I modded my old MT-2 (1998)
R41 - 22K
C34 - .047uf
D3 & 4 - 2 Red LED's
C25 - Removed
C35 - Removed
C36 - 1uf
I have tried the pedal on solid state devices, in the power and pre sections of both my amp (Fender 5150 III) and 8 track, and even on hacked radios turned into amplifiers to see how it translates.
I find in general, while the pedal is very usable in this state, it has a few fundamental issues (these mods do anyway)
I found the distortion was much more present with the bass all the way up
I found the mids to have dead spaces within the sweep ( things get pretty unusable with the mids, and on particular guitar/pickup combos, you get a massive boost of about 6 DB when you hit the mode.) There is also some modulation that oscillates on the release of certain notes when you get to a certain note/frequency.
The highs are ok, there seems to be a lack of usable hi end sparkle though, but considering what it was before... worlds of improvement. As a matter of fact, while testing the pedal with a buddy, he would forget that he was playing through my modded MT-2, because he comes over and loves to play my 5150 (loves that tube sound!) In short, it sounds like a Diezel, when the bass, Level and Distortion is at 100%, and it has more of a boosted JCM tone, when you start playing with the mids, but far less gain than it had to begin with.
With the distortion at 0, you still get a gritty sound, with distortion at 100%, you have about half the gain of what was originally on the MT-2. Volume all the way up provides a Tubescreamer like boost, it imparts some of the pedals tone, but it is a pleasant sound.
I also found that the sweep for the volume is not as strong (not as loud any more) and I will be looking into rectifying these issues with future project builds.
Feel free to suggest ideas, and I will do my best to accommodate.
For music, for science!
