Note: Auction links are affiliate links for which the site may be compensated.
via
this auction
Two pics of the of the GR-500 inside below.
""Listed here is the flagship of the legendary pre-MIDI, all analog guitar synthesizer systems; The Roland GR-500 synth and GS-500 guitar.
This listing includes the Roland GS-500 guitar controller, The Roland GR-500 Synth module and a factory 24pin cable.
The GS-500 guitar is in Very Good condiction with all of it's original electronics, including the hexaphonic pickup, synth controls and 24pin connection to the GR-500 synth module. The gutiar hasn't been modified at all (as far as I can tell). The original pickups are intact as are the string isolators which are essential for the mulichannel infinate sustain system to fucntion. There are a few -very- small scrapes and dents as one might expect from a guitar from 1978... but overall it looks like this insturment wasn't used heavily and it looks great.
The GR-500 synth itself has recently been serviced (2023). It just got entirely re-capped (capacitors replaced)s, power supploy serviced, and several of the chips were changed from soldered to socketed.
Almost all of the features of the synth work well. The Guitar, PolyEnseamble and Bass sections work exactly as you'd expect them to. The PolyEnsemble and Bass sections are remarkably cool. Being able to play fully polyphonic chords on an anlog guitar synth is just a beautiful thing.
The Solo Melody section, however, is currently not functioning quite correctly. Right now the pitch of the Solo Melody section does not track the pitch of the guitar correctly, and the amplitude detection in this section doesn't seem to be tracking correclty either. I am not sure what the issue is, but two techs have suggested that this section may just need to be properly calibrated and the instructions for this procedure can be found in the service manual which is readily available. I regret not having the time in my life right now to address this issue as it may be quite minor, but I just can't say what this issue is for sure and I wanted to be totally up front that this issue exists.
So we have this remarkably, unique and rare set of GR-500 and GS-500 where the gutiar is in really nice shape, and the syth has recently been serviced and cleaned, but does have some issues with the Solo Melody section."
"This edition is rare, and cannot be found anywhere as a set. Made by EMS London, and works differently than the Synthi A, although it appears to be the same. Here is a breakdown of what you get below:
"Here we have a one of a kind custom PAiA built into an old suitcase built By Steve Alcorn the vice president of engineering at Linn, the synth is an expanded 2700. It inludes original 1/4" patch cables, suitcase has a key and there is another key to power the synth on. Comes with every pamphlet for each module used. Steve also signed the outside of the suitcase.
Pics of the inside below.
"ARP 2600 with 3620 Keyboard. Clean and in as close to mint condition as one could get. Includes covers. The AC inlet was modified to accept standard 3 prong removable cable. Repaired VCO2 and VCO2 Sub Board. Clean sliders, connectors and switches. Solder broken wire at reverb input tank which had fallen off. Calibrate and tune. Burn-in and functional test."
