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This is the method I use to bias my amps. It’s not the only way to bias your output tubes, but I think it’s the safest and easiest method.
Essentially, you want to bias your amp such that the plate dissipation rating of the output tubes is not exceeded. Plate dissipation is measured in watts [...]

This vacuum tube amplifier project was inspired by the Spare Time Gizmo’s 6T9 tube amp. This got the ball rolling of ideas in my head and soon it was evolving from one idea to another. I decided to make the amplifier with a push-pull output stage using circuit ideas from my EICO HF-81 and my [...]