Quote:
Originally Posted by Electronic M
If it uses the same 30s 5-pin socket/base as a type 76 tube (common speaker plug into the octal era) then it is in a way keyed such that it only plugs in one way. There's 4 pins closely clustered and a 5th pin off a ways....pin spacing is not symmetrical in both axes so it will only plug in one way (unless you break it).
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Well that's the thing the plug coming out of the radio itself is broken, it's broken on one of the sides that has the close together pins.
But I think though that more than likely it's the hum bucking coil, that's bad, like I already suggested, I was just throwing that out there as an alternative idea.