Tube Amp Archive

Thanks for the doc Martin. You may be able to help with somewhat related questions. How do I calculate my actual output power in RMS for both tubes in a class A/B? Or more specifically do I need to bias my tubes lower so I don't exceed my OT rating in RMS. My actual situation is that I am running my...

I had the same problem with AAE 102. Make sure your speaker is plugged into spk2, the 12a jack. If you plug into spk1 it will send everything to ground and suck current like a MF.

For biasing see Uncle Doug’s you tube video on grid biasing. It’s very good.