Bottlehead Kits > Paramount
Ecc81 red plating. [resolved]
Rob Capizzi:
Hey what's going on BH Friends? okay I recently purchased a pair
of Telefunken ECC 81 they've been working fine, they still work but
one I noticed is red plating on the plate that's on pin 9 side. Imoved
the red plating tube to the second amp and it did not follow so it
seems like the amp is red plating the tube What could be possibly
causing this? Thank you,
Paul Birkeland:
Can you post your voltages? Mostly you would want the I and O terminals on the A and B side of each board, as well as the Kreg pad on the half of the board that's populated.
Rob Capizzi:
Thanks, Paul. Ok i seenthe I and O i will measure. What is the kreg. Would you specify for me please? I'm assuming it's marked k?
Paul Birkeland:
Can you send a picture of the version you have? There were a few different ones...
Also if just this tube red plates, but no other 12AT7 tubes red plate, then just don't use this tube as it may have an issue.
Rob Capizzi:
I moved the red plating tube to amp 2 and it didn't redplate anymore. The tube tht ws in amp 2 that didn't red plate, red plated in amp 1
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