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1. [Amps] Using old amps on WARC query (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sun, 30 Jun 2013 11:39:30 +0000; Please anyone can tell me the factors to consider, including burning tank components, when operating old linear amplifiers on the WARC bands, especially 12 meters. Alpha 76 PAC meaning the 3 tube ver; /archives//html/Amps/2013-06/msg00271.html (7,291 bytes)
2. Re: [Amps] Using old amps on WARC query (score: 1): Author: "Larry" <lknain@nc.rr.com>; Date: Sun, 30 Jun 2013 08:01:19 -0400; I am no expert on this. I have a Dentron Clipperton-L that I had applied the 10M fix to it years ago. But I fried the parasitic suppressors when working WARC bands. At the suggestion of several on th; /archives//html/Amps/2013-06/msg00273.html (8,735 bytes)
3. Re: [Amps] Using old amps on WARC query (score: 1): Author: Kevin Stover <kevin.stover@mediacombb.net>; Date: Sun, 30 Jun 2013 07:44:32 -0500; If I'm not mistaken the Titan, model 425, was designed "WARC ready". It needed a mod to make it work above 23MHz but you say the mod has been done. On 6/30/2013 6:39 AM, Charles Harpole wrote: Please; /archives//html/Amps/2013-06/msg00274.html (8,086 bytes)
4. Re: [Amps] Using old amps on WARC query (score: 1): Author: "Pete N4KW" <n4kwpete@centurylink.net>; Date: Sun, 30 Jun 2013 09:09:58 -0400; I have an old Alpha 78, one in the same as the 76 except for the "Bandpass tuning" I believe. My 78 works fine on 18 meters using the manual tuning and bandswitch on 21 mhz. 73 Pete N4KW Please anyon; /archives//html/Amps/2013-06/msg00275.html (8,249 bytes)
5. Re: [Amps] Using old amps on WARC query (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sun, 30 Jun 2013 10:34:57 -0400; I know it has been reported on this reflector that some old amps made the mistake (in retrospect) of parking the resonance of the plate RFC at 24 MHz. The Ameritron RFC substitution seems like a good; /archives//html/Amps/2013-06/msg00276.html (9,842 bytes)
6. Re: [Amps] Using old amps on WARC query (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sun, 30 Jun 2013 10:45:43 -0400; I believe the early PA76 series amps *all* had plate chokes resonant at 25 MHz and will not work on 12 meters. It's been a long time since I last looked at one. 73, ... Joe, W4TV Please anyone can te; /archives//html/Amps/2013-06/msg00277.html (8,620 bytes)
7. Re: [Amps] Using old amps on WARC query (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 30 Jun 2013 12:06:30 -0400; The Clipperton L had 2 different chokes, the short fat one that requires the top 3-4 turns removed and also used on the MLA-2500, DTR-2000L and some others. The later is a tall solenoid wound which a; /archives//html/Amps/2013-06/msg00279.html (10,468 bytes)
8. Re: [Amps] Using old amps on WARC query (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 30 Jun 2013 09:08:32 -0700; I think the Titan 425 first came on the scene before the WARC bands were announced. I have three 425s of slightly different vintages. All three work fine to produce rated power on 17M and 12M with th; /archives//html/Amps/2013-06/msg00280.html (8,505 bytes)
9. Re: [Amps] Using old amps on WARC query (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 30 Jun 2013 12:59:33 -0400; I have a mid production 76PA 3 holer that needed a change. Havent seen any with a later choke which may have been from a 78 sold later as a retrofit. Carl KM1H I believe the early PA76 series amps *a; /archives//html/Amps/2013-06/msg00281.html (10,555 bytes)
10. Re: [Amps] Using old amps on WARC query (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 30 Jun 2013 12:59:52 -0400; I dont think it was a mistake as many were sold new to CBers back when a ham license didnt have to be shown. To manufacturers the bottom line was the bottom line. Carl KM1H I know it has been reporte; /archives//html/Amps/2013-06/msg00282.html (11,566 bytes)
11. Re: [Amps] Using old amps on WARC query (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 30 Jun 2013 12:59:54 -0400; Please anyone can tell me the factors to consider, including burning tank components, when operating old linear amplifiers on the WARC bands, especially 12 meters. Alpha 76 PAC meaning the 3 tube ver; /archives//html/Amps/2013-06/msg00283.html (9,869 bytes)
12. Re: [Amps] Using old amps on WARC query (score: 1): Author: Gregory Beat <gregory.beat@comcast.net>; Date: Sun, 30 Jun 2013 13:02:34 -0500; Starting with questions, and GOOD RESEARCH is the correct approach for older radio equipment (transceivers) and HF Linear Amplifiers. The Alpha 76 Plate Choke (factory) is resonant at 12 meters (and; /archives//html/Amps/2013-06/msg00284.html (8,737 bytes)

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