“For sale is a mostly homemade modular synthesizer in the Synthesizers.com format, consisting of the following modules in a 22-unit cabinet:
1 – Synthesizers.com Q104 MIDI Interface
2 – Yusynth VCO (matched BC547 version)
3 – Synthesizers.com Q106 Oscillator
4 – Yusynth Sample & Hold / Noise Source
5 – Yusynth ADSR (new version)
6 – Yusynth ADSR (new version)
7 – Yusynth Dual Gated Slew
8 – Yusynth Clock Divider
9 – Multiples (three groups of four, with a switch to join two groups)
10 – Yusynth VC-LFO 2
11 – Yusynth Ring Modulator (old version with no surface-mount parts)
12 – Yusynth Minimoog Filter
13 – Synthesizers.com Q107 State Variable Filter
14 – Yusynth Haible Wavefolder
15 – Yusynth VCA (DC version)
16 – Yusynth VCA (DC version)
17 – Yusynth AC-DC Mixer
Also included: an IEC power cord, a MIDI cable, 13 assorted patch cords, one blank 1-unit panel (mounted on back), original paper documentation for the “DotCom” modules, and my original plans.
I planned this instrument in late 2012 when I was in high school, choosing the modules mainly for playing melodies and bass-lines similar to what I heard in 1970s prog-rock and C64 chiptunes. Construction finished in late 2013 except the LFO module, which was built in mid-2016. This was my first major electronic build, during which I learned how to etch, drill, and design circuit boards, and to apply lettering to panels. I hadn’t yet learned to design my own circuits, so all designs are from Yusynth except the power supply, which is from Ken Stone (with my own circuit board design). Here are some facts about the sections that I built:
– All modules started as blank Synthesizers.com panels except the power module on the back, which was made from sheet aluminum.
– Lettering was applied using the “DecalProFX” method, which involves printing a toner image, coating it with colored foil (in this case, white), and then transferring it to the panel. Small defects were corrected with a Sharpie paint pen. All lettering has been sealed over with matte clear-coat.
– Circuit boards are all single-sided and through-hole, etched using the toner transfer method, and tinned with MG Liquid Tin.
– All chips are socketed for easy replacement, though none have needed it so far.
– Cabinet was made from particleboard shelves with vinyl woodgrain. Its corners use metal bracket joints, and the modules mount to hardwood strips with decorative black wood screws. I can provide additional screws if desired. On the bottom are 8 adhesive feet.
The workmanship is quite good, if I may say so, but it shows some evidence of being mostly homemade – see pictures. It has been kept very clean in my basement studio for its whole existence (and I just cleaned the jacks after noticing they are a bit dusty in the photos), so it still looks and functions like new. I calibrated it for the second time ever in March 2025; I had not felt the need to make any adjustments between when it was built and now.” Click here to visit listing on eBay
