Hy i would like to know if a could use this pedal on my Marshal JCM 900 4100?
This is a valve pedal!
I use yestarday, between guitar and imput, so the fuse valve melt.
Could you clarify this for mee?
I change the fuse and the head is perfect
Having never tried this particular pedal with the 4100, we cannot say whether it will work or not. If it is a distortion or overdrive pedal it should not cause any problems , if however it blew the fuse in your amplifier when used may suggest the pedal is faulty or not compatiable.
A distortion pedal will not cause your fuse to blow.. period. Sometimes fuses do just blow. If you're blowing more than one fuse, I suggest taking your amp to a qualified repair shop. Constantly blown fuses indicate a bigger problem.