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via this seller: "Here is a lovely vintage OCTAVE CAT model 1853 analog synthesizer. Unit works fully 100 percent and is in great cosmetic shape. I recently paid 150 dollars to have the unit fully checked out, serviced, cleaned, and re-calibrated by Deltronics here in Chicago. The thing purrs when powered on. All switches, sliders, and knobs work as should, and no issues with rear jacks. I also recently spent about 50 dollars upgrading the knobs to Moog Prodigy style knobs, which in my opinion it looks much better than the original knobs. I also purchased the full schematic for the model 1853 (not easy to find) in a PDF format that I will include for the auction winner. I upgraded the rubber feet and built a new, more sturdy back cover."
"The unit was created in the early 80's and can be considered a defining product of the times; it has preset rhythms like earlier drum machines but the sound is much more modern and reminiscent of machines like the TR-808. The patterns are very useful and varied and the ability to add-in lines of percussion with the push of a button is very handy for quick composing sessions. The drum machine has a trigger out for driving sequencers, arpeggiators and any other CV/GATE utilities you can think of. This unit also includes the original dust cover."
via this seller: "Here is a lovely vintage OCTAVE CAT model 1853 analog synthesizer. Unit works fully 100 percent and is in great cosmetic shape. I recently paid 150 dollars to have the unit fully checked out, serviced, cleaned, and re-calibrated by Deltronics here in Chicago. The thing purrs when powered on. All switches, sliders, and knobs work as should, and no issues with rear jacks. I also recently spent about 50 dollars upgrading the knobs to Moog Prodigy style knobs, which in my opinion it looks much better than the original knobs. I also purchased the full schematic for the model 1853 (not easy to find) in a PDF format that I will include for the auction winner. I upgraded the rubber feet and built a new, more sturdy back cover."
