Daymn that amp was filthy. I know it looked clean inside but inside the jacks were disgusting. But now all the knobs, jacks and switches are dead silent
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Inside a Roland JC 120
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Originally posted by beaubrummels View Post
I think it has more to do with how they design and test. They targeted Jazz initially, so they tested with jazz boxes, which are quite dark, often using neck pickups solely. When it became clear other players were using the amp, they adjusted and began testing with a wider variety of guitars and situations. (I have a friend that has worked at the Roland headquarters in Hamamatsu and I've toured their facility, studio and test labs.)
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Originally posted by ArtieToo View PostThat would've been cool. I wonder if the new "little" Jazz Chorus', (JC-22 & JC-40), match the classic JC-120 sound?
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Hello, I saw some pictures of you with a jazz chorus 120H. Do you have a photo of the wall where the board trails are? You put a photo of the top part of the board, I need a photo of the bottom part where the tracks are. I have the same one and mine burned and punctured the board where the 4 power transistors are connected. I really appreciate it if you can help me.
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Unfortunately, I do not have a picture of the circuit board traces. I want to help you and would if it didn't require me to take my amp apart. Here are some schematics I hope can help
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If the IC's are socket mounted it would be interesting to replace the 4558s with NE5532s or another more modern op-amp. I have read where people have replaced IC's on Peavey Classic and MusicMan hybrids with good results.
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