>"Neutral to chassis ground and ground, ground, ground everything together, and
>to the 240 ground coming into the power supply."
That's what ETO did in the Alpha 70/77 series amps. It's not strictly a NEC
violation because NEC is a premise wiring and safety standard, and not a
product wiring standard.
>Use the common connection point between two 120 volt windings, wired in
>series, on the input of the HV transformer for 240 use.
Yes, another common scheme.
>"I guess I'm leaning toward a 240/120 step down transformer."
It's a lot of extra work, but I chose to run 4-wire #10 with a dedicated
neutral to the shack. Modification to the Alpha amps is very easy and only
requires a slight wiring change on the amp's Cinch-Jones power plug to break
the neutral-chassis bond.
Paul, W9AC
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