They'd probably be fine for the modulators in a class B audio P-P curcuit.
They need a grid bias supply to set them idling OK. And probably a good
dose of negative feedback around the modulator, like Gates and RCA used to
do in their AM Tx's.
Personally I loved the 833's cause they look so strange with no socket. I
bet a lot of hams are going that way for high power AM. Amazing. I just
finished looking at a copy of the latest Electric Radio pub, and
admiring the Heathkit Chippewa with a pair of 4-400's in AB1. Now that's nice.
>I had an industrial amp that used 4 of them John....sold the tubes since
>they are in industrial demand and kept the goodies. Would you consider
>them as modulator tubes? With AM growing that may be an option for ham
>use anyway.
My W. T. LaRose Thermall RF heater has one 5868 in TPTG (tuned plate tuned
grid) oscillator arrangement at 90 Mhz or so.
John
K5PRO
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