Jen SX1000 Analog Synth

via this auction

Sold For: £185.00
"The SX-1000 is a monophonic synthesizer with a 3-octave, 37-note, (C-C) keyboard and a black or white front panel (they came in two colors).
Also called the "Synthetone", the SX-1000 features a single oscillator, with a four octave range (32', 16', 8', 4') and three available waveforms, sawtooth, square, and PWM (Pulse Width Modulation).
White and pink noise are also available, as well as portamento/glide. The filter is 12dB/octave. There are two ADSR envelope generators and one LFO. The knobs on the SX-1000 are color coded, however the color inserts "tend to fall off", as this model has done.

Specifications
* Polyphony - Monophonic
* Oscillators - One DCO (sawtooth, square, pulse-width modulation); 4-octave range (32', 16', 8', 4'); white and pink noise generators
* LFO - 1 LFO; Vibrato
* Filter - 1 Low-pass filter, 12dB/octave, with ADSR
* VCA - 1 ADSR
* Keyboard - 37 keys
* Memory - None
* Control - None (Kenton Midi Retrofits available)
* Date Produced - 1978 - 1982"