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Old March 12th 06, 11:30 AM posted to rec.radio.amateur.homebrew
Samuel Hunt
 
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Default 4CX250B 2m linear circuit? (Class C ideally!)

Hi all.

I'm trying to find a good circuit for a Class C 4CX250B linear.

I've found a few for multiple valves in Class A, but I'm after just a simple
circuit that shows a 4CX250B linear for 2m with Class C biasing.

Idea is to use it for a little project where I want to run about 100W, but
run it cleanly without all the RF hash that transistor amps give.


Can anyone point me in the right direction?

Also, how would you go about varying the RF power output on a 4CX250B linear
in class C? Is it by varying the 1.2kV supply voltage, which would make
sense, or is there some other recommended way?


Sam