How much current are you trying to switch? The circuit I described can easily
handle 500 watt FM transmitters and high power Motorola two way radio repeaters
(which is where I got the circuit). The bridge never gets warm.
Rick

"Edson Brusque (Listas)" wrote:

> 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
>
> -----------------------------------------------------------------
> Edson Brusque                 C.I.Tronics Lighting Designers Ltda
> Research and Development               Blumenau  -  SC  -  Brazil
> Say NO to HTML mail                          www.citronics.com.br
> -----------------------------------------------------------------
>
> --
> http://www.piclist.com#nomail Going offline? Don't AutoReply us!
> email listserv@mitvma.mit.edu with SET PICList DIGEST in the body

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body