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

[Terje Winther]

Yes,
They are expensive.

I actually came across an original unused (yes, unused) original ARP 4075 filter submodules. It was faulty, but I found the fault: a production error (a short) on the PCB. Fairly easy corrected. So this submodules was probably selected out during the production phase. What to do with it? Well, inspired by the Tangerine Dream Project Electronics modular, I of course made a 5U modules with it, and it works like a charm. Veroboard for the external components, as described in the schematics, and drilled holes for the submodules. Scaffer front panel to suit. So the idea of having 5U and 3U modules that can easily fit submodules is a thought.

Terje Winther
WintherStormer



> 15. mai 2026 kl. 17:55 skrev <jpdesroc at oricom.ca> <jpdesroc at oricom.ca>:
> 
> Terje,
> I knew Synthchaser had ARP VCF retrofits..
> But selling ay $170USD.. Ooohh..
> I’ll try to sell mine for a much lower on price..
> And I chose to keep these things Through hole..
>  
> And thanks everyone for your comments.
> I now have to think about my next move..
>  
> De : Terje Winther <terje.winther at wintherstormer.no> 
> Envoyé : 15 mai 2026 11:50
> 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..
>  
> Hi,
> There are already modern variants for sale, like this one:
> https://synthchaser.com/product/synthchaser-arp-4075-vcf-filter-submodule/ <https://synthchaser.com/product/synthchaser-arp-4075-vcf-filter-submodule/>
>  
> I remember that the site ARPtech back in the day offered a dual filter package with a switch. It was called the "40235 Dual Filter». Sort of similar to what Korg-ARP is doing these days.
>  
>  
> 
> 
>> 15. mai 2026 kl. 15:29 skrev Jean-Pierre Desrochers via Synth-diy <synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org>>:
>>  
>> 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.
>>  
>> <image005.jpg>
>> <image006.jpg>
>>  
>>  
>>  
>>  
>> <image007.jpg>
>> <image008.jpg>
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>  
> Terje Winther
> WintherStormer
> terje.winther at wintherstormer.no <mailto:terje.winther at wintherstormer.no>
Terje Winther
WintherStormer
terje.winther at wintherstormer.no




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