[Bob Carriere]

..in thinking that the receiver works on 250 volts DC.......??

Hi Bob

In the old days we use to have huge heavy AC voltage regulators..... adjustable from 110 to 130 ...... so if one dialed 125 V steady and flowed it into a 2 to 1 step up tranformer you would have almost steady 250 AC volts output...(your amps reduced in half )... then you would need to convert to 250 DC.......

Another questions for the "Esspurts" ....... what voltage do the tube (valve)filaments run on the 19 sets....... 12 volts DC or the same source of 250 volts DC.?

It's been a long time since technical school....?

I still have a rotary transformer from a 19 set that my DAD used for burning is VAC initials on all his tools.

Bob