Bottlehead Kits > Crack-a-two-a
OB voltage low on one board
Happy Ghost:
Hello,
I was doing a voltage check on my C2A after a long time. Everything is in spec except OB voltage on one side. It was reading 78.2 V while on the other side it is closer to 88V. Is the 78V something to be worried about? The manual says it should be between 90 - 110V…
Thanks!
Paul Birkeland:
If this is on the center PC board, that is OK.
Happy Ghost:
Hello PB..
This was on the high current board.. Not the center one unfortunately..
All the other voltage measurements are spot on.. FWIW I am trying out a new (NOS) 12AU7 .. Could that have any impact?
Thanks for all your help!
Paul Birkeland:
What are the OA and OB voltages on the center C4S board?
This voltage that you've measured indicates an issue, but without knowing all the voltages, it's hard to say what it may or may not mean.
Happy Ghost:
Oh ok.. I’ll post the voltage readings later today.. Ty!
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