Hello Rick,

> Put a bridge rectifer in series with the primary of the power transformer
as if
> it was a power switch. AC points of the bridge as the switch. A single SCR
> across the +- of the bridge will turn it on and off. Just make sure you
isolate
> the gate switching optically from the mains.

    this would waste power as heat on the bridge and I need this circuit to
be the most efficient possible.

    I know the most efficient way would be a mechanic relay, but I have some
design constraints that puts me on the need to use SCRs.

    Thank you very much,

    Brusque

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Edson Brusque                 C.I.Tronics Lighting Designers Ltda
Research and Development               Blumenau  -  SC  -  Brazil
Say NO to HTML mail                          www.citronics.com.br
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