ARP 2600 Synthesizer w/ 3620 Keyboard - New VCF, Ring Modulator and 1 new VCO

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"ARP 2600 synthesizer, including the 3620 Keyboard. The 3620 is the preferred keyboard for the 2600, as it includes an LFO, Vibrato, Portamento, second CV output for 2-voice operation and jacks for footswitches.

This ARP has had some recent repairs. VCO-1, the VCF and the Ring Modulator are all brand new, and made by CMS.

As a 41-year-old instrument, it of course has some issues. The keyboard, although fully-functions, could benefit from calibration. Also, VCO-1 works 100% when patched, but the normal is disconnected. As you can see in the photos, the sliders in the voltage processor section are missing their tabs, although they are 100% functional. Finally, the lid for the keyboard is included, but the lid for the console is missing...

FUNCTIONS:
3 Voltage Controlled Oscillators 03 Hz to 20 KHz in two ranges
Five waveforms include: variable-width pulse. triangle. sine, square, and sawtooth
1 Voltage Controlled Lowpass filter Variable resonance, DC coupled. Doubles as a low distortion sine oscillator.
1 Voltage Controlled Amplifier Exponential and linear control response characteristics
1 Ring Modulator. AC or DC coupled
2 Envelope Generators
1 Envelope Follower
1 Random Noise Generator
1 Sample & Hold with internal clock
1 General purpose Mixer and Panpot
1 Voltage Processor with variable lag
2 Voltage Processors with inverters
1 Reverberation unit
Twin uncorrelated stereo outputs
2 Built-in monitoring amplifiers and speakers, with standard stereo 8-ohm headphone jack
1 Microphone Preamp with adjustable gain
1 Four-octave keyboard with variable tuning, variable portamento, variable tone interval, and precision memory circuit

DIMENSIONS: Console 32" x 18" x 9x Keyboard 35" x 10" x 6" "