ilovefuzz.com

How difficult would this be? I'd like to make my Frequency Analyzer CV compatible and use it with my old analog synth. Is it even worth it? Would anyone around here like to take a shot at it?

not that hard

the modulation frequency is generated from an ICL8038 chip.

http://www.intersil.com/data/fn/fn2864.pdf

look at figure 10 in the above doc.

heres the frequency analyzer schem

http://www.freeinfosociety.com/media.php?id=4105

basically you need to add something like the opamp circuit feeding pin 8.

Thanks for the info, man!

Now to find somebody that's capable of making sense of all that!

do you live in montreal or toronto? if you are in montreal i can do it no problem. or if you want to ship it to me i can do it that way too.

if multi doesnt do it, you can just stop by the modular synth forums at muffwiggler.com or electro-music.com

multi_s wrote:do you live in montreal or toronto? if you are in montreal i can do it no problem. or if you want to ship it to me i can do it that way too.

Both! Resident of Quebec but working in Toronto. I'll be coming back to the city for a week or so after a gig here on the 13th. I'll send you a PM.

How old is the Frequency Anaylzer? They don't use that chip anymore and the schematic is a bit different.
It's an AD633 now.

It's the bigbox version, though I'm ot sure from which decade. How can I find out? Open it up, I guess...?

EDIT: found the info here http://www.analogman.com/faq.htm

Scruffie wrote:How old is the Frequency Anaylzer? They don't use that chip anymore and the schematic is a bit different.
It's an AD633 now.

the ICL 8083 is not the balanced modular, but the function generator. AD633 replaced the old analog multiplier IC, I am pretty sure they still use ICL 8083 for the function gen. If not its no big deal. If the generator is voltage controlled its more straightforward. Otherwise, current controlled as the 8083, use an opamp to make a voltage controlled current source and voila same difference.

multi_s wrote:

Scruffie wrote:How old is the Frequency Anaylzer? They don't use that chip anymore and the schematic is a bit different.
It's an AD633 now.

the ICL 8083 is not the balanced modular, but the function generator. AD633 replaced the old analog multiplier IC, I am pretty sure they still use ICL 8083 for the function gen. If not its no big deal. If the generator is voltage controlled its more straightforward. Otherwise, current controlled as the 8083, use an opamp to make a voltage controlled current source and voila same difference.

Teach me for not looking at the schematic and just assuming you were talking about the multiplier, yes it still uses the 8083.