Quote:
Originally Posted by Tubejunke
I should have just recapped this set, but I wanted to repair it first and see what I have, then consider a full or partial recap. Can someone advise me on what would cause this climb in cathode current and am I going to fry the flyback.
|
Hi Tubeguy ,
Any time I've encountered runaway cathode current , it has always been found to be either the grid circuit capacitors failing and driving the grid positive or a bad tube as old coot suggested . I've seen both gassy and tubes that have developed "secondary grid emission" do the runaway cathode current thing , but mostly find it in the capacitors slowly going partially shorted .