There should be more of these around. Maybe hiding in the basement of a high school or storage room of a University.

[Updated: November 25, 2022 We found a second 775a in Dave Brown's collection of impressive synthesizers. Dave did some repairs on his AMF 775a and even drew up a schematic for the computer. By the way, take a look at the rather magnificent modular synthesizer he built!! And while you are there, take look at his visit to Raymond Scott's Electronium.]

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