Sequential Circuits Prophet 5 Rev. 3.3

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"Up for bid is this classic Prophet 5 and case. By far the most stable and dependable of all the Prophet 5 revisions, the Rev. 3.3 came loaded with 120 factory programs, all of which can be edited and saved by the user. These units can also be upgraded to MIDI compatibility, though this one has not been upgraded. I bought the instrument and the case new in ’82 or ’83 but haven’t been able to use it for the past 12 years or so. I hate to see it go, but at this point I think it’s best to pass it on to someone who will put it to its intended use.

Electronics: It just got a complete overhaul. I shipped it off to the highly-regarded Prophet guru at Analog Synth Service in Oakland, CA (not Wine Country). He brought it all back up to factory specs, including the replacement of a control VCA (CA3280) and a voltage controlled filter (CEM3320). He also scaled the DAC, the oscillators, the filters, and reloaded the original 120 factory programs into the main and expansion RAM.

The unit also got all new electrolytic and tantalum capacitors (including the filter caps on the power supply), a new 3-volt memory battery, one new potentiometer, and all the pots and switches were cleaned. The key bed itself was completely disassembled and cleaned, new key bushings were installed, and the metal comb prongs that the keys mount to were leveled. All the key contacts were cleaned and adjusted as well, so there is no misfiring or 'spitting' at all."