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Boater Sam · 7th Nov 2017, 8:37 pm

Thanks Al.
Thats more or less what I did, decoupled every HT feed, shunted IF filters etc.
It was suggested that this was due to IF getting into the HT line but if the grid stopper on the IF amp stops the oscillation I can't see that being the case.
I can't see how I could have reaction across the IF valve either, the set was in as built condition, no rewiring or caps.
Using the grid stopper brought about an instant fix, but why?
Its not valves either, all have been subbed.

7th Nov 2017, 8:37 pm	#15
Boater Sam Banned Join Date: Dec 2013 Location: Middlewich, Cheshire, UK. & Winter in the Philippines. Posts: 3,897	Re: Oh No! Not another howler. Thanks Al. Thats more or less what I did, decoupled every HT feed, shunted IF filters etc. It was suggested that this was due to IF getting into the HT line but if the grid stopper on the IF amp stops the oscillation I can't see that being the case. I can't see how I could have reaction across the IF valve either, the set was in as built condition, no rewiring or caps. Using the grid stopper brought about an instant fix, but why? Its not valves either, all have been subbed.