You just might want to look at Eimac's spec sheet.
http://frank.pocnet.net/sheets/140/3/3-500Z.pdf
Carl
KM1H
----- Original Message -----
From: "Steven Grant, W4IIV via Amps" <amps@contesting.com>
To: <mikflathead@aol.com>; <amps@contesting.com>
Sent: Thursday, December 25, 2014 4:37 PM
Subject: Re: [Amps] L4B biasing
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
<amps@contesting.com> 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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