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22nd February 2012, 10:13 PM

#21

Wavebourn

diyAudio Member

Join Date: Sep 2006

Location: Pleasant Hill, CA

Quote:

Originally Posted by Rundmaus

Do spark gaps of appropriate trigger voltage do the job equally well? I would also like to protect my OPTs, but if possible without giving up the 'no semis' design idea...

"Semis" work only and only when the amp starts clipping while output is disconnected, otherwise they are out of signal path. However, you need quite powerful and fast high voltage diodes. I used diodes that I salvaged from TV sets.

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