Okay, for some reason after work (12 hour night shifts suck) today I ended up trying to learn Slayer riffs (I know, I know - it's a challenge, please don't pick on me - I was trying to play Stones and Hendrix yesterday if it makes you feel better) - mostly to play with my Boss Super Pitch Shifter in an attempt to emulate the two guitar harmonys. Anyway, to get a workable tone I pulled out my old Boss Metal Zone, and after realizing I'm not really a metal head, (and the batteries on my practice walkman dying out) I started playing with the Metal Zone, and while I'm not a huge fan of the distortion sound, I was really digging the tone controls - it made the pedal a lot more versatile than it might otherwise be. So I went hunting for the schematic, interested in the idea of splicing the tone controls (particularly the whole mid boost/cut and mid frequency knob idea) onto a distortion circuit I'm more into.
I found a couple links on the schematics (http://www.diystompboxes.com/pedals/schematics.html) page here, and downloaded the two part .jpg set, and the .zip file, and compared the two and tried to figure things out.
So if you download the .zip file - ( http://www.mif.pg.gda.pl/homepages/tom/files/MT2.zip ) and open it up, and look at the "mezon2.gif" file - that seems to be the tone control bits, right?
So a few questions -
I assume the sort of sideways slashes (like coming out of the 2k2 resistors) are connections to ground?
That file has "1/2v+" connections - the other file (the two part .jpg one) has "4.5v" connections - I'm assuming the later is correct, and the first just means 1/2 of the voltage, not a half volt? And this voltage really just depends on the op-amps I use in the tone controls anyway, right?
Looking a the "mezon2.gif" file inside of the .zip file again, if I wanted to try splicing this into another distortion circuit, I would do that towards the end of the circuit, and the signal would come "in" the point labelled "B" and "out" the point labelled "C"?
Changing it up a bit, is this a good place to use some of those quad op-amps I have lying around, even though the original used duals?
I think that's all I have to ask right now - I've never really hacked at anything quite this much before - I was thinking for now I'd try sticking this on the end of a dist+ type circuit, since that tends to be my favorite distortion lately, and I often find myself heavily EQing it when I run it into the computer, fooling around with mids and such, so I was thinking this sort of EQ might be fun. Or it might not work at all. I guess I'll see. Any general pointers people have would be nice.