[EdHolland]

Thanks, Mr Fix,

I found the schematic, and noted the hot chassis configuration and the selenium rectifier. Didn't know about the possibility of different O/P tubes so that is very helpful to know.
You anticipated my next question which was regarding changes to the power switch wiring for improved safety - I'll look into these mods once things are working as originally designed. I may also pre-empt rectifier problems by substituting a modern diode + whatever series resistor may be required to ensure operating voltages are correct.

Cheers,

Ed