[Amps] twin 4CX-10 000D amplifier: multiple tubes

[PA3DUV]

Rich,

For the single bander they might get away with it.
But I've seen multiband designs of the same origin  which catched fire due 
to oscillation of the amp.

Cheers, Dick
PA3DUV

----- Original Message ----- 
From: "R L Measures" <r at somis.org>
To: "PA3DUV" <pa3duv at planet.nl>
Cc: <amps at contesting.com>
Sent: Monday, May 29, 2006 10:02 PM
Subject: Re: [Amps] twin 4CX-10 000D amplifier: multiple tubes


> Not directly-grounding the screen collet of a 4cx10,000D is an  invitation 
> to a squirrel invasion.
>
> On May 28, 2006, at 1:06 PM, PA3DUV wrote:
>
>> Gentlemen,
>>
>> For those interested in the design of HF power amplifiers this web  page 
>> might be of interest:
>>
>> http://66.249.93.104/translate_c?hl=en&ie=UTF-8&oe=UTF-8&langpair=ja 
>> %7Cen&u=http://www.iizuka-net.ne.jp/~bear-el/10000d-2&prev=/ 
>> language_tools
>>
>> or without the translator:
>>
>> http://ns.iizuka-net.ne.jp/~bear-el/10000d-2/
>>
>> This single band 7 MHz amp for amateur usage is conservatively  rated at 
>> 20 kW output. Exciter is an Icom IC7800.
>> According to the builder of the amp is does 20 kW out without  abnormal 
>> blower noise levels or a burning smell from the RF deck. A  30 kVA 3 
>> phase power supply is used, generating an unloaded B+ of 8  kV DC.
>>
>> Cheers, Dick
>> PA3DUV
>>
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>>
>
> R L MEASURES, AG6K. 805-386-3734
> r at somis.org
>
>
>