"Morse" wrote in message
...


Zeners aren't right either.


I didn't say they were, I mentioned them as a closer approximation
electrically than standard diodes.

Why not replace the diac?


Why not indeed? I certainly didn't imply any different course of action.

Morse



Thinking about it a bit more- the closest approximation I can come up with
would be four 30v zeners in a serial-parallel combo. Two zeners in series
with anodes together in parallel with two zeners in series with cathodes
together. This would drop 30.6 ish volts in either direction if I'm not
mistaken.

Still, a proper diac is the right way to go, messing with Frankenstein jobs
is pointless other than to satisfy one's curiousity ;-)

Morse