|[AMRadio] Transformers Revised|
rickbras at airmail.net
Sun Feb 18 21:45:23 EST 2007
I just made a discovery. The BT-20-A broadcast transmitter uses several
filament transformers for the various stages. All of them are rated at
100 volts AC primary. All of the primaries pass through a voltage
adjusting rheostat and volt meter to insure proper filament voltage on
all tubes. So, my earlier request for a 115 vac primary filament
transformer was wrong. It needs to have a 100 vac primary. I'm sure GE
did this to insure there was plenty of room, high or low, for various
line voltages encountered. However, it's created a problem since I
haven't seen a lot of 100 vac primary transformers floating around.
This may be a perfect candidate for rewind. Any help or advice will be
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