<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Yes,<div class="">They are expensive.</div><div class=""><br class=""></div><div class="">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.</div><div class=""><br class=""></div><div class="">Terje Winther</div><div class="">WintherStormer</div><div class=""><br class=""></div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">15. mai 2026 kl. 17:55 skrev <<a href="mailto:jpdesroc@oricom.ca" class="">jpdesroc@oricom.ca</a>> <<a href="mailto:jpdesroc@oricom.ca" class="">jpdesroc@oricom.ca</a>>:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">Terje,<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">I knew Synthchaser had ARP VCF retrofits..<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">But selling ay $170USD.. Ooohh..<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">I’ll try to sell mine for a much lower on price..<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">And I chose to keep these things Through hole..<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">And thanks everyone for your comments.<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">I now have to think about my next move..<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></span></div><div class=""><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><b class=""><span lang="FR" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">De :</span></b><span lang="FR" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="Apple-converted-space"> </span>Terje Winther <<a href="mailto:terje.winther@wintherstormer.no" class="">terje.winther@wintherstormer.no</a>><span class="Apple-converted-space"> </span><br class=""><b class="">Envoyé :</b><span class="Apple-converted-space"> </span>15 mai 2026 11:50<br class=""><b class="">À :</b><span class="Apple-converted-space"> </span><a href="mailto:jpdesroc@oricom.ca" class="">jpdesroc@oricom.ca</a><br class=""><b class="">Cc :</b><span class="Apple-converted-space"> </span>synth-diy@synth-diy.org<br class=""><b class="">Objet :</b><span class="Apple-converted-space"> </span>Re: [sdiy] I'm thinking about making some ARP's VCF modules replicas for sale. But..<o:p class=""></o:p></span></div></div></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class="">Hi,<o:p class=""></o:p></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class="">There are already modern variants for sale, like this one:<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><a href="https://synthchaser.com/product/synthchaser-arp-4075-vcf-filter-submodule/" style="color: blue; text-decoration: underline;" class="">https://synthchaser.com/product/synthchaser-arp-4075-vcf-filter-submodule/</a><o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class="">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.<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><br class=""><br class=""><o:p class=""></o:p></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class="" type="cite"><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class="">15. mai 2026 kl. 15:29 skrev Jean-Pierre Desrochers via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" style="color: blue; text-decoration: underline;" class="">synth-diy@synth-diy.org</a>>:<o:p class=""></o:p></div></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">Hi list,</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class=""> </span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">I’m thinking about making some ARP’s VCF modules replicas for sale.</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">All the same components and PCB arrangements.</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">Completely the same as the originals..</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">But I’m wondering which one(s) would be the best candidate(s)</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">or should I say ‘looked for’. So far the 4012 (Moog lader pursuit)</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">seems to be a good one, and the 4075 (Odyssey, Avatar)</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">could also be good ones.</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">I know this is a question of taste but</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class="">let me hear what are your thoughts.</span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class=""> </span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class=""><image005.jpg></span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: Calibri, sans-serif;" class=""><image006.jpg><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: Calibri, sans-serif;" class=""> <o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: Calibri, sans-serif;" class=""> <o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: Calibri, sans-serif;" class=""> <o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: Calibri, sans-serif;" class=""> <o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: Calibri, sans-serif;" class=""><image007.jpg><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-CA" style="font-family: Calibri, sans-serif;" class=""><image008.jpg></span><span style="font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class="">________________________________________________________<br class="">This is the Synth-diy mailing list<br class="">Submit email to:<span class="apple-converted-space"> </span></span><a href="mailto:Synth-diy@synth-diy.org" style="color: blue; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class="">Synth-diy@synth-diy.org</span></a><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><br class="">View archive at:<span class="apple-converted-space"> </span></span><a href="https://synth-diy.org/pipermail/synth-diy/" style="color: blue; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class="">https://synth-diy.org/pipermail/synth-diy/</span></a><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><br class="">Check your settings at:<span class="apple-converted-space"> </span></span><a href="https://synth-diy.org/mailman/listinfo/synth-diy" style="color: blue; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class="">https://synth-diy.org/mailman/listinfo/synth-diy</span></a><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><br class="">Selling or trading? Use<span class="apple-converted-space"> </span></span><a href="mailto:marketplace@synth-diy.org" style="color: blue; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class="">marketplace@synth-diy.org</span></a><o:p class=""></o:p></div></div></blockquote></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class="">Terje Winther<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class="">WintherStormer<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><a href="mailto:terje.winther@wintherstormer.no" style="color: blue; text-decoration: underline;" class="">terje.winther@wintherstormer.no</a></span></div></div></div></div></div></div></div></blockquote></div><br class=""><div class="">
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