AW: AW: VCO-1C

[BJ]

Haible Juergen wrote:
> 
>         >Actually i dont find the MS20 noisy it is in fact rater silent,
>         >but on the other hand the Monopoly is wery noisy, i have owned
> both.
> 
> Was this an early MS-20 or a later model ?

Later one!

> I only played early ones (with Korg-35 ICs), and they were
> quite noisy (more than my Mono/Poly). I never played
> a later MS-20, but they have LM13600-based filters and
> a deemphasis (470us, 6dB) after the VCA (where is the
> preemphase counterpart ??), and they are said to be
> more quiet.

> 
>         >The one transistor VCA is  used in the JX3P and JX8P and they are
>         >not particular noisy i think!
> 
> Never seen these schemos. Are they anywhere on the web?

Well no, until now!!
I have scanned in the JX3 and 8P audio parts 
with my "wobbling" hand scanner at:
http://home8.swipnet.se/~w-88660/schpcb.htm

Have a look on the resonance feedback part of the JX3P!!

BJ