synth guts

synth guts

Roland TR-77 voiceboard in 19" with midi trigger interface

Published on Aug 15, 2017

"More or less entertaining demo- and testsong with slideshow for a project in summer 2017: putting the voiceboard of a broken Roland TR-77 drumbox into a new 19" housing and supplying a midi trigger interface to overcome the boring preset rhythms. The board offers 13 pure analogue sounds, mainly generated with big coils in stunningly simple schematics:


I like wires
Published on Apr 2, 2017

"Ems Logik (Serial no. 008) triggered by external audio"

via this auction

"Offered is an Ems made Rehberg logic synthi, serial no. 008, from 1980 as well as the corresponding control keyboard DKE / A / L Serial no. 91.

The modular synthesizer in the case has only minimal usage traces and was checked in 2017

Oberheim Matrix 1000 w/ Faceplate Removed SN L930941

via this auction

Not the best pics, but interesting enough for a post.

Fixing Roland SH-2000, JP-4, Mars, SH-5 style Keyboard Contact Issues

New England Analog Archives
Published on Aug 3, 2017

"This video is an excerpt from a repair of a Roland SH-2000. The keyboard was having contact issues on many notes. The issue was that the 2 bus bars were very dirty. I cleaned them, and this solved the issue.
This portion of the repair took a little over two hours, due to the amount of disassembly and reassembly required. I had to cut

ROLAND JX-3P Tact Switches

via this auction

via the seller:

"bundle of 32 tact switches with caps for Roland JX 3P

all working

for sale here together with the full panel board as pictured.

All switches have been tested and work, you need to desolder them and install the switches on a JX 3P

The 2 sliders on the panel board work fine, 1 slider (left side) is missing.

volume knob works fine, pitch bender selector

Korg MS-20 Teardown: Pulse Width Modulation Install

Published on Jul 10, 2017 gstormelectro

"Audio and Video by G-Storm Electo c.2017

The vintage Korg MS-20 monophonic synthesizer comes with a pulse width knob, but no way to patch a modulation to it. In this video I teardown the MS-20, and install a Pulse Width Modulation routing.

My PWM will come from the MG/T.Ext circuit that is already present on the synth. 90% of the time I want to use

Synthchaser #074 - Yet Another LinnDrum Repair - Troubleshooting Dead Drum Sounds

Published on Jul 3, 2017 Synth Chaser

"In case you didn't get enough LinnDrum repair excitement last week in Synthchaser #072, I'm back at it again, firing up a customer's "Wildcard" LinnDrum, which was purchased in unknown condition and without a power supply. We troubleshoot and fix some dead and incorrect drum sounds and give yet another LinnDrum a chance at life.

Garry's Polymoog 280a Part1 (by Synthpro)

Published on May 2, 2017 synthpro

"Hey Guys, this is a video I made for Garry of his pre restored polymoog 280a that he purchased. He has not seen it in person yet so this is just a video going over some of the first power up."

Garry's Polymoog 280a Part2 (by Synthpro)

Published on Jun 29, 2017

Treat Yourself :)