So I've been slowly fixing up this MS20. It needed to be cleaned and 3 pots needed to be replaced. But I'm battling one of its original issues, which is pitch/waveform unstableness in VCO 1. If you listen carefully in the video below, you can hear issues in the first octave. Most notable is G-C, whi...

decided to throw the old optocoupler back in to see if that would work - and it did (although the pitch drifts like crazy). So, I've got a new VTL5C9 coming and I'll install it with more care this time around to avoid shorting again!

update: spent a couple mornings working the tuning procedure from scratch using just the service manual instructions - finally got somewhere this morning with it. However In putting it all back together this morning, I somehow shorted something and the beast is down again. Just low freq blips coming...

Alright. I fixed the 'output' issue - after taking apart the key bed and cleaning the contacts, it now generates sound on every key. All the voice diodes light up appropriately. However, tuning has been a nightmare. Right out the gate, voice 5 was out of tune with the rest of the voices by a whole t...

Who doesn't love spending money on a mystery?? BACKSTORY Took a gamble and bought this Polysix on eBay, listed as non-functioning. The description was as follows: "Removed old battery, repaired corroded PC Board traces. Installed new battery holder, NMH batteries. Tried loading programs, LEDS act no...

Thank you! Believe it or not - this stuff is 100% in the box. Arturia V4 collection synths, Gforce Mtron and Oddity 2 and Goldbaby drum machine samples.

I mean, someone must have dug it!

$3499 from Sweetwater

Interesting - my impression of the vintage arp oddy market has been the opposite - I've been seeing them go for under $1500 lately, whereas for a long time you were lucky to see anything under $2000! Its actually kind of surprising, as the Karp Oddy, although largely a successful release, has too ma...

I've got the older osc board as well, and it has the same effect! What did you clean those board edge contacts with? The power supply board still has big old looking purple caps. Its been a while since I've replaced components on a board, so I'll have to get back in the groove again before fooling w...

Thats a good idea. I think I'm going to go through and clean up everything at this point. The seller had said it was 'recently serviced' but hasnt given me any details. So who knows. The keybed needs some love (bushings/leveling) anyways. It is nice however, to be back in vintage land. THAT sound! W...

Its also interesting to note that it was fine for a few days, and then I picked up and moved the Mini elsewhere in the room and the issue started. Unfortunately, moving it back didn't resolve the problem, however ;). So far everything I've look at inside doesn't giveaway any clues - no loose connect...

Currently, she's sustaining notes indefinitely in a couple of different circumstances. Circumstance #1: With the decay switch OFF, if the decay knob is set to zero, the last note pressed on keyboard will sustain indefinitely. When I advance the decay knob to a longer time, the sustain will decrease ...

great stuff - seemed inevitable they would collaborate!

great stuff, man!