[sdiy] I'm thinking about making some ARP's VCF modules replicas for sale. But..

[jpdesroc at oricom.ca]

The 4035 looks very similar to the 4012.. A Moog ladder ?

The most evident difference is the use of  3 x CA3086
instead of discrete transistors..

 

De : Michael E Caloroso <mec.forumreader at gmail.com> 
Envoyé : 15 mai 2026 10:48
À : jpdesroc at oricom.ca
Cc : synth-diy at synth-diy.org
Objet : Re: [sdiy] I'm thinking about making some ARP's VCF modules replicas for sale. But..

 

The 4035 is a good sounding ladder filter.  I have the 4034 in my ProSoloist, same circuit except for different input impedance to match the P/S.

 

https://vintagetechnologyarchive.com/synth/arp/4035-filter/

 

MC

 

On Fri, May 15, 2026 at 9:42 AM Jean-Pierre Desrochers via Synth-diy <synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org> > wrote:

Hi list,

 

I’m thinking about making some ARP’s VCF modules replicas for sale.

All the same components and PCB arrangements.

Completely the same as the originals..

But I’m wondering which one(s) would be the best candidate(s)

or should I say ‘looked for’. So far the 4012 (Moog lader pursuit)

seems to be a good one, and the 4075 (Odyssey, Avatar)

could also be good ones.

I know this is a question of taste but

let me hear what are your thoughts.

 





 

 

 

 





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