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Original Message

RE:Is this a single ended amp?

Posted by DAK on March 24, 2017 at 19:34:43:

If yes, you can use the recommendations for an el34 to start with. If a push pull amp you can start with something like an EICO HF89 which is set at 63ma for 2 tubes, if my memory is correct.
You should install 10ohm current sensing resistors on the power tube cathodes to find what the idle current is if your amp doesnt have them.