PY 81 as power rectifiers?

[Amie]

Looks good.

One tip: wire up your mains transformer, to valve heaters. Wire up your output transformer to your loudspeaker. Switch on.

You may notice a hum in the speaker. It's because there is a small AC field from the mains transformer, which the output transformer picks up. If so, move the transformers around a bit, for minimum hum. You may find turning one you can find a zero position. Only then, mark and drill the positions for the fixing holes.

Thanks lots!
I was concerned about hum from the transformer and choke field, so was prepared for the chassis to be a "practice" one. Uncle Don said similar to you, but to screw the inductors to a board and connect the lashup to them to experiment.

It didn't occur to me to run the heater transformer and just wire the speaker to the op transformer for the same test.....
'Spose the chassis I've made may work out OK....

I was also going to earth the chassis metal work, and provide an 0V buss, (for safety more than anything else), will this be likely to cause problems?
Thanks,
Amie.