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are they prone to failure?

k I'm still stumped.. here are some pics

K back to probing. Same problems. when used with a power adapter it runs fine, but with much crackling background noise.

Checking Q1 and Q2

Ah D3. The 1N914 looked suspect so I replaced it, the pedals seems to be working.. keeping it on with fingers crossed...

...been a minute still working fine...


..two minutes.. could this be the fix?

Q1 is 1.37v
Q2 1.96v
Initially values for the IC's were at 4.5v but after 30 seconds or so of being left on:
pins 1,2,3,5,6,7 of the RC455D are at 2.1v (?!)
pins 3, 4, 5, 12, 13, & 14 of the LM13700 also hover around 2.2v
The pins that should be +9v are reading nothing

I've been building for awhile now, very confident of my skills, most fire right up, no issues. Four builds back or so, apparently, after pulling my hair out, I re flowed everything and that fixed my issue, just saying, if you haven't tried it, it'd be worth a shot. Other thank that, how long does it take before it starts working again?


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I doesn't start working again lol. It basically stays as some sort of bass filter only allow bass frequencies through. When I first tested I was like "wow this filter is not being triggered at all"

oh also to save time, wiring is solid, no solder bridges, prefab double-sided PCB

Many times I've been sure of this only to find I forgot to solder an ic pin or had a cold joint or lifted trace or something. Do you have a multimeter? Take voltages at the ic and or transistor pins and post them here. Pictures of both sides of the board and a link to the build doc usually prove helpful.

actually I did forget to solder some IC pins on the socket then realized and removed the chip and soldered the errant pins, would that cause issues?

oh also to save time, wiring is solid, no solder bridges, prefab double-sided PCB

First is the pedal does not function correctly. When first powered on the effects works, but after a minute or less the effect dissapears. Could either of the ICs be bad? It was built stock from stock form a kit using supplied parts, minus one 10uf elctrolytic cap that was not in the kit, there was however a 47uf cap. I decided to stick with the build document and use the 10uf which I happened to have. Any help appreciated, I'm completely lost at debugging effects.

sure feel free to close this thread anyone

It is not a madbean or associated pedal. It's a GGG pedal and contact with them was brief. I'm not badmouthing anyone. And on the other forum (DIYSB) I basically got nothing, where to look etc. I originally asked it if it was tailored for bass, as it it definately was not working with bass. It turns out it's not working correctly period. When asking where to begin I get nothing. I have an audio probe. And i have indeed read geofex. I can't read schematics. If that's required then I have to learn. I'm a musician, not a scientist. I want to learn more about the effects I use, not invent them. Anyone is aware of how much "mojo" bs exists. I want to learn what's actually BS and what's not. I build these for fun and friends, once it loses the fun, then why do it?

Well to begin the pedal initially sounds fine but after a minute the envelope just.. dies.. stays on the low end. The kit came with a 47uf instead of a 10uf for one of the electros which I happened to have and swapped.

[rant]What makes this frustrating is posting on another board about it and pretty being much ignored, I can admit I know how to build pedals, but I don't know how they work, and of course when one doesn't... "go to geofex, read and get back to us ok?" attitudes[/rant]

His work is beyond commerical, it's art. Like a hand built amp, or guitar.. or custom fabricated car or furniture

I have a mu-tron micro-v clone not working properly and I suspect Mr. Sleep is too tied up for detailed support. Maybe I dove in too fast?