osc sync

[Harry Bissell]

Don't know if you have the same schematic as me...but it looks like you want to
pull the cap (C33) to +12 volts, either by forcing a reset, or using a fet.
Maybe JH or Tony (who makes the 303 clone) could add more info.  Q25,26 and 27
make the reset circuit, they form sort of a triac crowbar... once triggered they
conduct until current flow stops. You might fool around in that area. I'd try
the fet myself...
H^)   harry

Rob wrote:

> Well, I am proud to announce that I figured out a way to sync two tb303 type
> oscillators, but its just soft sync where they will sync up if they are a
> harmonic of one another. Im going to try to add hard sync, but it looks like
> Im going to have to somehow discharge the trig-saw converter cap to force it
> to drop to zero.
> Now, my next question is, is this correct?? Is it even possible to
> "hard-sync" this type of trigger to saw converter oscillator?
> I know I can reset the saw converter output to zero, but I can see problems
> because of the 5 volt reference involved. I can't just short the across the
> cap input to ground because it will whack the oscillator out of tune and it
> won't recover quickly enough.
>
> Maybe short the cap to some nominal resistance to ground? Im kind of stumped
> on this one.
>
> Rob