[sdiy] Aries modulars

[jeff brown]

I built one of these back in the late 70's - never got it to work. The tech
I talked to at Aries at the time determined that the potted expo converter
(U8) was bad and sent me a new one. That wasn't the problem.

Anyway, out of curiosity I disected the old potted module. The little schemo
I made of it was lost a long time ago, but as I recall, it contained 2
transistors and a resistor (probably a tempco).

I still have the VCO - if I ever get really bored I'll try again to get it
to work. Or disect the other U8 (heh heh).

- Jeff Brown

----- Original Message ----- 
From: "JH." <jhaible at debitel.net>
To: "Don Tillman" <don at till.com>; <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, June 13, 2004 7:18 AM
Subject: Re: [sdiy] Aries modulars


> Hi Don,
>
> nice to see these documents online now!
> I'll download them and see if there's something I don't already
> have, when I'm at a computer with higher bandwidth again.
>
> Meanwhile, I checked the VCO page
> http://www.leinermedia.com/Aries/AriesSchematics/AR-317s.gif
> It's apparently the same drawing as I have, complete with the
> expo converter shown as "U8".
> Does any of the other documents shed some light on what U8 exactly is?
>
> JH.
>
> ----- Original Message ----- 
> From: "Don Tillman" <don at till.com>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Sunday, June 13, 2004 12:30 PM
> Subject: [sdiy] Aries modulars
>
>
> > Hey folks,
> >
> > I had vaguely heard of Aries modulars in the past, but today I
> > happened to run into this web site that documents them pretty well.
> > Check it out:
> >
> >   http://www.leinermedia.com/Aries/AriesHome.html
> >
> > Here are the interesting things I learned:
> >
> >   1. Dennis Colin, known for much of the design work on the ARP 2500
> >      and ARP 2600, was apparently the main designer of the Aries
> >      modules.
> >
> >   2. The modules are very ARP-like in design, philosophy, voltage
> >      levels, circuit details, etc.  'Not surprising.
> >
> >   3. Their VCO is a triangle core, with a parallel sawtooth
> >      integrator, thus eliminating any possible glitch in the
> >      triangle-to-sawtooth converter at the expense of possible
> >      sawtooth level inaccuracies.  This relates to the recent
> >      discussion here.
> >
> >   4. They have a voltage controlled phase shifter that appears to be
> >      the same as the one on the ARP Quadra, but without the noise
> >      reduction circuitry.  And it seems to be 10 stages instead of
> >      14.
> >
> > Very cool stuff.
> >
> >   -- Don
> >
> > -- 
> > Don Tillman
> > Palo Alto, California
> > don at till.com
> > http://www.till.com
> >
> >
>