Hi Phil and Co.
> Thank you to everyone who helped me out. I'll see if I can
> muster a copy of the 1975 and 1978 ARRL Manuals as this
> seems a good place to start as well as the Net, possibly.
> The only reason I've been thinking of a dual 4CX250B amplifier is;
I was under the impression you were particular to use only two
tubes. The older ARRL, Radio Amateurs VHF Manual has a
50MHz three tube 4cx250B amplifier. The tubes are horizontal
and the construction of the amplifier could be done with more
modern techniques, but the basic circuit is a winner. If that gets
your motor going, I could scan the amp diagram or mail you photocopy.
> 1. I've got a number of 250B's in the junk box, along with some VHF
> bases and associated bits to make a basic PSU.
They breed in the drawers, like paper clips and coat hangers in the
closets.
> 2. I've got some (but limited) knowledge and experience of the tube.
A real worker when properly applied. I run the anode voltage slightly
higher than the mfgrs choice, but I've never had one fail, ever.
cheers
skipp
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