Sequential Circuits Pro-One Analog Synthesizer SN 9270

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"Everything seems to work well: I checked out the all of the potentiometers and the switches and all are functional. Only the Noise/Ext pot in the mixer is a bit scratchy near the lower end – very likely some cleaning spray would help that. I also checked out all the external connections and they both send and receive CV/trig as they should; the Filter In and Audio In both work appropriately.

The cosmetics overall are good (see the pics). There are two basic cosmetic flaws:

There is a drilled hole in the upper right panel, where someone might have had a switch or wanted to put an 'ON' indicator LED? I don't know, I received it this way. You could install a switch there (it would be a good place for a 'Invert Filter Envelope' toggle switch), or you could use a hole plug, or just some electrician's tape to cover it up.

The pitch wheel has an internal crack. However, this seems purely cosmetic: the wheel itself is in solid shape.

Now, on the chassis is a high serial number (9270), which would usually indicate that this has one of the dreaded 'membrane' keyboards. However, this keyboard does NOT have the membrane keyboard, it has the superior J-wire design. I know because I installed the J-wire keyboard here. It was from my other Pro One with an earlier serial number (I put that Pro One into a Synthwood case and used instead the keys from a dead Juno-106). To reiterate, the synthesizer in this auction has the J-wire keyboard, (see the pics) and I just replaced the bushings and cleaned up the wires and buss bar, so it's working nicely.

I also recapped the unit, removing all old electrolytics and tantalum caps, and replacing with new electrolytics.

Everything is working, but due to this being vintage analog electronics, all sales are final. I do guarantee that it won't arrive DOA."