> how do you switch that SCR off?  Turns out, you switch
> a capacitor across the device which diverts the current
> around it for just a few micro(?)seconds and that's
> enough to turn it off.  Pretty impressive, I thought.

Barry, the two-thyristor scheme was used extensively for horizontal
deflection and HV circuits before HV transistors were available. Try to
get hold of a Grundig color TV set schematic from about 10-15 years ago.
Maybe Roman has one. It's a neat scheme. Of course the theory is discussed
in contemporary application notes (from ITT and others).

Peter

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