MATRIXSYNTH: *SERVICED* 1985 Siel DK-80

Thursday, September 10, 2020

*SERVICED* 1985 Siel DK-80


via this auction

Demo video in the listing previously posted here.

"Selling this 12 voices, SSM2045 Italian synth from 1985!

The following points were just serviced on 10th September 2020:

- Keyboard contacts cleaned
- Divide-Down circuits rebuilt
- Power supply rebuilt
- Some chips were mounted on sockets for easy later repairs
- 6 VCA circuits serviced and many TL084 OP-Amp changed
- Buttons contacts cleaned

About the synth:
Sort of Italian Korg Poly-800, with great SSM 2045 filters (4 poles LP)
DCOs are M-112 B1, square wave generators that can be combined for a 'sawtooth-ish' waveform.
In square wave mode, the DCO can stack harmonies with variable levels, just like an organ. There's an additional pink noise generator.
The keyboard can be split in 6 voices / 6 voices, 1 D.C.O per voice.
There's also a simple BBD-chorus to change the tone color. (Same as Synthex)
The envelope generators are weirdo 6-stages ADBSSR.
There's 2 LFOs that go from 0.25 Hz to 10Hz.

40 Presets, 10 Users."

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