Compressor before Distortion vs Piecewise function generator before Distortion

In some patents, Tom Scholz extols the virtues of compression before distortion

In fact, almost every SRD product that has distortion stage has also a compressor before it

The compressor evens out the initial high energy attack and effectively boosts the sustain at the end of a note, feeding the distortion stage with a more even signal from start to finish than if it was fed directly with a guitar. This makes the...

Moen Jimi Nova vibe, excellent sounding easyvibe.

Strymon - Timeline, Mobius, BlueSky guts

Anybody know what causes what seems to be an energization problem with these PDS pedals? The pedal will turn on instantly and light up, but the effect doesn't function until maybe 10 or so seconds. Switch to a different delay timing, and the issue starts all over. I've replaced all the aluminum caps but the issue pertains. One PDS pedal in the past had the same issue yet corrected with new caps. I have another chorus pedal of a different brand that has the same issue, but the caps are also...

And the last for Today. Boy, what an ugly-sounding one this is.
Fortunately it bears enough resemblance to, let's say, a Roland Bee Gee to be able to do some overhauling and turning it into something else than a paperweight or door stopper.
As us', unverified, checked two times but not three, etc etc.
Can't for the life of me find the bloody pics of the innards, but if anybody needs/wants 'em, I can reopen the thing and take a few shots.

Enjoy!

I quite liked the stock sound on this one. I am using it more than my TS9 lately...
Should not be too hard to convert into a better thing though. PCB looks neat, no brittle feel or artifacts.

Mod ideas are more than welcome :)

Cheers!

i searched the internet for the schematic but could not find it, so i drew this in accordance with this strip layout here:

Who knows the circuit diagram?
I wonder if C2 and C3 have been swapped.

Any thoughts on the modified sustain values of the psi versus the original big muff? Not looking to modify the complete ic muff circuit, just this part around sustain knob..

Capture+_2022-07-18-13-00-38.png Capture+_2022-07-18-13-02-36.png

Had one of these obscure little buggers come across my bench recently so I thought id trace it. Its not exactly remarkable but does sound good. The original switching is garbage which is why ive highlighted to remove it.

Here we go!

Sadly it's all smd and the pictures don't help tracing (at least they don't help me doing that)

this is wha should be its pcb.
it is described as based on a fuzz face.
3 transistors...mmm
anyone has schematic? maybe some tonebender variation?

Hello.
I have analyzed the schematic of a TBCFX mep3 pedal I have on hand.
The FET was unknown.

I will share it with you since I have it.

I am using translation software for this text.
Please forgive me if the text is strange.

Anyone has schematic/gutshots? Supposed to be a pimped univox.

Well, stomping on this won't be very effective but I have played a guitar through it and I'm sure somebody wants to see the guts and schematic so here goes.
20220613_102407.jpg
20220613_102357.jpg
20220613_102413.jpg

Anybody have the schematic for the Yamaha DSC-20M chorus pedal? Pedal works under battery, but plugging adapter in kills all life; D2 diode also does not look original.

I hope this question fits in here since it isn't strictly a build question. I'm going to be using a Boss DD-5 as my stereo split on my next pedalboard. I'm hoping to find a way to experiment with parallel mixing a distortion pedal into the right channel only.

Does the DD-5 pass an analog dry signal, or does it pass a dry signal that went through the AD/DA converters when the delay is engaged? I ask because I'm concerned about latency/phase issues with mixing a parallel signal with one of the...

Hi
Im completely new to modding pedals so the crybaby true bypass mod is my first ever mod ,
The bypass mod works great but there is a slight volume drop and after a bit of research its my understanding that replacing the 68k input resistor with a lower value like 47k would help with this issue,
But as im new to the world of electronics i want to make sure i get the correct part , when i search for the part it comes up with 47k 5% 1/4w.
So i understand 47k ohm and the tolerance % but is...

Hi!

I recently acquired this effect and thought I'd upload some gutshots of it. There were some previous discussion and, now unavailable, pictures in the Zoom Ultra Fuzz thread. There's also a schematic for this floating around on a website (which I for some reason cannot seem to find at the moment).

Anyway,

Here you go: