I was just wondering if anyone out there might have a schematic of an
amplifier using a single 4-400 tube in grounded grid configuration that
they might have constructed or even a website with one? It doesn`t have
to have tuned input or power supply with it. I can do the math and
figure out values for it, but thought I might check and save myself some
time. Thanks for any info, Rob WB8VWI
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An RF Power amp. for the HF bands with 2 4-400's in grounded grid
configuration can be found in ARRL Handbook 1986 , pages 30-40 and 30-41.
Input circuit is very simple ,perhaps too simple for a solid state front end
transceiver.
In the old days with valve transceivers having their own PI tank tuning
,this was acceptable.
Suggest you also have a look at AG6K's web site which has a lot of info re
RF power amplifiers with valves.


Frank GM0CSZ / KN6WH