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[OM] Re: Q for Dr. Flash et al

Subject: [OM] Re: Q for Dr. Flash et al
From: David Thatcher <davidt@xxxxxxxxxxxxxxxxxxx>
Date: Sat, 21 Apr 2007 13:18:36 +0930
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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