Re: RCA AR88D Comms Receiver.
just a thought. Has the frequency changer/osc valveholder become conductive or leaky. I have experienced this a few times with paxolin holders in television RF units.
It takes more than just a few hours heating to deep dry oscillator/IF coils and particularly their formers and some never recover. You appear to have checked everything else. Good luck with it! John.
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