[Ron Ramirez]

David

How are you setting up your output meter?

It is perfectly acceptable to connect the output meter between plate and B+ of the output tube...in other words, across the primary. In fact, this is preferred to connecting your meter across the speaker voice coil.

But you are not measuring DC voltage; you want to measure AC voltage across the output transformer primary.

Same thing if you connect the output meter across the speaker voice coil - you want to measure AC voltage, and it will be a low voltage.

If the reading does not change when varying the level of the volume control or the signal level...then something is wrong with your output meter.