Quote:
Originally Posted by mole42uk
I think I finally cracked the problem with my Sussex and EL34s.
Putting a scope on the anode voltage I found that it oscillated madly when testing any EL34. Putting my hand around the valve (before it got too hot!) stopped the oscillation and the meter readings became steady.
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Blimey! What fantastic news. I only just saw this two months late but really glad you posted it. I will try the same on mine.