On Fri, Apr 20, 2007 at 07:43:39PM -0700, Jan Steinman wrote:
> > From: Tim Hughes <timhughes@xxxxxxxx>
> > Actually if you check schematics, the high voltage on the 2s, the
> > 4T etc goes through a small SCR
> > not an IC, so safe up to ~400V.
>
> How did you determine the forward breakdown voltage? Put it on a
> curve tracer? :-)
>
> Some SCRs are rated as little as 50V.
I replaced the dead SCR in my OM-40, it was a 400V sensitive-gate
device. I couldn't find one locally (Adelaide is a bit of an
electronics backwater) so a 200V one from a similar series went in :(
davidt
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