DIY dual filter for ARP synths

[Joachim Verghese]

Hi,

Last week I finished another DIY project: a dual filter module
for ARP synths. The module combines the 4023 (2-pole) and
4035 (4-pole Moog ladder) filters onto one board, and can
be installed into any ARP synth to replace either a 4075 or
4035 filter.

The design has been tested on an Axxe-2 and a Quadra, and is
soon to be tested on an Odyssey-2. It has worked well so far.

More information about this module can be found at my ARP web
site (which is very much under construction):

http://www.netcontrol.fi/~jocke/arptech/

The schematics are currently only in GIF format (average quality),
and the rest is Postscript. I hope to be able to convert the docs
into PDF format as soon as I get access to Adobe Acrobat.

If you have any questions, please do let me know.

-joachim