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1. [Amps] Harris RF-110A AM-3924 (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sun, 18 Sep 2022 10:46:56 -0400 (EDT); _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2022-09/msg00031.html (6,314 bytes)
2. Re: [Amps] Harris RF-110A AM-3924 (score: 1): Author: Jim W7RY <jimw7ry@gmail.com>; Date: Sun, 18 Sep 2022 15:56:01 -0500; This is a blank email Paul Decker. On 9/18/2022 9:46 AM, Paul Decker wrote: _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/l; /archives//html/Amps/2022-09/msg00032.html (7,042 bytes)
3. [Amps] Harris RF-110A AM-3924 (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 19 Sep 2022 11:17:07 -0400 (EDT); Hello group. I'm getting ready to bring a 40+ year old RF-110A online. I kept the low voltage portion intact for the filiment, bias, and the 400 Hz chopper to the lower. I've gutted the old 3phase po; /archives//html/Amps/2022-09/msg00033.html (8,056 bytes)
4. Re: [Amps] Harris RF-110A AM-3924 (score: 1): Author: Victor Rosenthal 4X6GP <k2vco.vic@gmail.com>; Date: Mon, 19 Sep 2022 18:33:58 +0300; <snip> Step 2. With filiment, apply 500v grid to the 4cx1500's but no plate, and 500 v plate to the 8122's let that soak for a while, <snip> NEVER DO THIS! If you apply screen voltage without plate v; /archives//html/Amps/2022-09/msg00034.html (7,562 bytes)
5. Re: [Amps] Harris RF-110A AM-3924 (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Tue, 20 Sep 2022 10:22:10 -0400 (EDT); Thanks Victor, For some reason, I was thinking I read the opposite. Would it then just be better to apply both screen and full or reduced plate voltage? Paul. ________________________________________; /archives//html/Amps/2022-09/msg00035.html (8,070 bytes)
6. Re: [Amps] Harris RF-110A AM-3924 (score: 1): Author: "Peter Voelpel" <dj7ww@t-online.de>; Date: Tue, 20 Sep 2022 17:26:00 +0200; The 500V are not the 1500B screen voltage, they are the plate voltage for the 8122 and feed the screen regulator which supplies about 300V for the 1500B screens and 225V for the 8122 screens. But nev; /archives//html/Amps/2022-09/msg00036.html (8,807 bytes)
7. Re: [Amps] Harris RF-110A AM-3924 (score: 1): Author: Victor Rosenthal <k2vco.vic@gmail.com>; Date: Tue, 20 Sep 2022 19:10:43 +0300; I don't know if there is anything to be gained by running with reduced plate/screen voltage. These tubes are not gettered by heating the plates like 3-500Zs, so I don't know what the advantage would; /archives//html/Amps/2022-09/msg00037.html (9,093 bytes)
8. Re: [Amps] Harris RF-110A AM-3924 (score: 1): Author: "jtml@losalamos.com" <jtml@losalamos.com>; Date: Tue, 20 Sep 2022 14:03:37 -0600; You can put negative bias V on control grid, with filament is hot. Avoid positive screen grid bias, however, unless there is some plate voltage first. The electron beam will otherwise all land on the; /archives//html/Amps/2022-09/msg00038.html (14,142 bytes)
9. [Amps] Harris RF-110A AM-3924 (score: 1): Author: "jim.thom jim.thom@telus.net" <jim.thom@telus.net>; Date: Fri, 23 Sep 2022 09:45:41 -0700; NEVER DO THIS! If you apply screen voltage without plate voltage, screen current will go through the roof and destroy the screen! Always ensure plate voltage is present before applying screen voltage; /archives//html/Amps/2022-09/msg00039.html (8,134 bytes)

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