All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
- Chuck D. Bones
- Posts: 2
- Joined: 17 Dec 2017, 17:40
- my favorite amplifier: Marshall 1967 (actually the EARTH copy)
- Completed builds: One-knob fuzz from P.E. Feb 1968 - 1st build
IC version of Big Muff (before EHX ever marketed one)
Custom flanger pedal
EQD Hoof with added mid boost switch (PedalPCB Ungula)
Boss DS-1 with seeing eye mod, 1st-stage gain switch and tone mod
Shaky Jimi modded for improved speed control range and throbbing LED
Boss CS-3 with cap upgrades
Friedman Dirty Shirley (PedalPCB Brown Betty) - most recent build
Tweaks to some OOP Monoprice distortion pedals
- Location: Somewhere in L. A.
- Has thanked: 7 times
I see something that looks wrong. IC1.2 is supposed to be a mid-boost stage, but R30 is so large that the mid bump is barely 1dB. R30 is at least an order of magnitude too large. I'm guessing R30 is more likely 10K. The Sanguine has the same problem. Has anyone actually measured these resistors? I know surface mount resistors are hard to decode sometimes.temol wrote:It's a DPDT (SW1.1 and SW1.2) on/off/on switch. So in a middle position C7 is disconnected.