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Got a jvm410 H in and it makes an awful hum on od1 and od2 channels

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  • Got a jvm410 H in and it makes an awful hum on od1 and od2 channels

    Ok ive been looking and have found alot of people making simmilar complaints but with out any real answers other then stuff like use a noise gate/its a highgain amp live with it. But ive heard many many amps and fixed lots of amps and i know that this amout of hum is way over the limit. when you quit playing it is just as loud as the guitar. It went away when i had my guitar guy bring his duel coil guitar and play through it so then i thought thats it it was a single coil guitar that was causing the hum. But then it started doing it on the guys duel humbuckers. then i hooked up my signal generator and it tottaly hummed just as bad. the hum tottaly goes away when i ground myself to the metal on the amp, but ive checked all the connections and everything and all its grounds earth and chassy and cant seam to find it. and i dont know why it worked perfect on my friends guitar but not the other guys both with duel coils. and the hum starts very early in the signal flow cause its effected by every control. the owner of the amp likes his settings at gain 75 percent volume 50 on od 2 the red color switch. Oh and at one point i tried turing off all the lights and anything else on in the area and hooking up a 50 foot cable and walking as far aeway as i could from the amp and it didnt make the hum any less. ok thanks for any help i get.
    ok and i thought i should mention i did try diffrent cables diffrent cabs diffrent speaker ohm outputs every thing i could change it isnt a bad cable or user error i dont believe.

  • #2
    anyone with a vague idea possibly? ~,^

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