Hi! I'm trying to modify a Big Muff circuit adding clean signal blend. I've tried a few solutions but I'm not quite satisfied with any of them.
Initial idea was to add an input buffer (non-inverting op-amp) and split the signal into two patches also increasing input impedance significantly. I also wanted to boost clean signal a bit to make it more audible when the dry knob is set past 12 o clock. I've tried something like that (screenshot). What do you guys think? Maybe there is a good solution...

Good afternoon,

I was modding an unrelated Bad Monkey overdrive and one of the mods adjusted the intensity of the bass knob. I reverted it because it was too much for my liking, but it worked really well into my DS-1.

My question is, are there any ways to add a pre-distortion bass boost on the pedal? Hopefully one that wouldn't require I add my own little circuit board into the pedal?

The Sonicake Volwah is an extremely affordable, real estate saver of a pedal, with volume and cry baby wah style combined into one tiny enclosure. It has two LEDs which seem to be RGB to me since they are green when Volume mode is active, and red when Wah is active.

Without questioning it's build or sound quality, my main issue with it is that the LEDs are UNDERNEATH the expression surface. This pedal really small so you can't see it entirely when it's under your foot and that's just part of...

I just took apart my Amp Turbo. The board seems to be the same as the deluxe as it has the solder pads for the 3 switches and all the components. The components are surface mounted except the coupling capacitors witch are an orange film type, and the 2N5888 boost Transistor. All the clipping diodes are standard silicon diodes no shotkky diodes (bat46) in the boost section as a real amp 11. The boost section has 2 pairs of diodes that are selectable via the switch. One pair (D9,D10 )is a...

Hi all,

I recently bought a Brown Distortion pedal by Mosky, because I'd heard it was a clone of the Wample Pinnacle.
It does sound good, but I'm experiencing what I believe is the infamous sag issue, but that's not the point of this post.

Anyway I've opened it up and traced the components. It is indeeed a close copy of the Pinnacle, at least compared to the schematic for it that I found on this forum.
The layout is different and there are a few different values. It is well made and with...

Has anyone modded the GDI-21?
I think I'd like to add a mid control to it, True bypass, and fix the darn squealies the thing makes with EMG pickups.

I'm also considering using them as building blocks to build a 4 channel preamp.
I have a Tech 21 tri-ac that I love, and the Behringer GMX amp as a backup.
The gmx looks like two GDI-21 with a different input configuration on the jack.
The GDI just sounds like crap against the other two.

Anybody ever mod an Arion Stereo Flanger? I could use any help I can get as all I can do is switch out parts, no real technical knowledge at this point. But I do like to take the stuff apart and put it back together, especially when it sounds so much better after changing a couple of parts. Anyway if anybody can give me some info thanks very much.

Hey all,
first of all I may be posting in the wrong section, so mods, feel free to move the thread wherever it should be.

So I've read here and there about DemonFX and how they might be copying the cosmetics of famous pedals but not necessarily their schematics. That seems a bit silly and I don't see what they would gain from only doing half of the job.
Also I have read on Reddit someone said that Josh @JHS had (reportedly) had a look at the AT-DS and said it was not the same as their AT+ and...

he function of D14-15 is pretty unclear to me, they don't add clipping nor affect the volume or tone, so I just keep them in. D11-12 have the biggest effect on the distortion, you really hear the difference when you use a LED or silicon/germanium diode here. D8-9 have the least effect, I mean, you do hear the difference, but it doesn't really change the overall tone, the effect blends in with D11-12.
I use a Germanium in D8, D9 is standard, D11 standard and D12 a 5mm red Led. This gives me an...

Hello all.

I recent spent a Whopping $10 for a UT-300 Ultra Tremolo.

Great sounding tremolo, but does anyone know how to modify it to make the LED flash at the tremolo rate?

Thanks

Hey all, I'm new to the modding game and slowly getting my head around schematics and such. As I understand it, the DF-2 pretty much has the same distortion circuit as the DS-1, though given it's fitted alongside the feedbacker, the schematic to an amature is decidedly more difficult to figure out. Now, following it I can kind of see how the distortion's the same, but I'm not so sure on how to perform DS-1 mods on it without possibly bricking the whole thing.

Mostly I like the big fuzzy mods...

I have a cheap rat clone and i'm quite happy with the tone as it when using it with my guitar on 10. ALL my guitars have treble bleeds and when i roll off the volume for clean tones which my amp does quite well, it's cleans up nicely and gets nice and chimey. But not with the RAT. Had the same issue with original RATs and ones i have built. The tone gets dull like you turned your tone control too far down. I have tried every setting possible on the amp and pedal but it's just one of those...

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I had measured all these but my daughter in a fit of creativity drew pencil all over my original schematic – do these numbers check out?

Edit: R8 had a strange value, removed from schem

Hi folks,

I've bought a cheap Belcat PHS-605 Phaser and it arrived some days ago. The build quality and sound is okay for 34 bucks, A bit too much flux is the only thing to complain about. I really dig the sweet graphic design and clear knobs.
It didn't work at first so I opened the housing and found a trim pot. It turned out that it wasn't set by the manufacturer at all.
I setted it by ear. A little tricky, but it worked for me. I used the Rate ​​in the middle and depth all the way up...

I´m not quite sure if a 49€-pedal qualifies as cheap, but to me it does.
I acquired a Nobels PRE-1 for 30€ used and I figured I´d do a few things to it. It´s built rather sturdy.
As a starter: how do I change the frequencies of the treble and bass bands.
Can anyone explain what the circuit is called and how to calculate the values for different frequencies? The manual states 25Hz and 10kHz.
What type of EQ is this anyway? Shelving?

A musician has asked me to increase the output level of the chorus a little bit.

To do this, search for resistance R19 (10 k) and shrunk it down to desire (smaller = more output level)

I decided to solder a trimm pot (25K) on the back side of the pcb parallel to the existing R19, now you can set the output for your choice.

A relatively simple modification - have fun.

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