Quote:
Originally Posted by old_coot88
The POP mighta cleared a tin whisker.
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I know that I am 24 hours "late for the party" but that very symptom had me pulling my hair out on an Admiral 26R12. It was on the height control. The clue which I failed to pick up on was that varying the control did not change the voltage. The set started out good. But then there was a "POP" and I lost about half of the vertical height. To me, a lesson learned. I was not familiar with tin whiskers at that time. So, you may be good to go for that.
You may want to try brushing the controls G E N T L Y to get any tin whiskers away. They can be from the terminals to the control case and drive you crazy.