Due to a high 250VAC primary voltage, the dedicated filament voltage
transformer (15VCT @ 22 amps) for a series wired retrofitted pair of
3cx1200A7's in a Henry 3KA is about 1 volt too high. The 220VAC Variac
I have is a bit too cumbersome to locate into the lower section of the
amp. A small footprint rheostat (22 ohms @ 50W) appears to be the way
to go. Is it preferrable to wire it into one leg of the 220VAC primary
or to wire it into the low voltage output side of the transformer? Any
comments would certainly save me a great deal of trial and error. Thanks,
Ron W2CQM/3
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