[sdiy] VCO Sync

[karl dalen]

The synthacon core are similar to SEM/ARP cores(not entirely but close)
tie the collector of a NPN to C2 cap (charge cap) create a 
narrow pulse circuit extractor, serial a cap 470p then diode,
anode to gnd catode to 470p cap serial a resistor from this 
junction to base on NPN, serial 10k resistor from base to gnd.

Reg
KD 

> ----- Original Message ----- 
> From: "David Ingebretsen" <dingebre at 3dphysics.net>
> To: "'synth-diy'" <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, March 31, 2010 10:13 PM
> Subject: [sdiy] VCO Sync
> 
> 
> >I want to add sync to a "vintage" VCO design (Steiner
> Synthacon VCO) since 
> >I
> > can't find the schematics to the Steiner Synthasystem,
> I'm stuck with the
> > Synthacon VCO which does not have sync.
> >
> > I see in the ElectroNotes index, there is an article
> about sync'ing a VCO,
> > but have not had a chance to look at it yet (I'm still
> at the office
> > pretending to work while my secretary is at lunch :)
> )
> >
> > Does anyone have other references or suggestions as to
> where I can go to
> > figure out how I can add a sync input (or as Nyle
> called it a phase reset)
> > to his VCO?
> >
> > David
> >
> > David M. Ingebretsen M.S., M.E.
> > Collision Forensics & Engineering, Inc.
> > 2469 East Fort Union Blvd. STE 114
> > Salt Lake City, UT 84121
> > www.CFandE.com
> >
> > 801 733-5458 Office
> > 801 842-5451 Cell
> >
> > dingebre at CFandE.com
> > dingebre at 3dphysics.net
> >
> >
> >
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at dropmix.xs4all.nl
> > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy 
> 
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