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Re: [Amps] L4B biasing

To: "" <>
Subject: Re: [Amps] L4B biasing
From: Vic Rosenthal <>
Date: Thu, 25 Dec 2014 07:41:40 +0200
List-post: <">>
According to the 3-500z data sheet, this should be fine. The 200 ma seems a 
little low, but I guess it depends on the tubes. You should make sure that you 
can get rid of the heat.

Vic K2VCO /4X6GP 

> On Dec 24, 2014, at 10:52 PM, mike via Amps <> wrote:
> I just finished me Drake power supply. I used a Drake transformer and a 
> doubler board with 8 caps. I have 2600 volts showing on the high voltage 
> meter. I have eliminated all the bias circuit in the power supply that Drake 
> used. At idle I show  200 mills of plate current. My question is should I add 
> a bias circuit? I purchased a W4ZT board but wonder if I need it. Thanks and 
> Happy Holidays to all.
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