Incredably neavy lump. Unused for years and unknown history and mains lead
is mildewed so
I wanted to insppect innards first and then power up on a variac.
Eventually twigged how to remove the top cover. Innards perfectly clean and
healthy looking.
But now stumped - where on earth is the on/off switch ?

electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse