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Re: [Amps] Quad Tube 4cx800 hf amp

To: "Leigh S. Jones, KR6X" <kr6x@kr6x.com>, <amps@contesting.com>
Subject: Re: [Amps] Quad Tube 4cx800 hf amp
From: jkearman@att.net (Jim Kearman)
Date: Fri, 26 May 2006 04:25:34 +0000
List-post: <mailto:amps@contesting.com>
> You've got some problems.  First of all, the tube is good for 2 KV DC and 
> pushing it to 2.6 KV would not be recommended.

FWIW, both Alpha and Ten-Tec amps run the 4CX800A at >2000 V. In both cases I 
believe the loaded Ep is ~2700 V. The Peter Dahl replacement transformer for 
the Alpha 87A has a 2050-Vac secondary, which should provide ~2900 Vdc 
unloaded. The Svetlana datasheet for the 4CX800A gives a maximum plate voltage 
of 2500.

73,

Jim, KR1S
http://kr1s.kearman.com/ 
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