![]() I do have the amp disconected fromt he speaker box so it is not getting vibration on it which may be part of the issue if there are bad solder jointsĪt the same time I don't want to leave it on for to long with the heat thinking it will fry these components ![]() It seems the hum coming in and out has gone. Now the amp has a loud pop when turning on and VERY loud when turning off Since the resolder R20,R21,REG1 and REG 2 are all still very hot Previously R20,R21 and REG1 were getting VERY hot I found REG 2 point 'I' to only have a circuit on one side and not passing through to the other, I resoldered this ![]() I found REG 2 point 'com' to have had its trace completely broken, I managed to resolder it I had to put silastic under the REG's and resistors because the trace had lifted so no ensure no more movement * friend had tried to resolder some of the points.whether it was him or from the previous repair some were in very bad shape, traces lifting or broken *previous preamp tube had no glow to it, replaced I found a schematic here, it does not appear to be 100% accurate (I will explain why soon ) A friend of mine has a marshall valvestate vs265 amp that has had intermittent problemsīasically after a certain amount of time being on, a loud hum would come in and out through the amp, he said the previous owner had to get it repaired (mentioned resoldering stuff)
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