From paul at paulbaldock.com Sun Oct 1 12:26:40 2017 From: paul at paulbaldock.com (Paul Baldock) Date: Sun, 01 Oct 2017 09:26:40 -0700 Subject: [AMRadio] AM/SSB Classic Exchange Today In-Reply-To: <000001d33a0d$4b8660c0$e2932240$@netcom.com> References: <000001d33a0d$4b8660c0$e2932240$@netcom.com> Message-ID: <59d11741.8b93620a.829da.43b1@mx.google.com> I don't hear any activity in the AM/SSB Classic Exchange today? Does anybody? - Paul From ranchorobbo at gmail.com Mon Oct 2 08:33:10 2017 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Mon, 2 Oct 2017 07:33:10 -0500 Subject: [AMRadio] Revisit In-Reply-To: References: <000e01d339ae$cae64e20$60b2ea60$@charter.net> Message-ID: The original sham was the work of one or more hams with influence who had an agenda to get rid of AM because it did not fit their personal ham radio world-view. Rob K5UJ On Sat, Sep 30, 2017 at 7:30 AM, Douglas Burlew wrote: > After re-reading the FCC?s rationale for the change in power measurement for the Amateur Radio Service (graciously > provided by K4KYV) the conclusion is they made a weak argument that has not aged well. So, there may be a glimmer > of hope. From mjcal77 at yahoo.com Thu Oct 5 15:04:06 2017 From: mjcal77 at yahoo.com (CL in NC) Date: Thu, 5 Oct 2017 19:04:06 +0000 (UTC) Subject: [AMRadio] Tube question References: <1872576623.2117102.1507230246151.ref@mail.yahoo.com> Message-ID: <1872576623.2117102.1507230246151@mail.yahoo.com> OK, one of my TX's is a BC375 that uses four VT4C triodes. Thankfully, they are all good, and I have a couple spares. Today, American made NOS run in the hundreds of bucks each, but a place down in FLA is selling them new manufactured, from China I'm guessing , for $125 a pair, not too bad comparatively. Here is my question. I understand that these are highly sought after by audiophiles, but I have not found any HI-FI or stereo amp that uses them. Anybody have a link to where the apparent god of stereo is selling these amps that jack the price for some more noteworthy use, like in my TX? Charlie, W4MEC in NC From ka1kaq at gmail.com Thu Oct 5 17:31:50 2017 From: ka1kaq at gmail.com (Todd, KA1KAQ) Date: Thu, 5 Oct 2017 17:31:50 -0400 Subject: [AMRadio] Tube question In-Reply-To: <1872576623.2117102.1507230246151@mail.yahoo.com> References: <1872576623.2117102.1507230246151.ref@mail.yahoo.com> <1872576623.2117102.1507230246151@mail.yahoo.com> Message-ID: Charlie, there's a bunch of stuff on the internet for VT4C amps. No idea who, if anyone manufactures them but it's a favorite tube for the DIY crowd. Lower powered cousin to the 845, more or less. Here's a youtube video of one such amp using a very early brass based/tipped top version: https://www.youtube.com/watch?v=WeE9xXGrDzU The Asians, Russians, and Chinese really go after the original tubes. If you think 211s are pricey, check 845s sometime. I liquidated my stock of 845s and many GL-211s years back to free up some cash for other projects. Prices were high then (845s were averaging a kilobuck, less if used, 211s $200-$500) which no doubt helped drive the China connection. Never used them but I can tell you that the envelope size is noticeably smaller. Not a lot, but it is noticeable - if that matters. I'd say check around some of the audio sites online and see what folks have to say. From an RF-perspective as well as over-air, make/shape/size shouldn't matter. ~ Todd, KA1KAQ/4 On Thu, Oct 5, 2017 at 3:04 PM, CL in NC via AMRadio < amradio at mailman.qth.net> wrote: > OK, one of my TX's is a BC375 that uses four VT4C triodes. Thankfully, > they are all good, and I have a couple spares. Today, American made NOS > run in the hundreds of bucks each, but a place down in FLA is selling them > new manufactured, from China I'm guessing , for $125 a pair, not too bad > comparatively. Here is my question. I understand that these are highly > sought after by audiophiles, but I have not found any HI-FI or stereo amp > that uses them. Anybody have a link to where the apparent god of stereo is > selling these amps that jack the price for some more noteworthy use, like > in my TX? > > Charlie, W4MEC in NC > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ka1kaq at gmail.com > From k4kyv at charter.net Fri Oct 6 19:10:26 2017 From: k4kyv at charter.net (Donald Chester) Date: Fri, 6 Oct 2017 18:10:26 -0500 Subject: [AMRadio] Tube question In-Reply-To: <1872576623.2117102.1507230246151@mail.yahoo.com> References: <1872576623.2117102.1507230246151.ref@mail.yahoo.com> <1872576623.2117102.1507230246151@mail.yahoo.com> Message-ID: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> > OK, one of my TX's is a BC375 that uses four VT4C triodes. > Thankfully, they are all good, and I have a couple spares. Today, > American made NOS run in the hundreds of bucks each, but a place down > in FLA is selling them new manufactured, from China I'm guessing , for > $125 a pair, not too bad comparatively. Here is my question. I > understand that these are highly sought after by audiophiles, but I > have not found any HI-FI or stereo amp that uses them. Anybody have > a link to where the apparent god of stereo is selling these amps that > jack the price for some more noteworthy use, like in my TX? > > Charlie, W4MEC in NC I use both 845s and 211s in my station, the 845s as audio drivers in two of my transmitters, and the 211 as rf driver in another. Good spares of each on hand, NOT for sale. Eat your hearts out, audiophools. Don k4kyv --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus From commtekman at aol.com Fri Oct 6 19:29:52 2017 From: commtekman at aol.com (commtekman at aol.com) Date: Fri, 6 Oct 2017 19:29:52 -0400 Subject: [AMRadio] Tube question In-Reply-To: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> Message-ID: <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> I am a silent observer of this forum and am surprised that these large triodes have application in the audio field. I did a fast search in my comm shop and didn't find any 845 but do have a number of the 211 type. I thought I had some that were in military type boxes that were marked V4C but I found them yet. I always enjoy your comments on this forum. Bob K6OSM since 1958 ? ? In a message dated 10/6/2017 4:12:51 PM Pacific Standard Time, k4kyv at charter.net writes: ? > OK, one of my TX's is a BC375 that uses four VT4C triodes. > Thankfully, they are all good, and I have a couple spares. Today, > American made NOS run in the hundreds of bucks each, but a place down > in FLA is selling them new manufactured, from China I'm guessing , for > $125 a pair, not too bad comparatively. Here is my question. I > understand that these are highly sought after by audiophiles, but I > have not found any HI-FI or stereo amp that uses them. Anybody have > a link to where the apparent god of stereo is selling these amps that > jack the price for some more noteworthy use, like in my TX? > > Charlie, W4MEC in NC I use both 845s and 211s in my station, the 845s as audio drivers in two of my transmitters, and the 211 as rf driver in another. Good spares of each on hand, NOT for sale. Eat your hearts out, audiophools. Don k4kyv --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to commtekman at aol.com From k9cox at charter.net Sat Oct 7 02:55:22 2017 From: k9cox at charter.net (Ross Stenberg) Date: Sat, 7 Oct 2017 01:55:22 -0500 Subject: [AMRadio] Tube question In-Reply-To: <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> References: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> Message-ID: On the high end they really like 833 amps. 73 Ross K9COX Sent from Mail for Windows 10 From: K6OSM via AMRadio Sent: Friday, October 6, 2017 6:32 PM To: k4kyv at charter.net; amradio at mailman.qth.net Subject: Re: [AMRadio] Tube question I am a silent observer of this forum and am surprised that these large triodes have application in the audio field. I did a fast search in my comm shop and didn't find any 845 but do have a number of the 211 type. I thought I had some that were in military type boxes that were marked V4C but I found them yet. I always enjoy your comments on this forum. Bob K6OSM since 1958 ? From mjcal77 at yahoo.com Sat Oct 7 09:29:31 2017 From: mjcal77 at yahoo.com (CL in NC) Date: Sat, 7 Oct 2017 13:29:31 +0000 (UTC) Subject: [AMRadio] Old Time Bookstore References: <1106425403.3116622.1507382971377.ref@mail.yahoo.com> Message-ID: <1106425403.3116622.1507382971377@mail.yahoo.com> I know a couple folks have interest in actual hard copies of stuff, and YOTB is now up to 75% off everything. Lots of old reprint stuff, including ham and radio in general. If you were ever intrigued by the 'Impoverished Radio Experimenter' series, now's your chance. Yes, a lot of this is probably on the internet for free, but save your printer ink. www.youroldtimebookstore.com Think gas is bad? If your ink cartridge holds 1 oz and costs you $20, that's like $2500 bucks a gallon. Charlie in NC From k4kyv at charter.net Sat Oct 7 16:15:56 2017 From: k4kyv at charter.net (Donald Chester) Date: Sat, 7 Oct 2017 15:15:56 -0500 Subject: [AMRadio] Tube question In-Reply-To: <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> References: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> Message-ID: <001c01d33fa9$15b62d80$41228880$@charter.net> The 845 has always been primarily an audio tube. The RCA manual even says they are not recommended for RF use. One of the earlier uses dating back to the 1920s was as class-A single ended modulators using the Heising ?constant-current? configuration. When Loy Barton came up with the Class-B modulator idea circa 1930, 845s were found to make excellent audio drivers because their relatively low internal plate resistance worked well with the widely varying grid impedance of the modulator tubes over the audio cycle. Class A 845s also make good amplifiers to drive hi-fi loudspeakers, since speaker impedance also varies widely, with frequency. Whether as class-B drivers or speaker amplifiers, the 845 provides a well-regulated source of audio driver voltage, minimising distortion as the load varies over the audio cycle. The 211 also works for this purpose, but not as well as the 845. I am a silent observer of this forum and am surprised that these large triodes have application in the audio field. I did a fast search in my comm shop and didn't find any 845 but do have a number of the 211 type. I thought I had some that were in military type boxes that were marked V4C but I found them yet. I always enjoy your comments on this forum. Bob K6OSM since 1958 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus From commtekman at aol.com Sun Oct 8 15:36:01 2017 From: commtekman at aol.com (commtekman at aol.com) Date: Sun, 8 Oct 2017 15:36:01 -0400 Subject: [AMRadio] Tube question In-Reply-To: Message-ID: <15efd7cb192-c0a-186f6@webjas-vaa126.srv.aolmail.net> I have a couple of UV204-A tubes, I bet they would be just wonderful for that big sound system-sealed Bob K6OSM ? ? ? In a message dated 10/6/2017 11:56:11 PM Pacific Standard Time, k9cox at charter.net writes: ? On the high end they really like 833 amps. 73 Ross K9COX Sent from Mail for Windows 10 From: K6OSM via AMRadio Sent: Friday, October 6, 2017 6:32 PM To: k4kyv at charter.net; amradio at mailman.qth.net Subject: Re: [AMRadio] Tube question I am a silent observer of this forum and am surprised that these large triodes have application in the audio field. I did a fast search in my comm shop and didn't find any 845 but do have a number of the 211 type. I thought I had some that were in military type boxes that were marked V4C but I found them yet. I always enjoy your comments on this forum. Bob K6OSM since 1958 ? ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to commtekman at aol.com From w5jo at brightok.net Sun Oct 8 18:56:37 2017 From: w5jo at brightok.net (w5jo at brightok.net) Date: Sun, 8 Oct 2017 17:56:37 -0500 Subject: [AMRadio] To those who can attend Message-ID: <800450246CF14863A97D1D9BCF1A3C11@JimPC> Texoma Hamarama - 70th Anniversary ! www.texomahamarama.org Ardmore, Oklahoma Convention Center October 27 - 28. 2017 Mail in Pre-Registration closes October 20th, 2017 Online Pre-Registration closes October 25, 2017 Onsite registration throughout event Very nice Facility, Wide aisles Lots of Parking, Near Lake Murray and Turner Falls Overnight Accommodations onsite and close by venue Scholarship applications should be postmarked by October 20, 2017 Vendors, Flea-market, Forums, Food Trucks, Bingo, Kids Room Ham Radio Prizes, Ladies? Prizes, Children?s Prizes, Bingo Prizes Scholarship Award From jayw5jay at gmail.com Mon Oct 9 03:23:19 2017 From: jayw5jay at gmail.com (Jay Bromley) Date: Mon, 9 Oct 2017 02:23:19 -0500 Subject: [AMRadio] Wanted Heathkit DX-60 manual Message-ID: Hi Guys, I am wondering if anyone has an original DX-60 manual they might consider getting rid of? I know they are some on line, but the text and schematics are hard to read at times. I am not sure of the differences in the DX-60 and the DX-60B, but my DX-60 has the green meter bezel. With some of these rigs being parted out I am hoping that someone may have an extra manual they no longer need? Thank you 73 de w5jay/jay.. w5jay at arrl.net From w5jo at brightok.net Mon Oct 9 17:03:56 2017 From: w5jo at brightok.net (w5jo at brightok.net) Date: Mon, 9 Oct 2017 16:03:56 -0500 Subject: [AMRadio] Gov. Publishing service Message-ID: Some of you guys like to read the rules and regulations. Here is a site that will allow you to peruse Title 47 which contains Telecommunications and other services. https://www.gpo.gov/fdsys/pkg/CFR-2001-title42-vol1/content-detail.html Have fun reading. Jim W5JO From ka1kaq at gmail.com Sat Oct 21 16:04:01 2017 From: ka1kaq at gmail.com (Todd, KA1KAQ) Date: Sat, 21 Oct 2017 16:04:01 -0400 Subject: [AMRadio] NEAR-Fest XXII Photos Message-ID: I've posted a few photos over on AMfone.net of the big New England Amateur Radio Festival hamfest held last weekend in NH. There are also a few posted in the QSO forum: http://amfone.net/Amforum/index.php?action=gallery;cat=21 The event was very well attended, WX was excellent both days, and there was a LOT of good stuff, commercial/civilian as well as military. I attended with my good friend John/W3JN from MD, we both sold as well. I sold everything except my RAK-8 & power supply. Managed to haul home a shock mount for my T-368 for which I've been searching a looong time. It was a gift from Ross/W1EKG who recently became a T-368 owner. My one purchase was a Meissner 150-B Signal Corps transmitter complete with exciter & coils, plus tank coils & coil box. The RF section has been pretty badly mauled but I think it's salvageable. Especially if I can locate a replacement RF unit. Will be posting more on that subject soon. Had a great time despite the long drive north, really enjoyed the Friday night AM Dinner as well. ~ Todd, KA1KAQ/4 From ranchorobbo at gmail.com Sat Oct 21 17:17:42 2017 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Sat, 21 Oct 2017 16:17:42 -0500 Subject: [AMRadio] NEAR-Fest XXII Photos In-Reply-To: References: Message-ID: You dog, getting that 150-B! I've looked for one for years and finally gave up. Congratulations!. I have the exciter unit, very nicely built and I think I put the 150-B manual up on the internet as pdf file. Thanks for posting the photos. Last time I saw a 150-B was on eBay a few years ago. I sort of lost interest due to the 300 lb weight. Who got the HT-20, KM1H? He's been looking for one for years. 73 Rob K5UJ On Sat, Oct 21, 2017 at 3:04 PM, Todd, KA1KAQ wrote: > I've posted a few photos over on AMfone.net of the big New England Amateur > Radio Festival hamfest held last weekend in NH. There are also a few posted > in the QSO forum: > > http://amfone.net/Amforum/index.php?action=gallery;cat=21 > > The event was very well attended, WX was excellent both days, and there was > a LOT of good stuff, commercial/civilian as well as military. I attended > with my good friend John/W3JN from MD, we both sold as well. I sold > everything except my RAK-8 & power supply. > > Managed to haul home a shock mount for my T-368 for which I've been > searching a looong time. It was a gift from Ross/W1EKG who recently became > a T-368 owner. > > My one purchase was a Meissner 150-B Signal Corps transmitter complete with > exciter & coils, plus tank coils & coil box. The RF section has been pretty > badly mauled but I think it's salvageable. Especially if I can locate a > replacement RF unit. Will be posting more on that subject soon. > > Had a great time despite the long drive north, really enjoyed the Friday > night AM Dinner as well. > > ~ Todd, KA1KAQ/4 From ranickel at comcast.net Sun Oct 22 11:32:01 2017 From: ranickel at comcast.net (Robert Nickels) Date: Sun, 22 Oct 2017 10:32:01 -0500 Subject: [AMRadio] Unusual transformer Message-ID: I'm puzzling over a transformer I found in my junk, which is clearly identified as a Thoardson T-21M66, but even after finding it listed in the 1947 catalog online, I'm still not sure how it was used. ??? It is described as a "Matching Line to RF Load Modulation (M) Transformer" and has a single 500 ohm primary (that would be the "line" part), and five secondary taps that are only described as "5M-6M-7M-8M-9M-10M" which must be the "RF Matching" part, but darned if I know what these values are or how the transformer would be used.?? The audio power rating is 50 watts and the secondary is good for 200MA.??? A scan of the actual catalog section can be seen here: https://i.imgur.com/2eyXns2.png I've included the multi-match modulation transformer section above so you can see what the column headings refer to.?? Can anyone shed light on what this transformer was used for and what the secondary values mean? Thanks and 73, Bob W9RAN From k4kyv at charter.net Sun Oct 22 11:52:03 2017 From: k4kyv at charter.net (Donald Chester) Date: Sun, 22 Oct 2017 10:52:03 -0500 Subject: [AMRadio] Unusual transformer In-Reply-To: References: Message-ID: <000901d34b4d$b49e8910$1ddb9b30$@charter.net> > I'm puzzling over a transformer I found in my junk, which is clearly identified > as a Thoardson T-21M66, but even after finding it listed in the 1947 catalog > online, I'm still not sure how it was used. It is described as a "Matching Line > to RF Load Modulation (M) Transformer" and has a single 500 ohm primary > (that would be the "line" part), and five secondary taps that are only > described as "5M-6M-7M-8M-9M-10M" which must be the "RF Matching" > part, but darned if I know what these values are or how the transformer > would be used. The audio power rating is 50 watts and the secondary is > good for 200MA. A scan of the actual catalog section can be seen here: > > https://i.imgur.com/2eyXns2.png > > I've included the multi-match modulation transformer section above so you > can see what the column headings refer to. Can anyone shed light on what > this transformer was used for and what the secondary values mean? > > Bob W9RAN Looks like it's a modulation transformer designed to be fed with a 500-ohm line, instead of directly by the plates of the modulator tubes. The modulator tubes need a plate(s) to 500-ohm output transformer to feed the line. Could be useful when the modulator is in a separate rack some distance from the RF section, and one would prefer to feed the audio throug a 500-ohm line instead of running the high voltage from the modulator or the final through long leads running between the racks. 5M-6M-7M-8M-9M-10M means the same thing as 5K-6K-7K..., i.e. 5000, 6000, 7000 etc. "M" is sometimes used as an abbreviation for "mill" = thousand. https://www.merriam-webster.com/dictionary/per%20mill Don k4kyv --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus From wf2u at ws19ops.com Sun Oct 22 11:54:17 2017 From: wf2u at ws19ops.com (WF2U) Date: Sun, 22 Oct 2017 11:54:17 -0400 Subject: [AMRadio] Unusual transformer In-Reply-To: References: Message-ID: <3541c223-b2c3-470b-a2c3-f31932e09bb6@ws19ops.com> Maybe the M refers to the primary impedance, so the secondary would be 5M = 2,500 ohm, to 10M = 5,000 ohm? Just a thought... Meir WF2U Landrum, SC ?Sent from BlueMail ? On Oct 22, 2017, 11:32 AM, at 11:32 AM, Robert Nickels wrote: >I'm puzzling over a transformer I found in my junk, which is clearly >identified as a Thoardson T-21M66, but even after finding it listed in >the 1947 catalog online, I'm still not sure how it was used. ??? It is >described as a "Matching Line to RF Load Modulation (M) Transformer" >and >has a single 500 ohm primary (that would be the "line" part), and five >secondary taps that are only described as "5M-6M-7M-8M-9M-10M" which >must be the "RF Matching" part, but darned if I know what these values >are or how the transformer would be used.?? The audio power rating is >50 >watts and the secondary is good for 200MA.??? A scan of the actual >catalog section can be seen here: > >https://i.imgur.com/2eyXns2.png > >I've included the multi-match modulation transformer section above so >you can see what the column headings refer to.?? Can anyone shed light >on what this transformer was used for and what the secondary values >mean? > >Thanks and 73, > >Bob W9RAN > >______________________________________________________________ >Our Main Website: http://www.amfone.net >AMRadio mailing list >Archives: http://mailman.qth.net/pipermail/amradio/ >List Rules (must read!): http://w5ami.net/amradiofaq.html >List Home: http://mailman.qth.net/mailman/listinfo/amradio >Post: AMRadio at mailman.qth.net >To unsubscribe, send an email to amradio-request at mailman.qth.net with >the word unsubscribe in the message body. > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html >Message delivered to wf2u at ws19ops.com From ranickel at comcast.net Sun Oct 22 12:26:53 2017 From: ranickel at comcast.net (Robert Nickels) Date: Sun, 22 Oct 2017 11:26:53 -0500 Subject: [AMRadio] Unusual transformer In-Reply-To: <000901d34b4d$b49e8910$1ddb9b30$@charter.net> References: <000901d34b4d$b49e8910$1ddb9b30$@charter.net> Message-ID: On 10/22/2017 10:52 AM, Donald Chester wrote: > Looks like it's a modulation transformer designed to be fed with a 500-ohm line, instead of directly by the plates of the modulator tubes. Ah!? I think you're right, Don - especially makes sense because it was part of a bunch of iron that came from a guy who built broadcast transmitters back in the 30s when it was legal to do that, as well as ham transmitters. > 5M-6M-7M-8M-9M-10M means the same thing as 5K-6K-7K..., i.e. 5000, 6000, 7000 etc. "M" is sometimes used as an abbreviation for "mill" = thousand. That abbreviation skipped right over me, but yes, "mill" was used before the now-ubiquitous "K". So, a useful transformer, especially if an old PA amp or such was rigged to provide the 500 ohm drive. Mystery solved, thanks! 73, Bob W9RAN From macklinbob at gmail.com Sun Oct 22 12:56:04 2017 From: macklinbob at gmail.com (K5MYJ) Date: Sun, 22 Oct 2017 09:56:04 -0700 Subject: [AMRadio] Unusual transformer References: Message-ID: <6079A7E76E98409489BF0FF78A4A5831@IVORYTOWER> The "5M-6M-7M-8M-9M-10M" is actually "5K-6K-7K-8K-9K-10K". Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message ----- From: "Robert Nickels" To: "Discussion of AM Radio" Sent: Sunday, October 22, 2017 8:32 AM Subject: [AMRadio] Unusual transformer > I'm puzzling over a transformer I found in my junk, which is clearly > identified as a Thoardson T-21M66, but even after finding it listed in > the 1947 catalog online, I'm still not sure how it was used. It is > described as a "Matching Line to RF Load Modulation (M) Transformer" and > has a single 500 ohm primary (that would be the "line" part), and five > secondary taps that are only described as "5M-6M-7M-8M-9M-10M" which > must be the "RF Matching" part, but darned if I know what these values > are or how the transformer would be used. The audio power rating is 50 > watts and the secondary is good for 200MA. A scan of the actual > catalog section can be seen here: > > https://i.imgur.com/2eyXns2.png > > I've included the multi-match modulation transformer section above so > you can see what the column headings refer to. Can anyone shed light > on what this transformer was used for and what the secondary values mean? > > Thanks and 73, > > Bob W9RAN > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to macklinbob at gmail.com From ka1kaq at gmail.com Sun Oct 22 18:03:28 2017 From: ka1kaq at gmail.com (Todd, KA1KAQ) Date: Sun, 22 Oct 2017 18:03:28 -0400 Subject: [AMRadio] NEAR-Fest XXII Photos In-Reply-To: References: Message-ID: Hey Rob - Well buddy, I was thinking of you on a couple levels: first, I also have the exciter and finally found a manual last spring (used your online version numerous times) so we travel a similar road there. Actually had an exciter for years but sold it in 2008 to KA1SHU in Maine who had the 150-B to go with it. Came across the other a year ago at NEAR-Fest, and the transmitter came with one last week. Originally, I was following up on another 150-B I had heard about last year possibly coming up for sale then rumors of another. I remembered you were interested so was ready to email you if they both showed up. Neither did. The one I got only surfaced a month or so back and ended up being a buddy in VT from the AM crew. Never knew he had one. He's had it for 25 years and never knew I was looking for one. And we're 'communicators'...! Posted a few more photos on 'fone: http://amfone.net/Amforum/index.php?topic=43283.0 The old girl has more than a few issues, the worst being hacks done to the RF section. Started ripping those out last night. Someone made it into a mono band rig. Hoping to find a replacement RF unit but planning (expecting) to hunt down the pieces needed to repair this one. Did some hammer work on the cabinet this afternoon which was wracked and bent a bit. Much better now. If you're still interested, there's a good chance one is coming up in the next year. Best way to handle shipping if you're not in a rush is to use the AM Pony Express - find someone heading your way, have it hauled to Dayton, pay for gas, etc. Have moved a number of big pieces up and down the eastern seaboard for folks in recent years free of charge. Happy to help you out on this end any way I can. The HT-20 went home with WA2PJP(in the photo) for $200. Very nice shape but Joe, being a perfectionist, is going to do it over completely. He also found a SX-88 in NJ a while back for $350 IIRC, which has been stripped down completely and is being rebuilt/repainted. W0YVA screens the front panels for both. The Meissner is my last transmitter acquisition. Won't rule out some neat pre-war/early piece but no more heavyweights. ~ Todd/KAQ On Sat, Oct 21, 2017 at 5:17 PM, Rob Atkinson wrote: > You dog, getting that 150-B! I've looked for one for years and > finally gave up. Congratulations!. I have the exciter unit, very > nicely built and I think I put the 150-B manual up on the internet as > pdf file. Thanks for posting the photos. Last time I saw a 150-B > was on eBay a few years ago. I sort of lost interest due to the 300 > lb weight. Who got the HT-20, KM1H? He's been looking for one for > years. > > 73 > > Rob > K5UJ > > On Sat, Oct 21, 2017 at 3:04 PM, Todd, KA1KAQ wrote: > > I've posted a few photos over on AMfone.net of the big New England > Amateur > > Radio Festival hamfest held last weekend in NH. There are also a few > posted > > in the QSO forum: > > > > http://amfone.net/Amforum/index.php?action=gallery;cat=21 > > > > The event was very well attended, WX was excellent both days, and there > was > > a LOT of good stuff, commercial/civilian as well as military. I attended > > with my good friend John/W3JN from MD, we both sold as well. I sold > > everything except my RAK-8 & power supply. > > > > Managed to haul home a shock mount for my T-368 for which I've been > > searching a looong time. It was a gift from Ross/W1EKG who recently > became > > a T-368 owner. > > > > My one purchase was a Meissner 150-B Signal Corps transmitter complete > with > > exciter & coils, plus tank coils & coil box. The RF section has been > pretty > > badly mauled but I think it's salvageable. Especially if I can locate a > > replacement RF unit. Will be posting more on that subject soon. > > > > Had a great time despite the long drive north, really enjoyed the Friday > > night AM Dinner as well. > > > > ~ Todd, KA1KAQ/4 > From ranchorobbo at gmail.com Mon Oct 23 06:00:27 2017 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Mon, 23 Oct 2017 05:00:27 -0500 Subject: [AMRadio] NEAR-Fest XXII Photos In-Reply-To: References: Message-ID: Thanks, but I have an 813 x 811A rig, an Eldico TR-1 and I'm putting it into a short 3 foot tall rack. It doesn't have the 20 or so Stancor transformers and chokes but it's also a lot lighter and easier to move, hi. I've worked KA1SHU but never knew he had a 150-B. So Joe has a HT-20. I'll enjoy talking to him about it. Yes, when Joe is done it will look brand new. Rob K5UJ On Sun, Oct 22, 2017 at 5:03 PM, Todd, KA1KAQ wrote: > Hey Rob - > > Well buddy, I was thinking of you on a couple levels: first, I also have the > exciter and finally found a manual last spring (used your online version > numerous times) so we travel a similar road there. Actually had an exciter > for years but sold it in 2008 to KA1SHU in Maine who had the 150-B to go > with it. Came across the other a year ago at NEAR-Fest, and the transmitter > came with one last week. > > Originally, I was following up on another 150-B I had heard about last year > possibly coming up for sale then rumors of another. I remembered you were > interested so was ready to email you if they both showed up. Neither did. > The one I got only surfaced a month or so back and ended up being a buddy in > VT from the AM crew. Never knew he had one. He's had it for 25 years and > never knew I was looking for one. And we're 'communicators'...! Posted a few > more photos on 'fone: http://amfone.net/Amforum/index.php?topic=43283.0 > > The old girl has more than a few issues, the worst being hacks done to the > RF section. Started ripping those out last night. Someone made it into a > mono band rig. Hoping to find a replacement RF unit but planning (expecting) > to hunt down the pieces needed to repair this one. Did some hammer work on > the cabinet this afternoon which was wracked and bent a bit. Much better > now. > > If you're still interested, there's a good chance one is coming up in the > next year. Best way to handle shipping if you're not in a rush is to use the > AM Pony Express - find someone heading your way, have it hauled to Dayton, > pay for gas, etc. Have moved a number of big pieces up and down the eastern > seaboard for folks in recent years free of charge. Happy to help you out on > this end any way I can. > > The HT-20 went home with WA2PJP(in the photo) for $200. Very nice shape but > Joe, being a perfectionist, is going to do it over completely. He also found > a SX-88 in NJ a while back for $350 IIRC, which has been stripped down > completely and is being rebuilt/repainted. W0YVA screens the front panels > for both. > > The Meissner is my last transmitter acquisition. Won't rule out some neat > pre-war/early piece but no more heavyweights. > From paul at paulbaldock.com Tue Oct 24 14:59:12 2017 From: paul at paulbaldock.com (Paul Baldock) Date: Tue, 24 Oct 2017 11:59:12 -0700 Subject: [AMRadio] CQ 29.0MHz In-Reply-To: <001c01d33fa9$15b62d80$41228880$@charter.net> References: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> <001c01d33fa9$15b62d80$41228880$@charter.net> Message-ID: <59ef8db4.46b5630a.803a8.3462@mx.google.com> Band is open KW7Y From paul at paulbaldock.com Thu Oct 26 19:11:09 2017 From: paul at paulbaldock.com (Paul Baldock) Date: Thu, 26 Oct 2017 16:11:09 -0700 Subject: [AMRadio] CQ 29.0MHz Message-ID: <59f26b8e.4871620a.a6123.c76e@mx.google.com> Band is open 2310Z WA to CA KW7Y From ne1s at securespeed.us Sat Oct 28 09:41:24 2017 From: ne1s at securespeed.us (Larry Szendrei) Date: Sat, 28 Oct 2017 09:41:24 -0400 Subject: [AMRadio] Tek 535/545 vertical amp calibration question Message-ID: <6297b473-5152-61b0-95da-1e1b1500e953@securespeed.us> Hi, Apologies for the slightly off-topic post. I wonder if anyone has any tips for how to calibrate the vertical amplifier on a Tektronics 535 and/or 545 oscilloscope without the EP53A Gain Set Adaptor called for in the manuals' procedure? Thanks, -Larry/NE1S From mjcal77 at yahoo.com Sat Oct 28 10:43:57 2017 From: mjcal77 at yahoo.com (CL in NC) Date: Sat, 28 Oct 2017 14:43:57 +0000 (UTC) Subject: [AMRadio] Passing along info References: <88377116.5073594.1509201837448.ref@mail.yahoo.com> Message-ID: <88377116.5073594.1509201837448@mail.yahoo.com> A fellow in the CCA has done some crystal research and found these 4 willing to do biz in the US. The English one he said is the preferred company, and they have been very busy with US orders since our choices here are almost zero. There websites: http://www.quartslab.com/ http://www.hminternational.be/ http://www.krystaly.cz/en/ http://bomarcrystal.com/ There was a fourth in Italy, but he said they did not answer his emails. My contact with Bomar via email got a response from somebody that had no idea what I was talking about, did not know International Crystals shut down, and apparently has never heard of Amateur Radio. Charlie, W4MEC in NC From jcandela at prodigy.net Sun Oct 29 12:51:40 2017 From: jcandela at prodigy.net (Jim Candela) Date: Sun, 29 Oct 2017 16:51:40 +0000 (UTC) Subject: [AMRadio] Tek 535/545 vertical amp calibration question In-Reply-To: <6297b473-5152-61b0-95da-1e1b1500e953@securespeed.us> References: <6297b473-5152-61b0-95da-1e1b1500e953@securespeed.us> Message-ID: <1207738731.7059282.1509295900953@mail.yahoo.com> Larry, ?? Those scopes are great shack heaters in the winter! Running yours might save some coal. I once had a 547 with 1A4 plug in. That was one of the best scopes I've ever owned. That series has a weakness though with the HV CRT flyback circuit. The potted ferrite transformer gets lossy as the potting (epoxy?) ages. As time goes by the closed loop regulator driving the 6AU5 (?) goes open loop, and from there the CRT begins to dim quickly. There was a retired Textronix guy named Dean (?) back 30 years ago selling new transformers. ?? As to your question, best I have heard, just leave those adjustments alone if you don't have an EP53A. If you proceed, you might make things worse then they already might be. Still, with enough time, some level of experimentation might produce the results your looking for. Good Luck,JimWd5JKO From: Larry Szendrei To: Glowbugs ; AWAGroup ; AWA Reflector ; Discussion of AM Radio Sent: Saturday, October 28, 2017 8:42 AM Subject: [AMRadio] Tek 535/545 vertical amp calibration question Hi, Apologies for the slightly off-topic post. I wonder if anyone has any tips for how to calibrate the vertical amplifier on a Tektronics 535 and/or 545 oscilloscope without the EP53A Gain Set Adaptor called for in the manuals' procedure? Thanks, -Larry/NE1S ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jcandela at prodigy.net From ne1s at securespeed.us Sun Oct 29 13:19:01 2017 From: ne1s at securespeed.us (Larry Szendrei) Date: Sun, 29 Oct 2017 13:19:01 -0400 Subject: [AMRadio] Tek 535/545 vertical amp calibration question In-Reply-To: <1207738731.7059282.1509295900953@mail.yahoo.com> References: <6297b473-5152-61b0-95da-1e1b1500e953@securespeed.us> <1207738731.7059282.1509295900953@mail.yahoo.com> Message-ID: Thanks for the comments, Jim, and good to hear from you. Yeah, I've got a 535A and an RM45 (rack-mount version of the 545). Unfortunately, they've both had repairs which preclude "just leaving the adjustments alone." I received some very helpful feedback from another reflector which sent me to this link: https://groups.io/g/TekScopes/topic/951626?p=,,,20,0,0,0::,,,0,0,0,951626 I've got an extra plug-in I can modify to serve the purpose of the missing adaptor. It's an extremely simple procedure to do so. I've never had the HV problem you described in either scope, or with my Tek 575 curve tracer. The HV transformer is an open-frame (not the potted type) in each; maybe that's why. 73, -Larry/NE1S On 10/29/17 12:51 PM, Jim Candela wrote: > Larry, > > Those scopes are great shack heaters in the winter! Running yours > might save some coal. I once had a 547 with 1A4 plug in. That was one > of the best scopes I've ever owned. That series has a weakness though > with the HV CRT flyback circuit. The potted ferrite transformer gets > lossy as the potting (epoxy?) ages. As time goes by the closed loop > regulator driving the 6AU5 (?) goes open loop, and from there the CRT > begins to dim quickly. There was a retired Textronix guy named Dean > (?) back 30 years ago selling new transformers. > > As to your question, best I have heard, just leave those adjustments > alone if you don't have an EP53A. If you proceed, you might make > things worse then they already might be. Still, with enough time, some > level of experimentation might produce the results your looking for. > > Good Luck, > Jim > Wd5JKO > > ------------------------------------------------------------------------ > *From:* Larry Szendrei > *To:* Glowbugs ; AWAGroup > ; AWA Reflector > ; Discussion of AM Radio > > *Sent:* Saturday, October 28, 2017 8:42 AM > *Subject:* [AMRadio] Tek 535/545 vertical amp calibration question > > Hi, > > Apologies for the slightly off-topic post. > > I wonder if anyone has any tips for how to calibrate the vertical > amplifier on a Tektronics 535 and/or 545 oscilloscope without the EP53A > Gain Set Adaptor called for in the manuals' procedure? > > Thanks, > -Larry/NE1S > > > From amvictor at ncsu.edu Sun Oct 29 16:24:07 2017 From: amvictor at ncsu.edu (Alan Victor) Date: Sun, 29 Oct 2017 13:24:07 -0700 Subject: [AMRadio] Tek 535/545 vertical amp calibration question In-Reply-To: <1207738731.7059282.1509295900953@mail.yahoo.com> References: <6297b473-5152-61b0-95da-1e1b1500e953@securespeed.us> <1207738731.7059282.1509295900953@mail.yahoo.com> Message-ID: You might want to take a look at the procedure in the 454 manual using the internal 1 kHz source. Balancing the vertical amplifier gain and offset as you switch ranges DOES require a procedure and that might get you there. If it is really messed up, I know it can drive you nuts. Following the 454 procedure, all zeros in properly in about 10 minutes or less!. 73' Alan On Sun, Oct 29, 2017 at 9:51 AM, Jim Candela wrote: > Larry, > Those scopes are great shack heaters in the winter! Running yours might > save some coal. I once had a 547 with 1A4 plug in. That was one of the best > scopes I've ever owned. That series has a weakness though with the HV CRT > flyback circuit. The potted ferrite transformer gets lossy as the potting > (epoxy?) ages. As time goes by the closed loop regulator driving the 6AU5 > (?) goes open loop, and from there the CRT begins to dim quickly. There was > a retired Textronix guy named Dean (?) back 30 years ago selling new > transformers. > As to your question, best I have heard, just leave those adjustments > alone if you don't have an EP53A. If you proceed, you might make things > worse then they already might be. Still, with enough time, some level of > experimentation might produce the results your looking for. > Good Luck,JimWd5JKO > > From: Larry Szendrei > To: Glowbugs ; AWAGroup < > AWAGroup at yahoogroups.com>; AWA Reflector yahoogroups.com>; Discussion of AM Radio > Sent: Saturday, October 28, 2017 8:42 AM > Subject: [AMRadio] Tek 535/545 vertical amp calibration question > > Hi, > > Apologies for the slightly off-topic post. > > I wonder if anyone has any tips for how to calibrate the vertical > amplifier on a Tektronics 535 and/or 545 oscilloscope without the EP53A > Gain Set Adaptor called for in the manuals' procedure? > > Thanks, > -Larry/NE1S > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to jcandela at prodigy.net > > > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to amvictor at ncsu.edu > From lexnonscripta at usa.com Sun Oct 29 21:43:31 2017 From: lexnonscripta at usa.com (mark) Date: Sun, 29 Oct 2017 20:43:31 -0500 Subject: [AMRadio] CQ 29.0MHz In-Reply-To: <59ef8db4.46b5630a.803a8.3462@mx.google.com> References: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> <001c01d33fa9$15b62d80$41228880$@charter.net> <59ef8db4.46b5630a.803a8.3462@mx.google.com> Message-ID: Just curious, do any of you guys ever do 6 Meter AM? I always wanted a Clegg Zeus. Thought they were pretty neat radios. Mark KD9CXH From ne1s at securespeed.us Mon Oct 30 06:47:56 2017 From: ne1s at securespeed.us (Larry Szendrei) Date: Mon, 30 Oct 2017 06:47:56 -0400 Subject: [AMRadio] CQ 29.0MHz In-Reply-To: References: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> <001c01d33fa9$15b62d80$41228880$@charter.net> <59ef8db4.46b5630a.803a8.3462@mx.google.com> Message-ID: <57ee176a-1f26-d874-ddee-72cfb5ad6e69@securespeed.us> On 10/29/17 9:43 PM, mark wrote: > Just curious, do any of you guys ever do 6 Meter AM? I always wanted a > Clegg Zeus. Thought they were pretty neat radios. > > Mark KD9CXH About 10 years ago or so there were a bunch of local hams here in southern Maine who got fired up about getting on 6M AM with the then-plentiful rigs of the 19050s and 1960s. There was a net every Thursday night, and you could generally find someone on 50.4 MHz just about any time of day to talk to. Interest has waned, though, and now I hear almost nothing. I'm guilty myself, because I didn't do my part to keep the frequency active. There are groups to the south of me that have regular get-togethers on 6M AM, I think 50.4, but they are just a little to far from me under normal conditions to make contact. I've listened when they're on, and sometimes I can just hear someone, but not enough to understand what's being said. The closer folks in that group have their antennas pointed away from me. My 6M/2M AM station is still all set up to go on a moment's notice; but with so little activity I barely listen anymore. 73, -Larry/NE1S From ka9p at aol.com Mon Oct 30 07:06:45 2017 From: ka9p at aol.com (Scott) Date: Mon, 30 Oct 2017 06:06:45 -0500 Subject: [AMRadio] CQ 29.0MHz In-Reply-To: <57ee176a-1f26-d874-ddee-72cfb5ad6e69@securespeed.us> References: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> <001c01d33fa9$15b62d80$41228880$@charter.net> <59ef8db4.46b5630a.803a8.3462@mx.google.com> <57ee176a-1f26-d874-ddee-72cfb5ad6e69@securespeed.us> Message-ID: <54D42DA9-138A-4782-8C5D-0ADD0D4B0DF2@aol.com> Mark, down south of you a bit in DuPage County the DuPage Amateur Radio Club runs a weekly 6 meter AM net followed by a 2 meter AM net, usually 4 or 5 check ins on each. Details can be found on the website, lots of vintage gear in use, and there is a local monitor receiver that can be listened to over the internet thru Broadcastify. 73 Scott Make something good happen! > On Oct 30, 2017, at 5:47 AM, Larry Szendrei wrote: > >> On 10/29/17 9:43 PM, mark wrote: >> Just curious, do any of you guys ever do 6 Meter AM? I always wanted a Clegg Zeus. Thought they were pretty neat radios. >> >> Mark KD9CXH > > About 10 years ago or so there were a bunch of local hams here in southern Maine who got fired up about getting on 6M AM with the then-plentiful rigs of the 19050s and 1960s. There was a net every Thursday night, and you could generally find someone on 50.4 MHz just about any time of day to talk to. Interest has waned, though, and now I hear almost nothing. I'm guilty myself, because I didn't do my part to keep the frequency active. > > There are groups to the south of me that have regular get-togethers on 6M AM, I think 50.4, but they are just a little to far from me under normal conditions to make contact. I've listened when they're on, and sometimes I can just hear someone, but not enough to understand what's being said. The closer folks in that group have their antennas pointed away from me. > > My 6M/2M AM station is still all set up to go on a moment's notice; but with so little activity I barely listen anymore. > > 73, > -Larry/NE1S > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ka9p at aol.com From w5jv at hotmail.com Mon Oct 30 10:30:17 2017 From: w5jv at hotmail.com (Doug Hensley) Date: Mon, 30 Oct 2017 14:30:17 +0000 Subject: [AMRadio] Tek 535/545 vertical amp calibration question Message-ID: Regards the "gain adjust adjapter", I have one by Tektronix marked as such but I see no "ep53" on it. Its clearly nice Tek product; nicely made, about 2 1/2" wide by maybe that much long. Can send a couple of pictures if anyone is interested. I also have a few of the vintage Tektronix probes fitted with banana plugs rather than probe tips. NOS. Doug W5JV From lexnonscripta at usa.com Mon Oct 30 11:18:19 2017 From: lexnonscripta at usa.com (mark) Date: Mon, 30 Oct 2017 10:18:19 -0500 Subject: [AMRadio] CQ 29.0MHz In-Reply-To: <54D42DA9-138A-4782-8C5D-0ADD0D4B0DF2@aol.com> References: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> <001c01d33fa9$15b62d80$41228880$@charter.net> <59ef8db4.46b5630a.803a8.3462@mx.google.com> <57ee176a-1f26-d874-ddee-72cfb5ad6e69@securespeed.us> <54D42DA9-138A-4782-8C5D-0ADD0D4B0DF2@aol.com> Message-ID: <25e81958-fcca-de0f-e625-cc8f4e72322d@usa.com> Hey Thanks Scott! I will have to see about that for sure. Anything AM for me :) And thank you to Jim who sent the Clegg Zeus info. I think the shipping on that would be as much as the radio! 73 Mark > Mark, down south of you a bit in DuPage County the DuPage Amateur Radio Club runs a weekly 6 meter AM net followed by a 2 meter AM net, usually 4 or 5 check ins on each. > > Details can be found on the website, lots of vintage gear in use, and there is a local monitor receiver that can be listened to over the internet thru Broadcastify. > > 73 Scott > > Make something good happen! > >> On Oct 30, 2017, at 5:47 AM, Larry Szendrei wrote: >> >>> On 10/29/17 9:43 PM, mark wrote: >>> Just curious, do any of you guys ever do 6 Meter AM? I always wanted a Clegg Zeus. Thought they were pretty neat radios. >>> >>> Mark KD9CXH >> About 10 years ago or so there were a bunch of local hams here in southern Maine who got fired up about getting on 6M AM with the then-plentiful rigs of the 19050s and 1960s. There was a net every Thursday night, and you could generally find someone on 50.4 MHz just about any time of day to talk to. Interest has waned, though, and now I hear almost nothing. I'm guilty myself, because I didn't do my part to keep the frequency active. >> >> There are groups to the south of me that have regular get-togethers on 6M AM, I think 50.4, but they are just a little to far from me under normal conditions to make contact. I've listened when they're on, and sometimes I can just hear someone, but not enough to understand what's being said. The closer folks in that group have their antennas pointed away from me. >> >> My 6M/2M AM station is still all set up to go on a moment's notice; but with so little activity I barely listen anymore. >> >> 73, >> -Larry/NE1S >> ______________________________________________________________ >> Our Main Website: http://www.amfone.net >> AMRadio mailing list >> Archives: http://mailman.qth.net/pipermail/amradio/ >> List Rules (must read!): http://w5ami.net/amradiofaq.html >> List Home: http://mailman.qth.net/mailman/listinfo/amradio >> Post: AMRadio at mailman.qth.net >> To unsubscribe, send an email to amradio-request at mailman.qth.net with >> the word unsubscribe in the message body. >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to ka9p at aol.com > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to lexnonscripta at usa.com > From donroden at hiwaay.net Mon Oct 30 12:47:53 2017 From: donroden at hiwaay.net (donroden at hiwaay.net) Date: Mon, 30 Oct 2017 11:47:53 -0500 Subject: [AMRadio] CQ 29.0MHz In-Reply-To: <25e81958-fcca-de0f-e625-cc8f4e72322d@usa.com> References: <001601d33ef8$4b919540$e2b4bfc0$@charter.net> <15ef40612a3-c0a-4356@webjas-vab082.srv.aolmail.net> <001c01d33fa9$15b62d80$41228880$@charter.net> <59ef8db4.46b5630a.803a8.3462@mx.google.com> <57ee176a-1f26-d874-ddee-72cfb5ad6e69@securespeed.us> <54D42DA9-138A-4782-8C5D-0ADD0D4B0DF2@aol.com> <25e81958-fcca-de0f-e625-cc8f4e72322d@usa.com> Message-ID: <20171030114753.Horde.ZBeT8Kyrsj5aDD7OV_jknUg@webmail.hiwaay.net> Let us crank up the old radios... I have an EF Johnson 6N2 begging to get back on the air. Don W4DNR Quoting mark : > Hey Thanks Scott! I will have to see about that for sure. Anything > AM for me :) > > And thank you to Jim who sent the Clegg Zeus info. I think the > shipping on that would be as much as the radio! > > 73 Mark >> Mark, down south of you a bit in DuPage County the DuPage Amateur >> Radio Club runs a weekly 6 meter AM net followed by a 2 meter AM >> net, usually 4 or 5 check ins on each. >> >> Details can be found on the website, lots of vintage gear in use, >> and there is a local monitor receiver that can be listened to over >> the internet thru Broadcastify. >> >> 73 Scott >> >> Make something good happen! >> >>> On Oct 30, 2017, at 5:47 AM, Larry Szendrei wrote: >>> >>>> On 10/29/17 9:43 PM, mark wrote: >>>> Just curious, do any of you guys ever do 6 Meter AM? I always >>>> wanted a Clegg Zeus. Thought they were pretty neat radios. >>>> >>>> Mark KD9CXH >>> About 10 years ago or so there were a bunch of local hams here in >>> southern Maine who got fired up about getting on 6M AM with the >>> then-plentiful rigs of the 19050s and 1960s. There was a net every >>> Thursday night, and you could generally find someone on 50.4 MHz >>> just about any time of day to talk to. Interest has waned, though, >>> and now I hear almost nothing. I'm guilty myself, because I didn't >>> do my part to keep the frequency active. >>> >>> There are groups to the south of me that have regular >>> get-togethers on 6M AM, I think 50.4, but they are just a little >>> to far from me under normal conditions to make contact. I've >>> listened when they're on, and sometimes I can just hear someone, >>> but not enough to understand what's being said. The closer folks >>> in that group have their antennas pointed away from me. >>> >>> My 6M/2M AM station is still all set up to go on a moment's >>> notice; but with so little activity I barely listen anymore. >>> >>> 73, >>> -Larry/NE1S >>> ______________________________________________________________ >>> Our Main Website: http://www.amfone.net >>> AMRadio mailing list >>> Archives: http://mailman.qth.net/pipermail/amradio/ >>> List Rules (must read!): http://w5ami.net/amradiofaq.html >>> List Home: http://mailman.qth.net/mailman/listinfo/amradio >>> Post: AMRadio at mailman.qth.net >>> To unsubscribe, send an email to amradio-request at mailman.qth.net with >>> the word unsubscribe in the message body. >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to ka9p at aol.com >> ______________________________________________________________ >> Our Main Website: http://www.amfone.net >> AMRadio mailing list >> Archives: http://mailman.qth.net/pipermail/amradio/ >> List Rules (must read!): http://w5ami.net/amradiofaq.html >> List Home: http://mailman.qth.net/mailman/listinfo/amradio >> Post: AMRadio at mailman.qth.net >> To unsubscribe, send an email to amradio-request at mailman.qth.net with >> the word unsubscribe in the message body. >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to lexnonscripta at usa.com >> > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to donroden at hiwaay.net From mjcal77 at yahoo.com Mon Oct 30 14:29:11 2017 From: mjcal77 at yahoo.com (CL in NC) Date: Mon, 30 Oct 2017 18:29:11 +0000 (UTC) Subject: [AMRadio] 6 Meter AM References: <160220309.6118726.1509388151235.ref@mail.yahoo.com> Message-ID: <160220309.6118726.1509388151235@mail.yahoo.com> We have a weekly very informal net here in the upstate of SC and the bottom of NC near the line. 50.4 on Tuesdays at 8PM. Check ins have run from just 2 or 3 to up to 10 on it's best days. When the band is open, there are many AM signals present, so much we had to QSY off 50.4, and we have worked into Nova Scotia as best DX so far. Ameco, Heathkit, Lafayette, Gonset, Polytronics, just about all the gear that had 6 meters included are present including a couple rice boxes in the group. Receiving systems are mostly converters, Ameco and Heath, and some receivers like Hammarlunds with 6 meters in them. I recently got a LW51 on the air paired up with a RME VHF 2-11 receiver. Was hoping to get them onto 2 meter AM as most of that gear was dual banded for 6 and 2, but nobody has been inspired yet. Charlie, W4MEC in NC From macklinbob at gmail.com Mon Oct 30 14:52:48 2017 From: macklinbob at gmail.com (K5MYJ) Date: Mon, 30 Oct 2017 11:52:48 -0700 Subject: [AMRadio] 6 Meter AM References: <160220309.6118726.1509388151235.ref@mail.yahoo.com> <160220309.6118726.1509388151235@mail.yahoo.com> Message-ID: I sure wish we had an interest in VHF AM here in the PNW! We do have a VHF Weak Signal group but they are almost strictly contest operators. Their weekly net checkins are just "HI, I'm still here, Goodbye"! I used to have several Heathkit VHF AM rigs but I sold them because there was no activity. But I could hear the local 6M FM repeater on the Shawnee. I kind of like the Pawnee and Shawnee. But I may look at some of the other 6&2 rigs. I do have a SB-301 with both the 6M and 2M converters and they do work on contest days. But it's all SSB. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message ----- From: "CL in NC via AMRadio" To: Sent: Monday, October 30, 2017 11:29 AM Subject: [AMRadio] 6 Meter AM > We have a weekly very informal net here in the upstate of SC and the > bottom of NC near the line. 50.4 on Tuesdays at 8PM. Check ins have run > from just 2 or 3 to up to 10 on it's best days. When the band is open, > there are many AM signals present, so much we had to QSY off 50.4, and we > have worked into Nova Scotia as best DX so far. Ameco, Heathkit, > Lafayette, Gonset, Polytronics, just about all the gear that had 6 meters > included are present including a couple rice boxes in the group. > Receiving systems are mostly converters, Ameco and Heath, and some > receivers like Hammarlunds with 6 meters in them. I recently got a LW51 > on the air paired up with a RME VHF 2-11 receiver. Was hoping to get them > onto 2 meter AM as most of that gear was dual banded for 6 and 2, but > nobody has been inspired yet. > > Charlie, W4MEC in NC > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to macklinbob at gmail.com From edwmullin at aol.com Tue Oct 31 15:30:15 2017 From: edwmullin at aol.com (Ed) Date: Tue, 31 Oct 2017 15:30:15 -0400 Subject: [AMRadio] 6 Meter AM In-Reply-To: <160220309.6118726.1509388151235@mail.yahoo.com> References: <160220309.6118726.1509388151235.ref@mail.yahoo.com> <160220309.6118726.1509388151235@mail.yahoo.com> Message-ID: I run a Hallicrafters SR-46. Rock bound on 50.2. Never hear much, though I leave the rig on a lot. VR, Ed Mullin > On Oct 30, 2017, at 2:29 PM, CL in NC via AMRadio wrote: > > We have a weekly very informal net here in the upstate of SC and the bottom of NC near the line. 50.4 on Tuesdays at 8PM. Check ins have run from just 2 or 3 to up to 10 on it's best days. When the band is open, there are many AM signals present, so much we had to QSY off 50.4, and we have worked into Nova Scotia as best DX so far. Ameco, Heathkit, Lafayette, Gonset, Polytronics, just about all the gear that had 6 meters included are present including a couple rice boxes in the group. Receiving systems are mostly converters, Ameco and Heath, and some receivers like Hammarlunds with 6 meters in them. I recently got a LW51 on the air paired up with a RME VHF 2-11 receiver. Was hoping to get them onto 2 meter AM as most of that gear was dual banded for 6 and 2, but nobody has been inspired yet. > > Charlie, W4MEC in NC > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to edwmullin at aol.com From donroden at hiwaay.net Tue Oct 31 15:49:14 2017 From: donroden at hiwaay.net (donroden at hiwaay.net) Date: Tue, 31 Oct 2017 14:49:14 -0500 Subject: [AMRadio] 6 Meter AM In-Reply-To: References: <160220309.6118726.1509388151235.ref@mail.yahoo.com> <160220309.6118726.1509388151235@mail.yahoo.com> Message-ID: <20171031144914.Horde.2HwGMUId2_E1-Xli6M0rfYT@webmail.hiwaay.net> Ed, I wouldn't expect that you would hear much on 50.2 unless the band is wide open and everyone has or is moving away from 50.4 Its hard to make 6 meter contacts, but you might have a fighting chance if you found a 50.4 crystal. Don W4DNR Quoting Ed via AMRadio : > I run a Hallicrafters SR-46. Rock bound on 50.2. Never hear much, > though I leave the rig on a lot. > > VR, Ed Mullin > > >> On Oct 30, 2017, at 2:29 PM, CL in NC via AMRadio >> wrote: >> >> We have a weekly very informal net here in the upstate of SC and >> the bottom of NC near the line. 50.4 on Tuesdays at 8PM. Check ins >> have run from just 2 or 3 to up to 10 on it's best days. When the >> band is open, there are many AM signals present, so much we had to >> QSY off 50.4, and we have worked into Nova Scotia as best DX so >> far. Ameco, Heathkit, Lafayette, Gonset, Polytronics, just about >> all the gear that had 6 meters included are present including a >> couple rice boxes in the group. Receiving systems are mostly >> converters, Ameco and Heath, and some receivers like Hammarlunds >> with 6 meters in them. I recently got a LW51 on the air paired >> up with a RME VHF 2-11 receiver. Was hoping to get them onto 2 >> meter AM as most of that gear was dual banded for 6 and 2, but >> nobody has been inspired yet. >> >> Charlie, W4MEC in NC >> ______________________________________________________________ >> Our Main Website: http://www.amfone.net >> AMRadio mailing list >> Archives: http://mailman.qth.net/pipermail/amradio/ >> List Rules (must read!): http://w5ami.net/amradiofaq.html >> List Home: http://mailman.qth.net/mailman/listinfo/amradio >> Post: AMRadio at mailman.qth.net >> To unsubscribe, send an email to amradio-request at mailman.qth.net with >> the word unsubscribe in the message body. >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to edwmullin at aol.com > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to donroden at hiwaay.net From kb2wig at twcny.rr.com Tue Oct 31 18:59:52 2017 From: kb2wig at twcny.rr.com (kb2wig at twcny.rr.com) Date: Tue, 31 Oct 2017 22:59:52 +0000 Subject: [AMRadio] 6 Meter AM In-Reply-To: Message-ID: <20171031225952.N79V9.244616.root@dnvrco-web21> 50.4 is where the AM action is. I doubt you'll hear much of anything on .2 unless when the band is open and the SSB ops spill over. KLC ---- Ed via AMRadio wrote: > I run a Hallicrafters SR-46. Rock bound on 50.2. Never hear much, though I leave the rig on a lot. > > VR, Ed Mullin From ranchorobbo at gmail.com Tue Oct 31 22:23:49 2017 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Tue, 31 Oct 2017 21:23:49 -0500 Subject: [AMRadio] Why modern gadgets vacuum your wallet when they break Message-ID: Your inability to troubleshoot and repair modern gadgets is intentional: https://spectrum.ieee.org/green-tech/conservation/why-we-must-fight-for-the-right-to-repair-our-electronics Save money--lead a gadget free life Rob K5UJ

This page last updated 12 Dec 2017.