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Soviet 6s3p-ev and EC86 Compatibility




Folks, my malfunctioning preamp among others is using 4 x 6s3p-ev tubes. I read that in some circuits they're interchangeable with the EC86, but in some they're not. The Vincent sa-7 owners have had good luck substituting the Soviet ones with ec86. I did that too. Everything was good, until I got a loud hiss in one channel a few weeks back.

Now, is it possible that the ec86 caused this? Before this particular set I'd been using different varieties of ec86 for 9 months, never had a single problem.

Attaching the diagram, the upper one is 6s3p-ev
Thanks

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Topic - Soviet 6s3p-ev and EC86 Compatibility - erik 08:18:25 01/10/21 (12)
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