[R-390] AGC Problems

[Sam Letzring]

I have a nice Stewart Warner 390A with a Collins IF  module.

I can't seem to get the AGC voltage I think I should get.

WIth 30- 40 uv RF in at 1.5 MHz I get plenty of IF output and > -10 =
volts output on the Diode load- but < -1 volt on the AGC line.

What should the AGC voltage be? I have seen values quoted upt to -10 =
volts?

Any ideas on what I should check? Have checked tubes and caps in the =
area of the AGC amps, detectors etc.

Any clues will be greatly appreciated.

Thanks

Sam


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