Adding a "tune" mode to an AM RF PA with a pair of 4-400s. What's
better... floating the screens or grounding the screens. Does it matter?
To round out the picture: no bias supply (grid leak bias only), screen E
derived via dropping R from plate B+
I have a relay that will easily handle the screen voltage and plan to switch
in a suitable R in place of the screens to keep the voltage coming into the
RF deck near normal screen value. I don't foresee it ever being 'hot
switched' - It probably wouldn't last too many cycles at 3KV. I don't want
to mess with a clamp tube.
THX & 73, Bill N2BC
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