Those Russian tubes can be had here cheap as chips on the local ham fests.
Some use them to make H.F amps cheap, 600 - 800 watts out, we can use 400 watts PEP here, so they always run within specs.
http://www.xs4all.nl/~pa0fri/Lineair...0/FRI750uk.htm
Including one with the GI7B
"If the Republicans will stop telling lies about the Democrats, we will stop
telling the truth about them." - Adlai Stevenson (1900-1965)
“I’m not liberal/conservative, I’m anti-idiotarian.”
At some point in the last 20 years, the left moved to the center, and the right moved into a mental institution
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