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Re: [Amps] L4B biasing

To: "" <>, "" <>
Subject: Re: [Amps] L4B biasing
From: "Steven Grant, W4IIV via Amps" <>
Reply-to: "Steven Grant, W4IIV" <>
Date: Thu, 25 Dec 2014 21:37:03 +0000 (UTC)
List-post: <">>
A 3-500 amp does not need bias unless it is run at 3000 volts or above. 200 
mills of idling current is normal for this amp 

     On Wednesday, December 24, 2014 4:45 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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