Congrats on bringing the old rig back to the bands. ~ Todd, KA1KAQ/4 From hallicrafterssr2000 at k9axn.com Fri Feb 20 11:23:35 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Fri, 20 Feb 2015 10:23:35 -0600 Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR In-Reply-To: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com> References: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com> Message-ID: <4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> Hi Lee, Check 7-16.3. It indicates 650 cycles to 3000 cycles @3db --- say nothing about shape factor. Describes how to adjust the center point as well. Don?t know what the shape factor for the 9Mc filters was at the time. Anyone know how many poles were in the filter That begs a question. Why did they change their strategy to phasing in the HT37 rather than crystal. The phasing system has by design, broader skirts than crystal. Maybe they had a problem with the 9 Mc filters of the day. Might be interesting th try a modern 9Mc crystal filter. Anyone have internal correspondence with the Hal guys or design notes regarding the Ht-32B? Kindest regards Jim K9AXN -----Original Message----- From: Lee via Hallicrafters Sent: Wednesday, February 18, 2015 7:07 PM To: hallicrafters at mailman.qth.net Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR Hi everyone, Well, the Halli HT-32B is on the air. After many years of sleeping. Changed the Electrolytics, 3 Black Beauty's. and the Bias diode (was selenium). Also, someone before me had already SS the HV and B+. Also had to adj. the carrier balance. Working pretty darn good and WOW it is easy to tune-up. One issue has surfaced...last night I was on 7139 LSB of course...and a guy came on and said I was 20 over on 7142 (above my freq) I had several look at my signal and said it looked OK. But one had a Flex 1500 and helped me out. He said I was about 5KC wide and my signal went away at 7141.5 and went away at 7135.5. I turned the Mic gain down some (to 2.0) and he said it was a little better but still pretty wide. Today I had a couple guys on 7131 check it out as well and 4 KC was the width....I do realize these old crystal filters did not have straight skirts. What should be expected on this TX as far as bandwidth and interference to neighbors?? What has other experienced? 73, Lee, KC9CDT ______________________________________________________________ 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 Fri Feb 20 11:37:59 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Fri, 20 Feb 2015 10:37:59 -0600 Subject: [Hallicrafters] Fluted wrenches Message-ID: Service note: If you are going to remove the small knobs on the Hallicrafters radios, or are going to re-time the VFO on the SR-2000, 400, or 400A you will be using a small 4 flute wrench. There are two sizes that will fit into the set screws. A .069? and a .076? 4 flute wrench. The .069 will remove these screws if they are not tight. If tight, you will think that you stripped the set screw. Not so, the .076? wrench is the right size and will work. Do not use the .069? wrench! If you are working on the SR series VFO back lash or other gears, buy the Xcelite four flute .076? wrench. It is in a screwdriver handle and is 4? long --- a life saver. They also have all of the other flute sizes for the handle. Kindest regards Jim K9AXN From anchor at ec.rr.com Fri Feb 20 13:10:04 2015 From: anchor at ec.rr.com (Al Parker) Date: Fri, 20 Feb 2015 13:10:04 -0500 Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR In-Reply-To: <4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> References: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com> <4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> Message-ID: <54E7787C.2030905@ec.rr.com> Hi Jim, Lee, et al, IIRC from old info from un-remembered sources, the main reason Halli brought out the HT-37 was to reduce costs, both to the mfgr and to the customer. I'm sure the phasing SB generator was cheaper to mfgr than the filter type, filters replaced by diodes, resistors, etc. Plus the cheapened the panel & case, plus??. One thing that seems to have been a problem with the HT-32 is that they are very easy to overdrive with audio, and thus produce very wide splatter. Can't remember if the HT-37 has the same problem, but probably. Lee said he turned the mic gain down to 2 and thought it was better. I had the same problem with my HT-32, don't remember what I used to set the gain to, but it was very low, with an unamplified mic (Astatic 10-D). Occasionally I'd get complaints, but usually cuz the gain was up a bit. I installed a published AGC mod to the rig abt 2 yrs ago (don't remember now the source, but will gladly dig it up and fwd to anyone concerned), and now run the gain at 4, with no (more) complaints from nearby adjacent net folks on crowded 20m on Sun. PM's. All said, I don't know what the specs were, but if anyone has info, pse share it with us all. 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 2/20/2015 11:23 AM, Jim Liles wrote: > Hi Lee, > > Check 7-16.3. It indicates 650 cycles to 3000 cycles @3db --- say nothing about shape factor. Describes how to adjust the center point as well. Don?t know what the shape factor for the 9Mc filters was at the time. Anyone know how many poles were in the filter > > That begs a question. Why did they change their strategy to phasing in the HT37 rather than crystal. The phasing system has by design, broader skirts than crystal. Maybe they had a problem with the 9 Mc filters of the day. Might be interesting th try a modern 9Mc crystal filter. > > Anyone have internal correspondence with the Hal guys or design notes regarding the Ht-32B? > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Lee via Hallicrafters > Hi everyone, > Well, the Halli HT-32B is on the air. After many years of sleeping. > Changed the Electrolytics, 3 Black Beauty's. and the Bias diode (was selenium). > Also, someone before me had already SS the HV and B+. > Also had to adj. the carrier balance. > > Working pretty darn good and WOW it is easy to tune-up. > > One issue has surfaced...last night I was on 7139 LSB of course...and a guy came on and said I was 20 over on 7142 (above my freq) > I had several look at my signal and said it looked OK. But one had a Flex 1500 and helped me out. He said I was about 5KC wide and my signal went away at 7141.5 and went away at 7135.5. > > I turned the Mic gain down some (to 2.0) and he said it was a little better but still pretty wide. > Today I had a couple guys on 7131 check it out as well and 4 KC was the width....I do realize these old crystal filters did not have straight skirts. > > What should be expected on this TX as far as bandwidth and interference to neighbors?? > What has other experienced? > 73, > Lee, KC9CDT > From elespe at lisco.com Fri Feb 20 13:16:14 2015 From: elespe at lisco.com (Paul Kraemer) Date: Fri, 20 Feb 2015 12:16:14 -0600 Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR In-Reply-To: <4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> References: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com> <4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> Message-ID: <749D0E29E3D549E1A733767B63FA5D5B@PaulKraemerPC> Jim, Lee, et al I had one back in 65 and never had reports like that If anything they felt it was too sharp You may need to align that crystal filter I did that and then got A#1 reports of nice audio Alignment CAN be done with audio signal generator, s meter and patience Of course, may have a bad xtal too. Better start with audio proof using the audio generator I don't have any notes on the rig or results. Basically just rock the audio generator through the 300 to 3khz range, note how each adjustment affected what and worked for smooth even response monitoring s meter on the Drake 1A Some old ads or tech review in QST would likely tell more about the filter. I think the 32 to 37 downgrades were an economy measure. Paul K0UYA -----Original Message----- From: Jim Liles Sent: Friday, February 20, 2015 10:23 AM To: kc9cdt at aol.com ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Hallicrafters HT-32B ON THE AIR Hi Lee, Check 7-16.3. It indicates 650 cycles to 3000 cycles @3db --- say nothing about shape factor. Describes how to adjust the center point as well. Don?t know what the shape factor for the 9Mc filters was at the time. Anyone know how many poles were in the filter That begs a question. Why did they change their strategy to phasing in the HT37 rather than crystal. The phasing system has by design, broader skirts than crystal. Maybe they had a problem with the 9 Mc filters of the day. Might be interesting th try a modern 9Mc crystal filter. Anyone have internal correspondence with the Hal guys or design notes regarding the Ht-32B? Kindest regards Jim K9AXN -----Original Message----- From: Lee via Hallicrafters Sent: Wednesday, February 18, 2015 7:07 PM To: hallicrafters at mailman.qth.net Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR Hi everyone, Well, the Halli HT-32B is on the air. After many years of sleeping. Changed the Electrolytics, 3 Black Beauty's. and the Bias diode (was selenium). Also, someone before me had already SS the HV and B+. Also had to adj. the carrier balance. Working pretty darn good and WOW it is easy to tune-up. One issue has surfaced...last night I was on 7139 LSB of course...and a guy came on and said I was 20 over on 7142 (above my freq) I had several look at my signal and said it looked OK. But one had a Flex 1500 and helped me out. He said I was about 5KC wide and my signal went away at 7141.5 and went away at 7135.5. I turned the Mic gain down some (to 2.0) and he said it was a little better but still pretty wide. Today I had a couple guys on 7131 check it out as well and 4 KC was the width....I do realize these old crystal filters did not have straight skirts. What should be expected on this TX as far as bandwidth and interference to neighbors?? What has other experienced? 73, Lee, KC9CDT ______________________________________________________________ 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 elespe at lisco.com Fri Feb 20 13:20:45 2015 From: elespe at lisco.com (Paul Kraemer) Date: Fri, 20 Feb 2015 12:20:45 -0600 Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR In-Reply-To: <54E7787C.2030905@ec.rr.com> References: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com><4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> <54E7787C.2030905@ec.rr.com> Message-ID: <081CFC231B894856975A6E1B9C0E5C66@PaulKraemerPC> There was a simple mod to the 32 described in QST that added a diode which gave a very nice alc to the rig. I implemented that after constantly figiting with the mic gain. It worked fantastic after that. I could go from close talking the mic to being across the room and the output was good. Wish I could remember the details but do remember it was very simple like add a diode between two points Paul -----Original Message----- From: Al Parker Sent: Friday, February 20, 2015 12:10 PM To: Jim Liles ; kc9cdt at aol.com ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] Hallicrafters HT-32B ON THE AIR Hi Jim, Lee, et al, IIRC from old info from un-remembered sources, the main reason Halli brought out the HT-37 was to reduce costs, both to the mfgr and to the customer. I'm sure the phasing SB generator was cheaper to mfgr than the filter type, filters replaced by diodes, resistors, etc. Plus the cheapened the panel & case, plus??. One thing that seems to have been a problem with the HT-32 is that they are very easy to overdrive with audio, and thus produce very wide splatter. Can't remember if the HT-37 has the same problem, but probably. Lee said he turned the mic gain down to 2 and thought it was better. I had the same problem with my HT-32, don't remember what I used to set the gain to, but it was very low, with an unamplified mic (Astatic 10-D). Occasionally I'd get complaints, but usually cuz the gain was up a bit. I installed a published AGC mod to the rig abt 2 yrs ago (don't remember now the source, but will gladly dig it up and fwd to anyone concerned), and now run the gain at 4, with no (more) complaints from nearby adjacent net folks on crowded 20m on Sun. PM's. All said, I don't know what the specs were, but if anyone has info, pse share it with us all. 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 2/20/2015 11:23 AM, Jim Liles wrote: > Hi Lee, > > Check 7-16.3. It indicates 650 cycles to 3000 cycles @3db --- say nothing > about shape factor. Describes how to adjust the center point as well. > Don?t know what the shape factor for the 9Mc filters was at the time. > Anyone know how many poles were in the filter > > That begs a question. Why did they change their strategy to phasing in > the HT37 rather than crystal. The phasing system has by design, broader > skirts than crystal. Maybe they had a problem with the 9 Mc filters of > the day. Might be interesting th try a modern 9Mc crystal filter. > > Anyone have internal correspondence with the Hal guys or design notes > regarding the Ht-32B? > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Lee via Hallicrafters > Hi everyone, > Well, the Halli HT-32B is on the air. After many years of sleeping. > Changed the Electrolytics, 3 Black Beauty's. and the Bias diode (was > selenium). > Also, someone before me had already SS the HV and B+. > Also had to adj. the carrier balance. > > Working pretty darn good and WOW it is easy to tune-up. > > One issue has surfaced...last night I was on 7139 LSB of course...and a > guy came on and said I was 20 over on 7142 (above my freq) > I had several look at my signal and said it looked OK. But one had a Flex > 1500 and helped me out. He said I was about 5KC wide and my signal went > away at 7141.5 and went away at 7135.5. > > I turned the Mic gain down some (to 2.0) and he said it was a little > better but still pretty wide. > Today I had a couple guys on 7131 check it out as well and 4 KC was the > width....I do realize these old crystal filters did not have straight > skirts. > > What should be expected on this TX as far as bandwidth and interference to > neighbors?? > What has other experienced? > 73, > Lee, KC9CDT > ______________________________________________________________ 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 anchor at ec.rr.com Fri Feb 20 13:39:08 2015 From: anchor at ec.rr.com (Al Parker) Date: Fri, 20 Feb 2015 13:39:08 -0500 Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR In-Reply-To: <081CFC231B894856975A6E1B9C0E5C66@PaulKraemerPC> References: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com><4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> <54E7787C.2030905@ec.rr.com> <081CFC231B894856975A6E1B9C0E5C66@PaulKraemerPC> Message-ID: <54E77F4C.8030800@ec.rr.com> ALC mod + others, CQ mag, Feb. 1965, pg 65. I'll fwd the article to anyone who wants it (a bit later this PM). 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 2/20/2015 1:20 PM, Paul Kraemer wrote: > There was a simple mod to the 32 described in QST that added a diode > which gave a very nice alc to the rig. > I implemented that after constantly figiting with the mic gain. > It worked fantastic after that. > I could go from close talking the mic to being across the room and the > output was good. > Wish I could remember the details but do remember it was very simple > like add a diode between two points > Paul > > -----Original Message----- From: Al Parker > Sent: Friday, February 20, 2015 12:10 PM > To: Jim Liles ; kc9cdt at aol.com ; hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] Hallicrafters HT-32B ON THE AIR > > Hi Jim, Lee, et al, > IIRC from old info from un-remembered sources, the main reason Halli > brought out the HT-37 was to reduce costs, both to the mfgr and to the > customer. I'm sure the phasing SB generator was cheaper to mfgr than > the filter type, filters replaced by diodes, resistors, etc. Plus the > cheapened the panel & case, plus??. > One thing that seems to have been a problem with the HT-32 is that they > are very easy to overdrive with audio, and thus produce very wide > splatter. Can't remember if the HT-37 has the same problem, but > probably. Lee said he turned the mic gain down to 2 and thought it was > better. I had the same problem with my HT-32, don't remember what I > used to set the gain to, but it was very low, with an unamplified mic > (Astatic 10-D). Occasionally I'd get complaints, but usually cuz the > gain was up a bit. > I installed a published AGC mod to the rig abt 2 yrs ago (don't > remember now the source, but will gladly dig it up and fwd to anyone > concerned), and now run the gain at 4, with no (more) complaints from > nearby adjacent net folks on crowded 20m on Sun. PM's. > All said, I don't know what the specs were, but if anyone has info, pse > share it with us all. > 73, > > Al, W8UT From dhallam at knology.net Fri Feb 20 14:17:10 2015 From: dhallam at knology.net (David C. Hallam) Date: Fri, 20 Feb 2015 14:17:10 -0500 Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR In-Reply-To: <4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> References: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com> <4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> Message-ID: <54E78836.8040808@knology.net> List, All I have is a note from Robert Orwin that the carrier oscillator should be adjusted to provide -6db at 400 Hz. He said not to drive it over about 95W on 40M. At about 100W, it will start to flat top. David KW4DH On 2/20/2015 11:23 AM, Jim Liles wrote: > Hi Lee, > > Check 7-16.3. It indicates 650 cycles to 3000 cycles @3db --- say nothing about shape factor. Describes how to adjust the center point as well. Don?t know what the shape factor for the 9Mc filters was at the time. Anyone know how many poles were in the filter > > That begs a question. Why did they change their strategy to phasing in the HT37 rather than crystal. The phasing system has by design, broader skirts than crystal. Maybe they had a problem with the 9 Mc filters of the day. Might be interesting th try a modern 9Mc crystal filter. > > Anyone have internal correspondence with the Hal guys or design notes regarding the Ht-32B? > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Lee via Hallicrafters > Sent: Wednesday, February 18, 2015 7:07 PM > To: hallicrafters at mailman.qth.net > Subject: [Hallicrafters] Hallicrafters HT-32B ON THE AIR > > > Hi everyone, > Well, the Halli HT-32B is on the air. After many years of sleeping. > Changed the Electrolytics, 3 Black Beauty's. and the Bias diode (was selenium). > Also, someone before me had already SS the HV and B+. > Also had to adj. the carrier balance. > > Working pretty darn good and WOW it is easy to tune-up. > > One issue has surfaced...last night I was on 7139 LSB of course...and a guy came on and said I was 20 over on 7142 (above my freq) > I had several look at my signal and said it looked OK. But one had a Flex 1500 and helped me out. He said I was about 5KC wide and my signal went away at 7141.5 and went away at 7135.5. > > I turned the Mic gain down some (to 2.0) and he said it was a little better but still pretty wide. > Today I had a couple guys on 7131 check it out as well and 4 KC was the width....I do realize these old crystal filters did not have straight skirts. > > What should be expected on this TX as far as bandwidth and interference to neighbors?? > What has other experienced? > 73, > Lee, KC9CDT > > > > ______________________________________________________________ > 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 > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5646 / Virus Database: 4293/9150 - Release Date: 02/20/15 -- 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: 2015.0.5646 / Virus Database: 4293/9150 - Release Date: 02/20/15 From k9dtc at comcast.net Sun Feb 22 12:43:04 2015 From: k9dtc at comcast.net (Dan Cotsirilos) Date: Sun, 22 Feb 2015 11:43:04 -0600 Subject: [Hallicrafters] Hallicrafters HT-32B TRANSFORMER FOR SALE In-Reply-To: <54E78836.8040808@knology.net> References: <14b9f60664b-3ca1-28ce2@webprd-m21.mail.aol.com><4140FC1334FE4B6EB878337D1AF88340@LILESJLAPTOP> <54E78836.8040808@knology.net> Message-ID: Brand new still in sealed carton Peter Dahl transformer for the HT-32B from 2004. $75 plus shipping. Dan K9DTC From gsteffens at bevcomm.net Sun Feb 22 16:53:31 2015 From: gsteffens at bevcomm.net (Gerry Steffens) Date: Sun, 22 Feb 2015 15:53:31 -0600 Subject: [Hallicrafters] SX-100 tuning Message-ID: <000001d04eea$001eb2b0$005c1810$@bevcomm.net> Among other things I am a Hallicrafters collector/restorer. I have 4 different SX-100s. I have a mint specimen on a shelf above the bench and use it almost daily. It is completely functional, alignment and calibration are about the best I have seen, given the dial markings (seems never off by even a full red line width). From its history, I know it has been used very little. All of these SX-100s are a little sluggish or more so in the mechanicals of tuning. I have a couple of other radios with the flywheel or weighted tuning and they will coast down the band given a sharp twirl. The above radio is the best of the four. If one serviced the gearing, do these radios perform as some others, needing almost no effort in tuning and coasting down the dial given a sharp twirl? I am attempting to decide whether to go in after the gear train. Thanks, Gerry Gerald L Steffens P.E. Oronoco MN Radio Historian, collecting & restoring E.H. Scott, Heath, McMurdo Silver, Hallicrafters, National, Zenith Transoceanic & any other interesting radios & classic Oldsmobiles Collections stand at about 300 radios, 5 Oldsmobiles & a 1950 GMC long bed 1/2 ton From k1lky68 at gmail.com Sun Feb 22 17:48:54 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Sun, 22 Feb 2015 17:48:54 -0500 Subject: [Hallicrafters] SX-100 tuning In-Reply-To: <000001d04eea$001eb2b0$005c1810$@bevcomm.net> References: <000001d04eea$001eb2b0$005c1810$@bevcomm.net> Message-ID: <096446C6-DD2B-4384-89FA-4FAFB378AA6B@gmail.com> On Feb 22, 2015, at 4:53 PM, Gerry Steffens wrote: > I have 4 different SX-100s. ... > All of these SX-100s are a little sluggish or more so in the mechanicals of tuning. ... If one serviced the gearing, do these radios perform as some others, needing almost no effort in tuning and coasting down the dial given a sharp twirl? Gary, Yes, almost certainly they will behave differently after a complete strip down, cleaning, and re-lubrication. Some years ago I had the interesting experience of completely rebuilding an SX-88. Those radios were worth some two to three thousand dollars then, so it was worth the trouble to do it right from end to end. As received, the radio worked ok mechanically but was a bit sluggish as you mentioned. It has two complete independent gear trains, with anti-backlash gear sets throughout each train. I completely dis-assembled both gear trains, down to the bell bearings wherever I found them. After very careful cleaning, lubrication, and re-assembly the thing was a whole new radio. A modest twist of the knob would send the dial coasting pretty much from end to end of its travel. Backlash was reduced to zero, which is amazing considering all the gearing involved. The slightest movement of the tuning knob would bring an appropriate change in pitch of a BFO note. That whole process is not for the faint of heart or the impatient worker. You can lose bearings, forget which gears go where, and make goofs in setting the backlash spring tension in the anti-baklash gear sets. But it was worth it! I m not familiar with the SX-100 gearing, but I suspect at least some of the same mechanisms will be found in there. If you decide to tackle the job, I will be glad to share some tricks I learned to help get the gear loading right without tearing your hair out. Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 From hallicrafters at mailman.qth.net Sun Feb 22 18:10:30 2015 From: hallicrafters at mailman.qth.net (Doug Moore via Hallicrafters) Date: Sun, 22 Feb 2015 18:10:30 -0500 Subject: [Hallicrafters] SX-100 tuning Message-ID: <7644c.5741dfde.421bbbe6@aol.com> In a message dated 2/22/2015 4:59:35 P.M. Central Standard Time, k1lky68 at gmail.com writes: That whole process is not for the faint of heart or the impatient worker. You can lose bearings, forget which gears go where, and make goofs in setting the backlash spring tension in the anti-baklash gear sets. But it was worth it! Roy, You hit the nail on the head! Years ago I went through the same thing with an SX-28. I decided to document the process to encourage others. Google SX-28 gearbox and you will find it in two places. It is definitely worth it. 73, Doug Moore KB9TMY From cateswa at msn.com Thu Feb 26 13:30:41 2015 From: cateswa at msn.com (Walt Cates) Date: Thu, 26 Feb 2015 12:30:41 -0600 Subject: [Hallicrafters] 6146 RCA Message-ID: Reducing bench stock, all good, all tested. Matched pair 6146A Matched pair 6146B Single 6146B Single 6146 Will sell all 6 tubes as a lot for $45.00 Plus $8.00 shipping. Best Regards, Walt Cates, WD0GOF Humility is not a process of putting yourself down, it is a process of raising others up. From pratt at knology.net Fri Feb 27 14:00:03 2015 From: pratt at knology.net (K4PRF - Burton Pratt) Date: Fri, 27 Feb 2015 13:00:03 -0600 Subject: [Hallicrafters] SR-150 Low output Message-ID: <54F0BEB3.6060503@knology.net> 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 From wd4fyq at comcast.net Sat Feb 28 10:09:58 2015 From: wd4fyq at comcast.net (Dwight Haley) Date: Sat, 28 Feb 2015 10:09:58 -0500 Subject: [Hallicrafters] For Sale - Hallicrafters SX-101A In-Reply-To: References: Message-ID: Receiver has been sold! Thanks to all that expressed interest. On Fri, Oct 25, 2013 at 8:39 AM, Dwight Haley wrote: > It is time to clean house for downsizing so I am selling the SX-101A I > have had since approximately 1979. It was used while I was a novice but has > spent most of its life in the closet. It has not been powered up in several > years so it is being sold as is. > > > > Photographs can be viewed here: > > > > > http://home.comcast.net/~wd4fyq/site/?/page/Hallicrafters_Equipment_for_Sale/ > > > > Let me know if the link doesn't work and I will be happy to e-mail photos. > > > > I have the manual that came with it as shown in the photos. It is not in > the best shape as it has a drink stain and the pages are coming loose at > the middle. > > > > Asking $215.00 or best offer. Prefer local pick up or I am willing to meet > you within a reasonable distance. It is currently located in Luna Pier, > Michigan which is 6 miles north of Toledo but I travel to Lansing, Michigan > and can bring it up that way next time I go. > > > > Please let me know if you have questions or need additional information. > > > Dwight Haley > > wd4fyq > > wd4fyq at comcast.net > From james.liles at comcast.net Sat Feb 28 10:28:54 2015 From: james.liles at comcast.net (james.liles at comcast.net) Date: Sat, 28 Feb 2015 09:28:54 -0600 Subject: [Hallicrafters] Hallicrafters Digest, Vol 133, Issue 11 In-Reply-To: References: Message-ID: <310ABFD19ABB48CEA51EEBA986645851@LILESJLAPTOP> Good morning Roy, I am always interested in tips, tricks, and experiences with these radios. Please share what shortcuts or make it easy information that you have with the SX-100 gear set or anything else. May save a lot of time for us. Kindest regards Jim K9AXN Message: 2 Date: Sun, 22 Feb 2015 17:48:54 -0500 From: Roy Morgan To: Gerry Steffens Cc: hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] SX-100 tuning Message-ID: <096446C6-DD2B-4384-89FA-4FAFB378AA6B at gmail.com> Content-Type: text/plain; charset=us-ascii On Feb 22, 2015, at 4:53 PM, Gerry Steffens wrote: > I have 4 different SX-100s. ... > All of these SX-100s are a little sluggish or more so in the mechanicals of tuning. ... If one serviced the gearing, do these radios perform as some others, needing almost no effort in tuning and coasting down the dial given a sharp twirl? Gary, Yes, almost certainly they will behave differently after a complete strip down, cleaning, and re-lubrication. Some years ago I had the interesting experience of completely rebuilding an SX-88. Those radios were worth some two to three thousand dollars then, so it was worth the trouble to do it right from end to end. As received, the radio worked ok mechanically but was a bit sluggish as you mentioned. It has two complete independent gear trains, with anti-backlash gear sets throughout each train. I completely dis-assembled both gear trains, down to the bell bearings wherever I found them. After very careful cleaning, lubrication, and re-assembly the thing was a whole new radio. A modest twist of the knob would send the dial coasting pretty much from end to end of its travel. Backlash was reduced to zero, which is amazing considering all the gearing involved. The slightest movement of the tuning knob would bring an appropriate change in pitch of a BFO note. That whole process is not for the faint of heart or the impatient worker. You can lose bearings, forget which gears go where, and make goofs in setting the backlash spring tension in the anti-baklash gear sets. But it was worth it! I m not familiar with the SX-100 gearing, but I suspect at least some of the same mechanisms will be found in there. If you decide to tackle the job, I will be glad to share some tricks I learned to help get the gear loading right without tearing your hair out. Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 From pincon at erols.com Sat Feb 28 13:22:37 2015 From: pincon at erols.com (Charlie T, K3ICH) Date: Sat, 28 Feb 2015 13:22:37 -0500 Subject: [Hallicrafters] For Sale - Hallicrafters SX-71 References: Message-ID: <520E6E16520A47C2857AC146D9600E6B@pinnacle05df05> I have a good condition SX-71 receiver that has been completely restored, new caps and all out of spec resistors changed, as well as a tube check/replacement and alignment. It's not a "mint" or whatever "collector's quality" means, but it is nice, clean and working fine with all original knobs. The cabinet & panel paint is original but the lid has been repainted with the proper "silver" color. I can send pics if you'd like to see it. $250 + shipping, or I can meet a reasonable distance from the northern Virginia area. Charlie k3ICH ----- Original Message ----- From: "Dwight Haley" To: Sent: Saturday, February 28, 2015 10:09 AM Subject: Re: [Hallicrafters] For Sale - Hallicrafters SX-101A > Receiver has been sold! > > Thanks to all that expressed interest. > > On Fri, Oct 25, 2013 at 8:39 AM, Dwight Haley wrote: > >> It is time to clean house for downsizing so I am selling the SX-101A I >> have had since approximately 1979. It was used while I was a novice but >> has >> spent most of its life in the closet. It has not been powered up in >> several >> years so it is being sold as is. >> >> >> >> Photographs can be viewed here: >> >> >> >> >> http://home.comcast.net/~wd4fyq/site/?/page/Hallicrafters_Equipment_for_Sale/ >> >> >> >> Let me know if the link doesn't work and I will be happy to e-mail >> photos. >> >> >> >> I have the manual that came with it as shown in the photos. It is not in >> the best shape as it has a drink stain and the pages are coming loose at >> the middle. >> >> >> >> Asking $215.00 or best offer. Prefer local pick up or I am willing to >> meet >> you within a reasonable distance. It is currently located in Luna Pier, >> Michigan which is 6 miles north of Toledo but I travel to Lansing, >> Michigan >> and can bring it up that way next time I go. >> >> >> >> Please let me know if you have questions or need additional information. >> >> >> Dwight Haley >> >> wd4fyq >> >> wd4fyq at comcast.net >> > ______________________________________________________________ > 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 davemarquart at gmail.com Sat Feb 28 15:01:42 2015 From: davemarquart at gmail.com (Dave Marquart) Date: Sat, 28 Feb 2015 12:01:42 -0800 Subject: [Hallicrafters] S-37 parts available 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 Ant Tuning Shaft plus parts Gear Drive Assembly Fuse Holder Metal Main Tuning Dial and Indicator 33C127 Vernier Scale Top RF cover 70C607-B RF Deck with parts / some tubes All RF transformers 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 k1lky68 at gmail.com Sat Feb 28 15:03:11 2015 From: k1lky68 at gmail.com (Roy Morgan) Date: Sat, 28 Feb 2015 15:03:11 -0500 Subject: [Hallicrafters] SX-100 (and other) gear train tips In-Reply-To: <310ABFD19ABB48CEA51EEBA986645851@LILESJLAPTOP> References: <310ABFD19ABB48CEA51EEBA986645851@LILESJLAPTOP> Message-ID: On Feb 28, 2015, at 10:28 AM, james.liles at comcast.net wrote: > Good morning Roy, > > I am always interested in tips, tricks, and experiences with these radios. > Please share what shortcuts or make it easy information that you have with the SX-100 gear set or anything else. May save a lot of time for us. > Kindest regards Jim K9AXN Jim, Thanks for the invitation to share some tricks. My notes file had my notes and also other ideas from Greg posted some years ago, so here are his ideas also. These ideas follow from two phenomenon of radio nature: - It?s a little known principle of the physics of field theory that a magical and troublesome field of attraction exists between small parts such as anti back lash springs, shaft circle clips, and tiny setscrews and an unseen force that hides in unknown and inaccessible parts of the work room. Definite methods must be put in place to thwart the evil workings of this force. - Common telephone cable wire, usually No. 22 plastic covered, has so many uses that one effort to catalog them all ended in the well-meaning worker being sent to the loony bin. Only one use of such wire is mentioned here, partly in order to avoid any unpleasant influence on my mental health. From: WA1KBQ at aol.com Date: Sun, 23 Sep 2007 08:52:14 EDT Subject: Re: [Hallicrafters] SX-88 Gear Train Rebuild To: hallicrafters at mailman.qth.net In a message dated 9/18/2007 3:40:52 P.M. Atlantic Standard Time, roy.morgan at nist.gov writes: (not the current email address) Has anyone dis-assembled an SX-88 gear train? I have one to do and wonder what tricks there are to put the anti backlash into the split gears and keep it there during re-assembly. I have done a couple. It's the only way to clean and properly lubricate the bearings but they are a little tricky to get back together. When you have it apart be sure to look at all the bearing balls with a magnifying glass to see if any are flat spotted. The last one I did had this condition and needed them replaced. I was able to locate the correct size replacement bearing balls at McMaster Carr Industrial supply in Atlanta available in a box of 100. The main consideration for the SX-88 gear train is the reduction gears have to be timed so the end stop cams engage the followers at the precise time (position of gear train rotation). This will involve some trial and error (meaning disassembly and reassembly) as you try different gear tooth engagement positions to get them timed properly on both MT and BS. (Main tuning and Bandspread) It was easier for me to leave the springs out for this step and put them in after I had it right. Find a suitable pick to push them in place but be careful to have a means of containing them as they will quickly get away, fly across the room and ruin your day trying to find the little wayward spring again. These springs are not like any used in other common receivers so replacements would need to come from another SX-88. (Notes from K1LKY: 1)Passing a length of dental floss through the spring, encompassing one or two of the spring turns and having its other ends tied together and fastened SECURELY to some solid thing will prevent the springs from sproing-ing off to unknown places. 2) Judicious use of No. 22 telephone cable solid conductor wire on the split gears will allow you to set the gear train parts into position without any spring loading - the wire is wound around the gear from one side to the other and passes through the teeth of the gear with the spring compressed one tooth of rotation. Once the gear train is assembled, you can then cut the wire and remove it, allowing the springs to get into action. More than one (or MAYbe two) teeth of preloading will cause excessive friction and rough feel to the gear train. THOROUGH cleaning and greasing of the ball bearings and LIGHT oiling of the matching faces of the split gears and sleeve bearings will result in a system that has NO backlash and a very light touch in operation.) Also, be careful of the preload on the shaft end bearings, apply just enough to accomplish zero end play. This adjustment *may* change when the receiver heats up - it would be a fine point to check this after a thorough warm up period. When the SX-88 reduction gear train is clean and adjusted properly and sparingly lubricated in the right places there are none finer when you give that silky smooth flywheel weighted knob a spin down the band, and then tune back and forth through a steady carrier in CW mode. 73, Greg Further tips on the ball bearings and gears: - If you discover flattened, rusted, or mis-shapen balls in the mechanism, it will be worthwhile to get new replacements. Replacing all of the balls in one set is advised to avoid trouble from the new and old ones having slightly different diameters. A terry cloth towel on the work bench will keep them from rolling away under the influence of that mysterious attractive force. - I used ?One-Lube? grease on the radio I worked on. This is synthetic grease available in grease-gun tubes at the auto store. (A modest investment gets you a ten-lifetime supply,) I suggest careful cleaning, and just barely enough grease in each race to hold the balls in place as you do the re-assembly. - If I remember rightly, there?s a single bearing at the end of each shaft under the ?preload? axial end play adjustment. Very careful adjustment of this part pays off to reduce backlash. - In the world of R-390?s, folks sometimes find enough tooth wear and burrs to need treatment: careful wiping of the gear face on fine crocus cloth against a very flat surface will remove the little burrs. (Follow with careful cleaning. Some R-390A?s were in use 24/7 for years, tuned frequently to find ?interesting signals?.) Note related to the URM-25D signal generator: Frequency shift when pushing and pulling the frequency set knob indicates looseness in the shaft end bearing. Careful adjustment will cure the problem. The F- model URM-25 has a different mechanism as I remember. Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 From hallicrafterssr2000 at k9axn.com Sat Feb 28 22:00:48 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Sat, 28 Feb 2015 21:00:48 -0600 Subject: [Hallicrafters] SX-100 (and other) gear train tips In-Reply-To: References: <310ABFD19ABB48CEA51EEBA986645851@LILESJLAPTOP> Message-ID: Hi Roy, Your right about those backlash springs. I?ve seen one get away pulling the chair out from under me and turning the table over. I used to stick a tough magnet in a vacuum cleaner bag and clean the whole house to catch it. My wife used to say she saw what looked like a spring two rooms away just to get me to clean the house. Using your dental floss idea --- no more house cleaning for this boy. Thanks for taking the time to pass your experiences along. Their interesting and useful and hope others will follow. There are a million unspoken ideas out there. Kindest regards Jim K9AXN -----Original Message----- From: Roy Morgan Sent: Saturday, February 28, 2015 2:03 PM To: james.liles at comcast.net Cc: hallicrafters at mailman.qth.net Subject: [Hallicrafters] SX-100 (and other) gear train tips On Feb 28, 2015, at 10:28 AM, james.liles at comcast.net wrote: > Good morning Roy, > > I am always interested in tips, tricks, and experiences with these radios. > Please share what shortcuts or make it easy information that you have with the SX-100 gear set or anything else. May save a lot of time for us. > Kindest regards Jim K9AXN Jim, Thanks for the invitation to share some tricks. My notes file had my notes and also other ideas from Greg posted some years ago, so here are his ideas also. These ideas follow from two phenomenon of radio nature: - It?s a little known principle of the physics of field theory that a magical and troublesome field of attraction exists between small parts such as anti back lash springs, shaft circle clips, and tiny setscrews and an unseen force that hides in unknown and inaccessible parts of the work room. Definite methods must be put in place to thwart the evil workings of this force. - Common telephone cable wire, usually No. 22 plastic covered, has so many uses that one effort to catalog them all ended in the well-meaning worker being sent to the loony bin. Only one use of such wire is mentioned here, partly in order to avoid any unpleasant influence on my mental health. From: WA1KBQ at aol.com Date: Sun, 23 Sep 2007 08:52:14 EDT Subject: Re: [Hallicrafters] SX-88 Gear Train Rebuild To: hallicrafters at mailman.qth.net In a message dated 9/18/2007 3:40:52 P.M. Atlantic Standard Time, roy.morgan at nist.gov writes: (not the current email address) Has anyone dis-assembled an SX-88 gear train? I have one to do and wonder what tricks there are to put the anti backlash into the split gears and keep it there during re-assembly. I have done a couple. It's the only way to clean and properly lubricate the bearings but they are a little tricky to get back together. When you have it apart be sure to look at all the bearing balls with a magnifying glass to see if any are flat spotted. The last one I did had this condition and needed them replaced. I was able to locate the correct size replacement bearing balls at McMaster Carr Industrial supply in Atlanta available in a box of 100. The main consideration for the SX-88 gear train is the reduction gears have to be timed so the end stop cams engage the followers at the precise time (position of gear train rotation). This will involve some trial and error (meaning disassembly and reassembly) as you try different gear tooth engagement positions to get them timed properly on both MT and BS. (Main tuning and Bandspread) It was easier for me to leave the springs out for this step and put them in after I had it right. Find a suitable pick to push them in place but be careful to have a means of containing them as they will quickly get away, fly across the room and ruin your day trying to find the little wayward spring again. These springs are not like any used in other common receivers so replacements would need to come from another SX-88. (Notes from K1LKY: 1)Passing a length of dental floss through the spring, encompassing one or two of the spring turns and having its other ends tied together and fastened SECURELY to some solid thing will prevent the springs from sproing-ing off to unknown places. 2) Judicious use of No. 22 telephone cable solid conductor wire on the split gears will allow you to set the gear train parts into position without any spring loading - the wire is wound around the gear from one side to the other and passes through the teeth of the gear with the spring compressed one tooth of rotation. Once the gear train is assembled, you can then cut the wire and remove it, allowing the springs to get into action. More than one (or MAYbe two) teeth of preloading will cause excessive friction and rough feel to the gear train. THOROUGH cleaning and greasing of the ball bearings and LIGHT oiling of the matching faces of the split gears and sleeve bearings will result in a system that has NO backlash and a very light touch in operation.) Also, be careful of the preload on the shaft end bearings, apply just enough to accomplish zero end play. This adjustment *may* change when the receiver heats up - it would be a fine point to check this after a thorough warm up period. When the SX-88 reduction gear train is clean and adjusted properly and sparingly lubricated in the right places there are none finer when you give that silky smooth flywheel weighted knob a spin down the band, and then tune back and forth through a steady carrier in CW mode. 73, Greg Further tips on the ball bearings and gears: - If you discover flattened, rusted, or mis-shapen balls in the mechanism, it will be worthwhile to get new replacements. Replacing all of the balls in one set is advised to avoid trouble from the new and old ones having slightly different diameters. A terry cloth towel on the work bench will keep them from rolling away under the influence of that mysterious attractive force. - I used ?One-Lube? grease on the radio I worked on. This is synthetic grease available in grease-gun tubes at the auto store. (A modest investment gets you a ten-lifetime supply,) I suggest careful cleaning, and just barely enough grease in each race to hold the balls in place as you do the re-assembly. - If I remember rightly, there?s a single bearing at the end of each shaft under the ?preload? axial end play adjustment. Very careful adjustment of this part pays off to reduce backlash. - In the world of R-390?s, folks sometimes find enough tooth wear and burrs to need treatment: careful wiping of the gear face on fine crocus cloth against a very flat surface will remove the little burrs. (Follow with careful cleaning. Some R-390A?s were in use 24/7 for years, tuned frequently to find ?interesting signals?.) Note related to the URM-25D signal generator: Frequency shift when pushing and pulling the frequency set knob indicates looseness in the shaft end bearing. Careful adjustment will cure the problem. The F- model URM-25 has a different mechanism as I remember. Roy Roy Morgan RoyMorgan at alum.mit.edu K1LKY Since 1958 ______________________________________________________________ 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

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