[sdiy] SSM2164 to use as ring modulator...

[Neil Johnson]

As others have pointed out:

> Whoa! This is a part that is no longer being made. Why would you design
> something new to use parts that might be the only way to repair some vintage
> analog synth? I know that Analog Devices continued to make the SSM2164 after
> SSM, for a while, but I see that their web site currently marks this part as
> discontinued/obsolete (last time to buy: Dec 2012, last ship date: Dec
> 2013).

CoolAudio now make them:

http://www.coolaudio.com/products.html

And available from:

http://www.mammothelectronics.com/Coolaudio-V2164D-Quad-Voltage-Controlled-Amplifier-p/400-1034.htm
http://synthcube.com/cart/index.php?route=product/product&product_id=276
http://www.magsmoke.com/pricelist.asp
http://www.smallbearelec.com/servlet/Detail?no=737
http://synthengineering.co.uk/products/coolaudio-v2164d-quad-vca

Just be aware of this:
http://www.milton.arachsys.com/nj71/index.php?menu=2&submenu=2&subsubmenu=3

Oh, and as for a ring modulator, use two gain cells to make a Irwin
linearised VCA and then with a couple of opamps you can make your ring
modulator.  So a single 2164 can make two ring modulators.

Cheers,
Neil
--
http://www.njohnson.co.uk