[mikethedruid]

Before you do much else, perhaps you should sit down and trace the wiring of this receiver and make yourself a schematic. These old TRF sets are usually pretty simple to trace, and it will give you a better idea of the battery connections. The old standard C battery was 4 1/2 volts, usually provided by 3 D cells in series. Standard B batteries came in 22 1/2 volt increments, 22 1/2, 45, 67 1/2, 90, and sometimes 135 volts. the guts of the 22 1/2 volt battery was made from 15 cells, each 1 1/2 volts, in series. Usually all the B batteries use a common ground, and one can series them, tapping off the voltages as needed. Hope this helps. I am attaching a schematic for a typical TRF set from your period. Using your set, you should be able to find the similarities and differences quickly. The battery hook up will probably be very similar to this, although the color code of the wires will probably be different.


[Image: https://40.media.tumblr.com/9a5a7c0c2b6e...1_1280.jpg]