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1. [Amps] How do I determine Class (score: 1): Author: Jim Isbell <millenniumfalcon@cableone.net>; Date: Tue, 31 Aug 2004 20:54:36 -0500; On pages 202-205 of the 1956 "Radio Amateurs Handbook" (ARRL) there is an amplifier described called "Parallel Tetrodes in a High Power Amplifier" How do I, from that description and schematics etc.,; /archives//html/Amps/2004-08/msg00484.html (6,739 bytes)
2. Re: [Amps] How do I determine Class (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Tue, 31 Aug 2004 20:32:59 -0700; Jim Isbell wrote: On pages 202-205 of the 1956 "Radio Amateurs Handbook" (ARRL) there is an amplifier described called "Parallel Tetrodes in a High Power Amplifier" How do I, from that description an; /archives//html/Amps/2004-08/msg00486.html (8,612 bytes)
3. Re: [Amps] How do I determine Class (score: 1): Author: R.Measures <r@somis.org>; Date: Tue, 31 Aug 2004 21:56:01 -0700; On Aug 31, 2004, at 8:32 PM, Vic Rosenthal wrote: Jim Isbell wrote: On pages 202-205 of the 1956 "Radio Amateurs Handbook" (ARRL) there is an amplifier described called "Parallel Tetrodes in a High P; /archives//html/Amps/2004-09/msg00001.html (7,718 bytes)
4. Re: [Amps] How do I determine Class (score: 1): Author: Jim Isbell <millenniumfalcon@cableone.net>; Date: Wed, 01 Sep 2004 10:22:05 -0500; This is EXACTLY the answer I needed. The amp uses a pair of 4-125As and the screens are at "350V - 400V" Plates at "2000V - 3000V" (but no terminating resistor) so I guess that makes it a class AB1 l; /archives//html/Amps/2004-09/msg00008.html (7,909 bytes)
5. Re: [Amps] How do I determine Class (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 1 Sep 2004 09:59:29 -0700; On Sep 1, 2004, at 8:22 AM, Jim Isbell wrote: This is EXACTLY the answer I needed. The amp uses a pair of 4-125As and the screens are at "350V - 400V" Plates at "2000V - 3000V" (but no terminating re; /archives//html/Amps/2004-09/msg00015.html (8,745 bytes)
6. Re: [Amps] How do I determine Class (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 01 Sep 2004 17:19:19 -0400; At 09:59 AM 9/1/2004 -0700, R.Measures wrote: On Sep 1, 2004, at 8:22 AM, Jim Isbell wrote: This is EXACTLY the answer I needed. The amp uses a pair of 4-125As and the screens are at "350V - 400V" Pl; /archives//html/Amps/2004-09/msg00024.html (10,348 bytes)
7. Re: [Amps] How do I determine Class (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 1 Sep 2004 18:18:07 -0700; On Sep 1, 2004, at 2:19 PM, Bill Fuqua wrote: At 09:59 AM 9/1/2004 -0700, R.Measures wrote: On Sep 1, 2004, at 8:22 AM, Jim Isbell wrote: This is EXACTLY the answer I needed. The amp uses a pair of 4; /archives//html/Amps/2004-09/msg00033.html (10,082 bytes)
8. Re: [Amps] How do I determine Class (score: 1): Author: Jim Isbell <millenniumfalcon@cableone.net>; Date: Thu, 02 Sep 2004 08:04:26 -0500; Thanks to everyone for the answers on the 4-125 amp. Looks like I will have to redesign the thing before I can use it. _______________________________________________ Amps mailing list Amps@contestin; /archives//html/Amps/2004-09/msg00038.html (7,709 bytes)
9. Re: [Amps] How do I determine Class (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 02 Sep 2004 09:43:22 -0400; I think it has to do with the close proximity and precise alignment of the screen grids with the control grids so that screen grids are in the electron shadow of the control grids. I have not given i; /archives//html/Amps/2004-09/msg00041.html (12,769 bytes)
10. Re: [Amps] How do I determine Class (score: 1): Author: R.Measures <r@somis.org>; Date: Thu, 2 Sep 2004 07:40:46 -0700; On Sep 2, 2004, at 6:43 AM, Bill Fuqua wrote: I think it has to do with the close proximity and precise alignment of the screen grids with the control grids so that screen grids are in the electron s; /archives//html/Amps/2004-09/msg00043.html (11,057 bytes)
11. Re: [Amps] How do I determine Class (score: 1): Author: Jim Isbell <millenniumfalcon@cableone.net>; Date: Thu, 02 Sep 2004 10:25:35 -0500; In this particular case, Yes. The procedure is detailed in the article. R.Measures wrote: Was the amplifier neutralized? Richard L. Measures, AG6K, 805.386.3734. www.somis.org _______________________; /archives//html/Amps/2004-09/msg00049.html (8,681 bytes)
12. Re: [Amps] How do I determine Class (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Thu, 02 Sep 2004 12:07:55 -0400; Bill, I was reading about this a while back. If I recall, the spacing between the screen grid and the anode in power tetrodes help control secondary emission reaching the screen from the anode. If yo; /archives//html/Amps/2004-09/msg00051.html (10,469 bytes)
13. Re: [Amps] How do I determine Class (score: 1): Author: R.Measures <r@somis.org>; Date: Thu, 2 Sep 2004 10:42:30 -0700; On Sep 2, 2004, at 9:07 AM, Will Matney wrote: Bill, I was reading about this a while back. If I recall, the spacing between the screen grid and the anode in power tetrodes help control secondary emi; /archives//html/Amps/2004-09/msg00052.html (9,336 bytes)
14. Re: [Amps] How do I determine Class (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 02 Sep 2004 13:37:21 -0400; At 12:07 PM 9/2/2004 -0400, Will Matney wrote: Bill, I was reading about this a while back. If I recall, the spacing between the screen grid and the anode in power tetrodes help control secondary emi; /archives//html/Amps/2004-09/msg00053.html (11,881 bytes)

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