52CO46 that is the Stancor part # for the plate transformer for the BC-610E.
The voltage figures are for the DC output voltage under full load, using a
full wave ct rectifier circuit with choke input filter. The voltage
selection is accomplished by selecting the appropriate tap on the 110v
primary.
I use one of these transformers for the modulator plate supply in my HF-300
transmitter. I originally had a pre WWII UTC plate transformer, but the
insulation broke down and it bit the dust. The BC-610 unit made a nearly
exact replacement.
Don K4KYV
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