Hi Everyone, I'm new on here and am the original owner of an early 80's Yamaha C-60 control amp along with an M-80 amp. My question is the pre out on the control amps right channel works intermittently and I figure its the chassis mounted RCA jack. Does anyone know exactly what this jack is called (its a dual jack R&L channel) and where I can get one? Also, who might repair this even if I have to ship it to be repaired. I may be able to do it myself as it doesn't seem too hard, no visible cracks in the board or anything. I live in East Tennessee. Any help would be appreciated. Sorry this is so long.