Hello,

What things should be considered to choose the best output transformer for a
given tube and situation?

If low output impedance is important for good speaker damping and control,
why won't all amps just use output transformers with the biggest possible
primary winding impedance? That would give the biggest output transformer
impedance ratio and lowest output impedance of the amp.

Since it doesn't seem to be this way, what other considerations are there?
Tube type, Plate voltage, etc?

If I wanted to make a class A push-pull power triode amp with a 300B output
tube, run at 400V Vp, what would be the best output transformer primary
impedance to use, secondary impedance is going to be 4ohms.

Thanks!

-at