[sdiy] Saw core JFET mystery

[David G. Dixon]

Thanks, Aaron!

> >> Yep, that looks pretty much like mine, albeit with different component
> >> values...
> >
> > except for that transistor on the end of the comparator.  What's up with
> > that, Magnus?
> 
> Danger Will Robinson!
> 
> I had a student build this a couple of years ago:
> 
> http://home.swipnet.se/cfmd/synths/friends/stopp/asm1vco-1.1.pdf
> 
> and it turned into an absolute nightmare because of the confusion that
> transistor caused. It worked muh better once we knew to not include an
> actual transistor there.
> 
> That transistor is *part of the LM311* - it's trying to illustrate the
> open collector output of the 311.
> 
> Repeat, repeat, *don't* put a transistor in that spot - just hook the
> output of the 311 to the node connected to the collector of the phantom
> transistor.
> 
> - Aaron
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