03-12-2009, 08:27 AM
The oxide that forms on the type of metal used for the tube pins usually doesn't not respond to spray cleaners. Try emery cloth, fine sandpaper, etc.
It may not be the socket connection at all. I had a 42-327 that behaved in much the same way and it turned out to be a bad mica capacitor in the oscillator circuit. Wiggling or pulling/reinserting the tube would cause the oscillator to start and it ran fine. Just wouldn't start up on its own.
It may not be the socket connection at all. I had a 42-327 that behaved in much the same way and it turned out to be a bad mica capacitor in the oscillator circuit. Wiggling or pulling/reinserting the tube would cause the oscillator to start and it ran fine. Just wouldn't start up on its own.
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