Synton VCF 3017 Synthesizer Filter Module

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via this auction

"Up for sale is a very rare Synton Voltage Controlled Filter (VCF) module, model 3017, made in Holland. This was intended to fit into their large modular synthesizer systems from that era.

I purchased this synthesizer filter module in the mid 1980s from an authorized Synton dealer, and never got around to using it. It's UNTESTED but it's as new as when I bought it. It's in excellent condition although there is one very small paint imperfection from the factory on the front panel, between the input jack and the band pass output jack. It requires a +/- 15 volt DC power supply (which I've never had access to, and that's why I never powered it up).

It has one audio input, a voltage control input, a Band Pass output (BP), and an output for Low Pass / N / High Pass. The controls are one knob for Input Attenuation, one for Frequency, one for Resonance, and a knob to change between Low Pass, Notch, and High Pass filtering. And there's a red LED to indicate Overload.

This synth module uses standard banana jacks, so it can connect to other devices using the same type of jack, or can be used with third-party adapter cables or modules (verify with your technician).

Dimensions (approx):

128 mm tall (5 1/6th inches)
80 mm wide (3 3/16th inches)
50 mm deep (2 1/8th inches) (total including knobs)
34 mm deep (1 3/8th inches) (from panel to farthest PCB component)

The power wires extend approximately 18" from the printed circuit board. See photos to view power connector.

Could this be the retro module you're looking for to fit into your system? Maybe so!

It requires +/- 15 volts DC, so please verify that this will work with your system before bidding. (Euro-rack systems run on +/- 12 volts DC, so if you want to use this with a Euro-rack system, you'll need a separate power supply.)"