Quote:
Originally Posted by DavGoodlin
The H-output tubes (6KD6, 6JS6 etc) do appeal to Ham transmitter builders too.
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What initially made those expensive was the CB crowd and their often illegal high wattage 'linear' amplifiers which ran TV horizontal sweep tubes as outputs WAY beyond their recommended power ratings, forcing them to 'retube' frequently and thus depleting the supply even before the TV sets that used those tubes were at the end of their expected lifetimes.