[sdiy] 3340 FET sync

Oakley Sound oakleysound at btinternet.com
Tue Jan 21 09:59:09 CET 2020

I'm probably completely on the wrong track; but the 3340 is a triangle 
core oscillator - there's a triangle waveform on that capacitor. If you 
short it at certain points on the waveform maybe something weird happens 
like an overshoot. Normally when you do sync on a triangle core 
oscillator you have to force the comparator too.

So take a look on the triangle output and see what's actually doing 
before the waveform goes to the tri to saw convertor.



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