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1. [Amps] first time questions (score: 1): Author: Ulf Tjerneld <star@frizon.org>; Date: Sat, 16 May 2009 17:38:44 +0200; Hi all, I'm collecting parts for an amp-project. And I have som newbie questions: 1, Maybe this question is silly: When calculating the Pi network for an amplifier with GI7-B's I'm aiming for an unlo; /archives//html/Amps/2009-05/msg00091.html (7,496 bytes)
2. Re: [Amps] first time questions (score: 1): Author: Jeff Blaine <keepwalking188@yahoo.com>; Date: Sat, 16 May 2009 19:59:50 -0500; Ulf, To make the pi calculations, you should consider using the LOADED plate voltage. Idle plate voltage is not a factor. The difference, however, is not very much. Maybe 10-20%... And on #3, you are; /archives//html/Amps/2009-05/msg00095.html (9,320 bytes)
3. Re: [Amps] first time questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sat, 16 May 2009 22:30:54 -0400; To add to that IMD also gets worse as Ep is increased especially when it is operated above its published ratings for any class of operation. Carl KM1H _______________________________________________; /archives//html/Amps/2009-05/msg00096.html (10,785 bytes)
4. Re: [Amps] first time questions (score: 1): Author: Jeff Blaine <keepwalking188@yahoo.com>; Date: Sat, 16 May 2009 22:25:37 -0500; Carl, Righ you are. Yet here it's hard to know in the case of these tubes. They are pulse rated. So what is the "proper" high voltage? The GI7B range could be argued to run between 1800-9KV. Pretty b; /archives//html/Amps/2009-05/msg00097.html (12,276 bytes)
5. Re: [Amps] first time questions (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Sat, 16 May 2009 21:39:16 -0700; ORIGINAL MESSAGE: REPLY: The short answer is no, that is not enough voltage rating and here's why: When everything is tuned up correctly and not overdriven, the peak RF voltage will be almost exactly; /archives//html/Amps/2009-05/msg00098.html (8,663 bytes)
6. Re: [Amps] first time questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 17 May 2009 08:32:23 -0400; Many amps use Tune caps rated at 500-1500V higher than their unloaded voltage. The Heath SB-220 is about 600V difference and is known to arc under some tuning conditions. Some of this arcing voltage; /archives//html/Amps/2009-05/msg00100.html (10,002 bytes)
7. Re: [Amps] first time questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 17 May 2009 09:00:42 -0400; I have no definitive answer to this Jeff as my only experience with Russian tubes has been the 4CX400A used as replacements in commercial amps for expensive 8122's for instance. In a NCL-2000 they ha; /archives//html/Amps/2009-05/msg00101.html (15,610 bytes)

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