What your speaking of Don is shown in the following article.
http://www.qsl.net/wa5bxo/pptriodes/pptriodes.htm
This article was started some time ago, for what reason I don't
remember. I never had the chance to spend a lot of time with it so it
probably has a lot of mistakes. If anyone wishes to help with the
editing or add on something else please do so, mail it to me, and I will
of course put your name on it.
Another one, on SWR, I found that I forgot about is at
http://www.qsl.net/wa5bxo/swr/swr.htm
I think "BACON" had some input on this one but I'm sorry Bacon I can't
remember for sure. It's another one that probably needs some help.
John, WA5BXO
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Donald Chester
Sent: Sunday, January 02, 2005 5:11 PM
To: [email protected]
Subject: Re: [AMRadio] You Won't Believe This
>If you measure current from the filament transformer center tap to
ground,
>you'll have not only cathode current, but plate current, as well. Just
>look
>over at the grid current meter, subtract that from the plate meter, and
>there's
>your plate current, AND it's in a nearly ground potential position in
the
>series circuit.
Return the grid leak resistor and/or PA bias supply to filament xfmr ct.
instead of to ground, and your meter will read true plate current. If
it is
a screen grid tube, return the negative lead of the screen supply to
filament ct. as well.
Don k4kyv
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