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[email protected] · August 21st 06, 09:42 PM posted to rec.radio.amateur.homebrew

wrote:
Thanks for the (mostly helpful) replies, guys.

Applying each one of the two ends of the 220V coil of the transformer
to the 220V legs of the amplifier plug made sense. I guess I was
mostly wrestling with how to handle the gounded / grounding lug of the
amplifier plug.

Gary said to just leave it floating, but wouldn't grounding it be safer?

Since you will be running the variac through a 110/220v isolation
transformer, you will lose reference to the utility ground, so there is
no reason to connect up the ground on the amp. If by some chance the
110v windings in the amp are on different cores, or are actually 2
transformers, then you would need a common (ground) reference for the
two. This is probably not your case, be nice if you had a schematic.

Gary N4AST