Odp: [sdiy] 80017A VCF/VCA chip

[Roman Sowa]

Thanks for all replies, on and off list.
It's helps a lot.

Well, the inards are made from off the shelf parts, right...
Judging from the pinout, IR3109 can be easily substituted
by expo converter and SSM2044 ;-)
Time for a big discrete project for me I guess.

Anyway, thanks again.
With a little help from my friends I could be tempted to make
nice little board of same size and functionality someday.

Roman

----- Original Message ----- 
From: Tom Arnold <xyzzy at sysabend.org>
To: andy <mcphive at corrupt.net>
Cc: Roman Sowa <modular at go2.pl>; <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, May 25, 2003 9:51 PM
Subject: Re: [sdiy] 80017A VCF/VCA chip


> On Sun, May 25, 2003 at 09:44:50AM -0400, andy wrote:
> > 
> > Hi roman,
> > 
> > here's the pinout I have for the 80017A/800170 chips:
> > 
> > pin 1 is the one all off by itself, the rest follow sequentially:
> > 
> > 1. VCF IN (audio)
> > 2. RESO CONTROL
> > 3. VCF OUT (audio)
> > 4. +15v
> > 5. -15v
> > 6. VCF CONTROL
> > 7. GND 1 (this is the VCF gnd)
> > 8. GND 2 (this is the VCA gnd)
> > 9. VCA IN (audio)
> > 10. VCA OUT (audio)
> > 11. VCA CONTROL
> > 
> > 
> > Inside the epoxied package is an IR3109 chip and two BA662 chips.
> > The first 662 is hooked to the "RESO CONTROL" input, and controls the
> > feedback loop around the IR3109. The second 662 is not linked to the VCF
> > at all, and is used as a VCA.
> > 
> > andy
> 
> And if it helps, here's a pinout of the IR3109 :
> http://www.synth.clara.net/images/IR3109VCF.gif
> 
> -- 
>  ------------------------------------------------------------------------
>  - Tom Arnold -       When I was small, I was in love,                  - 
>  - Sysabend   -       In love with everything.                          -
>  - CareTaker  -       And now there's only you...                       - 
>  --------------         -- Thomas Dolby, "Cloudburst At Shingle Street" -
>