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hey guys well i went to the dallas guitar show this weekend and purchased a harmony 535 head . it has about 6-12ax7 and 2-6L6 valves. so now i must start with the questions. is this amp based on the same architecture as the marshall jmp? this amp has no gain control only two chanel's and volume for each. how do i put a gain pot in the pre-amp section? i would like to have control of the gain. you guys said to get a cheap chasis and start from there if i wanted to attemp to build something comparable to a marshall jmp or jcm800 ,being ignorant i hope this chasis will work for me.


thanx ,

robert latham

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