synth guts

synth guts

Mattel Optigan Model 35011 Repair by James Bennett

Published on Jun 28, 2017 James Bennett

"Something a bit different. In the vein of repair videos I like to watch, I was advised to actually document one about this project.

A friend's 1973 Optigan which amazingly he managed to find in England, and pretty locally at that. In our studio for a service.

I'm getting over a cold, so apologies for my heavy breathing!

More lighting required..."

Akai VX600 sounding better after the DAC adjustment

Published on Dec 22, 2017 Mindburner

"my VX600 was either failing auto calibration or was taking ages.
The solution is to check and adjust the DAC voltage to 2.5v
Makes a world of difference"


Published on Dec 16, 2017 100 Things I Do

"The final in the series on the Synclavier II. Thanks to a few requests this week we take a look inside the flight cased CPU,. I play a track on the Synclavier I'm working and show the restoration of keyboard's timber frame following the same hand rubbed method as originally done by New England Digital with the synth was new!

While the Synclavier will

Vintage Korg Polysix Analog Synthesizer SN 466466

via this auction

"This polysix is in good working shape. It was a victim of battery corrosion and had a clone KLM-367 installed with a new battery. It also had the keyboard scaler replaced. The voices are pretty in tune, there is room for improvement. Also, the filter cutoff isn't perfectly adjusted on all of the voices. I adjusted both by ear because I don't have an oscilloscope but it should

SOLTON PROJECT 100 - rare vintage polyphonic analog synthesizer plus sequencer

via this auction

You can find demo videos of this exact synth here.

"Very rare SOLTON PROJECT 100 - SSM IC's based midi polyphonic synthesizer with an unique Polyphonic sequencer!! It sounds AMAZING! Stereo Outputs with a WARM UNIQUE chorus effect! It will be included a MIDI editor for PC, very easy to program the Project 100!"

Pics of the inside, including the individual voice boards below.

Inside the Roland Boutique SE-02 analog synthesizer

Published on Dec 6, 2017 ranzee av

"Yep! I just voided my warranty! I take a look inside the Roland Boutique SE-02 analog synthesizer. This is the synthesizer that Roland have collaborated with Studio Electronics to make their first true analogue boutique (a move away from their usual VA/ACB style).

The video covers close-up footage of the circuit board and SMT components, including

Moog System 35A Modular Synth with 951 Keyboard Controller SN 7414

via this auction

"This is a rare opportunity to get a vIntage MOOG System 35A Modular Synthesizer with 951 Keyboard Controller.
Serial number is 7414. Assembled in Feb. 10, 1976 by R.A. MOOG CO.

System 35A was sold without the filter banks in those days, but they were added later.

Moog 35 had modules listed below:
902 VCA, 902 VCA, 902 VCA, 904a Low-pass Filter, 904b High-pass Filter, 907a


via this auction

"1970's Paia Gnome micro synth, not fully functional but it works, needs a little tune up, opened it up and found a broken component, should be an easy fix."

Pic of the inside directly below.

Paul McCartney demonstrates the Mellotron

Published on Aug 31, 2016 MotorMouthMusic

And a recent video from Bell Tone Synth Works

Inside a Mellotron M400: How the Mellotron Works

Published on Nov 27, 2017

"Here's a look inside a Mellotron M400 we just restored and an explanation of how it works! The famous (or notorious) Mellotron M400, made in the 1970s, is a unique keyboard instrument in which every key plays back a recording of

Vintage ARP Odyssey MKII 2813 w/ CUSTOM CLEAR BODY

via this auction

Check out the bottom of it.

"This was a strange storage unit auction find in the midwest. I don't know the story with the clear body, but I've never seen another one like it.

The roadcase it comes in is worn on the outside, but the foam inside is still good.

Here's what's been done to it:

~ All sliders were removed, cleaned, lubricated and reinstalled
~ All remaining

Treat Yourself :)