[Amps] What's a better rheostat placement ?

[Tony King - W4ZT]

Primary is the only way to go :)
73, Tony W4ZT

w2cqm at juno.com wrote:
> 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