I use standard easy to do zener bias. There are plenty of examples on the net.
Search for QRO and go to the amplifier section. There are plenty of other ways
also and maybe mo better. It sounds to me like your exciter needs to be
isolated for dc from the cathode.
K6KWQ Dick "12 Volt radios are for wimps, real radios can kill you" Still can't
make it go QRO with "More Power"
----- Original Message -----
From: hahn
To: amps@contesting.com
Sent: Monday, February 23, 2004 4:24 PM
Subject: [Amps] Bias Whoes
Anybody know anything about the russian tubes??? The GI7BTs??? I have a
schematic of the way I wired tubes for bias but have scanned in to look
at and comment and maybe help? I can't get tubes to have idle current
of 100ma. every time I key its "MAX" current on the plate, even without
any audio input to transceiver. Maybe I am doing something wrong on the
input? Chuck AI4BB
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