Elektor Formant Analog Synthesizer with Keyboard

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via this auction

"This is an Elektor Formant synthesizer with keyboard, 5 octaves.
The device has a very clean and consists of the following modules:
- 2x ADSR
- 1x LFO
- 1x NOISE
- 1x Dual VCA
- 1x COM
- 2x VCO
- 1x VCF
- 1x VCF 24dB
- 1x RFM
- 1 x Keyboard with INTERFACE, 5 octaves

In addition, a front panel with switches and potentiometers fitted for a third VCO module, cable keyboard / synth, 3 patch cable 3.5 mm jack, and 6 pieces 3.5 mm metal plug.

The keyboard is very good, the unit is working as far as I can see that, except for the following defects:
- Some Poties scratch easily, can be solved safely
- 24dB at VCF module Q knob (slope) is not operational. The module filters otherwise, the signal comes through normal (normal VCF module works perfectly)
- RFM module with no obvious function for me (maybe not I get it too ...)

For a hobbyist, it is certainly not difficult, they back up and running modules, unfortunately I can not have time to deal with it.

Shipping in Germany 25 euros, which will be 2 heavy packages on I would prefer a pickup, I'll also receive up to 50 km."