Cut Top Cabinet PreampCut Top Cabinet SpeakerRa-100 Top Cabinetry closeupRa-100 Top Cabinetry rebuildRa-100 Top Cabinetry closeupBottom portion: Conversion to 2×12 cab. I invested quite a bit of time in fixing it up to make all seams and joints smooth so I could apply new tolex and trim onto a nice surface. The thing was is bad shape to start with so might as well redo it all.Here’s some of the cabinetry cut up in half and the start of the complete dismantling. Cosmetically, I decided that to make this thing a little more practical, I would cut it in half, making it into a two piece amp with the 2×12 cabinet on the bottom and amplifier and rotary speaker assembly on top. That meant replacing all electrolytics and figuring out what’s broken with the electronics. I was very happy to find that little bit of information out.Cabinetry OverhaulI needed to completely overhaul the electronics. I did some research on the ‘net and found little info on these but did manage to find a schematic for it and to my surprise, found out that Gilmour used the 200w, 4×12 version of this very same amp. Big, bulky and heavy, but the poor little Honda managed to bring it back home. It was in the back of his pickup truck and we eased it into the little Honda Fit. It looked like it was kept in a barn for a couple of years. It seemed to be in rough shape but the price wasn’t too steep and it would make for a cool project. The person I bought it from couldn’t say whether it worked or not.
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I didn’t think much of it but I thought it was very interesting with its dual rotating speakers. A while back, I found this Yamaha RA-100 organ amplifier in the local ads.