Re: Oh No! Not another howler.
Probably most AC41's don't do it, but with a borderline condition such as a subtle amount of tube gas or heater cathode leakage, its enough to trip it off. I agree though, all the usual suspects should be checked first. It might be though that in this set, one of the IF coils was made with accidental reverse polarity, could be just enough to do it in conjunction with other factors.
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