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Started by GIMAGUITARS, January 11, 2013, 06:07:25 PM
QuoteSYMPTOMS:-very low volume when plugged into external cab-When volume knob is turned all the way up there is a semi-high pitched hum-no noticible change when gain knob is turned
Quote from: GIMAGUITARS on January 12, 2013, 11:53:27 AMCan you suggest an alternate testing method?
QuoteTEST: Lift one leg on R6 and R11.RESULTS: measurments at MAIN SUPPLY RAILS (C17 & C18 2200uf/ 50v) still reading around 13.2v.Now that it has been established that the output stage is good, what is the next step?
Quote2) lift both "hot" secondary transformer wires (Red / Red) , turn amp on and measure AC voltage from each Red to ground.We expect around 15 VAC on each.
Quote from: GIMAGUITARSI haven't been "blindly" replacing parts as many of these parts were missing from this amp when I acquired it.