[sdiy] Midwest VCO Circuit - was more on VCO

[phillip m gallo]

Peter,

The first person i ever saw using a discrete overdrive diff amp for sine
shaping was Dennis Colin (of ARP/ARIES fame) back in the late '70's.  The
ARIES 317 VCO being a typical embodiment.


regards,
p


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Peter Grenader
Sent: Saturday, June 12, 2004 12:26 PM
To: synth-diy at dropmix.xs4all.nl; delta_316 at yahoo.co.uk
Subject: [sdiy] Midwest VCO Circuit - was more on VCO


Hey look at that...this is Henry's design.  Discrete comparotor.  A bit
tricker for adding the sync circuit, but I would think a summer into the
3080 with a buffered signal from the outside world would do it, right?

I also noticed that circuit uses Henry's famous sine shaper, which Nyle
Steiner also used in his VCO and makes for about the cleanest sines going.

And having a triangle at it's core and a reset signal, the addition of a saw
is easily had.

If any of you have ever seen Mark Verbos' adaptation of the Buchla 258,
you'll notice that he cookie cutted the Henry core in place of Don's
original for the purpose of eliminating unobtainium.

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