[Steve_P]

If you can see a glow with these valves, you're seriously overrunning them. They should also come 'straight on'.

Does this set have series or parallel valve heaters? (I'm not at home, so not got a circuit handy.) Usually parallel, but sometimes series.

Apart from the lower voltages and heaters being a bit different, they are like any other valve set. Get your avo and check valve heaters first. Then check to see whether each valve is receiving volts.

Is the speaker and O/P transformer OK. Unlikely but possible.

Cheers,

Steve P.