"Brenda Ann" wrote in message
...

"William Sommerwerck" wrote in message
. ..

Based on what I can figure out, the plate current is 1mA. That should
put the cathode voltage at 60V, not 70V -- which still seems rather high.
I assume you've checked the obvious stuff like the resistor values.

Indeed I have. In fact, every component but the tube itself in the circuit
is new, as I had to rebuild the power supply, first audio, driver, output,
detector and AGC circuits back to factory design. This one's a puzzle
for me. The voltages on that stage are strange. Plate voltage is quite
high, IIRC, around 240 volts, and the grid is at essentially zero. It's
all
supposed to be a part of that squelch circuit, I'm sure... perhaps it's
staying in the squelched mode for some reason.

I like to say that "science" is not about "facts", but about asking the
right questions. I think you've made the right observation -- the unit is
stuck in squelch mode.

One other possibility... double-check your wiring. (No offense intended.)