If, as others have suggested, the Mute jumper is in place on the rear, and the noise blanker (or the jumper) is installed, and the tubes are removed and reseated, and it's still dead, I would use another receiver, tuned to the R4C IF frequencies, to see if
you can trace the signal and find out where it seems to fail.? Then you would know where to focus your attention.? Easiest to do this if the R4C is tuned to a known strong signal.? (Be careful, of course, not to touch the antenna input of the other receiver
to any DC voltage within the R4C.)
-- Art Delibert, KB3FJO
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Hello:
I have a Drake R4C that went through the WB4HFN full service option about 5 years ago. It hasn't been hardly used at all.
Now when I powered it up on a variac, I get power but no signals, no audio, no nothing.
I find it hard to believe that this happened just by sitting. It was covered with a dust cover the entire time in a temp-controlled room.
Is there something I can try? I tried FUNCTION ON, and every setting imaginable. All tubes are lit (but not tested recently).
I plugged in the long gray cord on the MS4/AS4 combo but got no sound. Neither did I get sound from the front headphones.
Ideas?
Thanks
Scott N1IA
