Thread: ECL86 issues
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Old 5th Sep 2019, 2:14 pm   #1
AD360 Rob
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Join Date: Jun 2012
Location: Chester, Cheshire, UK.
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Default ECL86 issues

Afternoon all, whilst servicing one of the hacker cavaliers I have, I noticed severe distortion after a while. Checking valve voltages lead me to the grid of the pentode section of one of the push pull pair, it was reading several volts. (I had already replaced the grid coupling caps) swapping the suspect valve with its partner made the voltage follow the valve so I obtained another (used but tested good). This one while better still has a volt and a half on the grid after about 5 mins of operation. Are ECL86s prone to internal leakage like the good old UL41?

Thanks
Rob
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