Hi fourm. I recently received as a gift a Electro Harmonix Metal Muff With Top Boost effects pedal. I am having a hell of a time finding a schematic for it. Can anyone send me one or direct me to one? My email is chuck93274@gmail.com
I need to find out how to change the IC chips in it back to stock, and how to replace 3 surface mount resistors, and a technique on how to solder them lol.
Also I need to locate all the jfets on the board...
Its problems:
This pedal only gives sound at %95 volume turned up, when it goes below that its silent. Also when the distortion is turned up all the way, it gives a real bad his sound. The horrible sound almost reminds me of the EH Worm, sounds like raking pea gravel or something like that.
I have pics!!! lol 8)
Thanks.
(https://s14.postimg.cc/a115t6mql/31946479_441881492891325_2057347089209229312_n.jpg) (https://postimg.cc/image/a115t6mql/)
Those three resistors I am pretty sure are
R58
1M chip resistor
R59
1k chip resistor
R61
220k chip resisor
I need to find these replacement chip resistors. Then I gotta figure out which IC chips this pedal uses and replace them. I think there are 4 of them?
(https://s14.postimg.cc/64ntxaox9/image.jpg) (https://postimg.cc/image/64ntxaox9/)
One last thing lol I got a lot of tube amp questions.... Can someone recommend me a good guitar tube amp forum to check out?
Gotta peer close to the screen to read it but I think this one is it. Im still new to reading these things. :P
(https://s14.postimg.cc/c25y2mr4d/metalmuffschematic.jpg) (https://postimg.cc/image/c25y2mr4d/)
> only gives sound at %95 volume turned up, when it goes below that its silent.
Cracked pot?
Quote from: chuckusa on May 05, 2018, 11:56:35 AM
Can someone recommend me a good guitar tube amp forum to check out?
el34world.com is a popular one.
And ax84.com too, of course.
Broken pot for %95 volme problem, from the schematic it looks like the 4 IC's are standard 4558 op amps.