[Amps] L4B biasing

Paul Baldock paul at paulbaldock.com
Wed Dec 24 16:23:12 EST 2014


Yes you should add bias. I added 11 diodes in the center tap of the 
filament trany. So that would be about 7 volts.

- Paul

.At 12:52 PM 12/24/2014, you 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.
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps


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