I don't have the original article, so this is like a request. There is no information or secret schematic to be discovered -- would just be nice to have the original article. This project is not in Craig's book as far as I can tell and Guitar Player Magazine is probably still copyrighted. That does not mean we cannot sample that one article for non-commercial purposes under 'fair use'.

The realisation that Way Huge's Red Llama was simply this DIY circuit, had already seeped through on the...

Hey

I obtained a KORG DTR-1000 from ebay. Attempting to fix it.

There is no input getting to the tuner section. Power and tuner lights come on. I've confirmed that the power supply, and mute relay circuit is all working correctly.
So that leaves the FET/Op Amp input to the tuner. Using signal tracing I've confirmed the faulty component is the BA10358F op amp. I get a signal at pin 2, but no output from the first 1/2 of the op amp.

BA10358F is now obsolete. Its a 'ground sensing' dual ap...

Considering only about 50 of the Rockman Ultimatum Distortion Generator pedals were ever released, and having gotten my hands on one for a time, I thought it wise to trace and verify the circuit. I spent a good amount of time, coincidentally with Robert (@PedalPCB) doing a trace of the same pedal at the same time, I took the time to breadboard the circuit based on the trace I made - but without the low-battery and buffered-bypass sections.

The complete set of notes, layouts and schematic is...

I have had a similar problem develop on their garagetone Tremolo pedal. This time its the open road pedal(clone of nobels odr1).

Both pedals are supposed to disconnect the battery when the input jack is unplugged.

Both of them start to generate lot of hiss and some sputtering/pops/static when I power them with a powersupply and the input cable is unplugged. With the input jacked plugged in the white noise decreases but the sputtering is still there. The noise is little less when using a...

Hi everyone.
I have some questions for more experienced builders in the community, that may guide me to the right direction.

After having built several 9v pedals, lately I put my hand on higher dc voltage circuits mainly for use with line levels.
So I'm starting to think of a 12-15v bbd stereo delay unit.
I'm thinking of using the aqua boy lay out with 2 bbd ics (and the extra modulation tweek).

Do you think that the higher voltage will be beneficial for more headroom and less noise and...

I've been reading about different projects for beginners and trying a few which has been fun.

What's surprised me is how quite a few pretty expensive boutique pedals are pretty simple, and pretty easy to clone.

So I was wondering what people could list as the pedals with the highest ratio of exclusivity/boutique-ness/price tag to ease-of-build?

One that stuck out early on was the Shin's Music Dumbloid Boost Overdrive Pedal. Another (less pricey, but also less complicated) example I came...

Hi everyone,
This is my first post. So bear with me. I've built a few pedals - a treble booster, a couple of fuzzes, @dylan159 's Quick Shave and have a reasonable handle on soldering, etc... I'm wondering if anyone can give me any advice on a potential project. I'd like to take the OD channel from an old Crate GX15 amp and put it in a pedal. From what I can see it's a stacked Op Amp type distortion circuit?

Could it work on 9v? And if so what's the best way to make it happen? A bonus would to...

Hello
I lent out an ammoon stereo looper (vague clone of the ehx 720) and it came back dead. I plug it in with the power supply in my studio and nothing happens, no leds light, no sign of life. I measure 9v at the power jack, and get similar voltages around the diodes and components in the attached photo. The schottky D2 seems ok : I get 9.12v on one side and 8.76v on the other, a 220R resistance one way and infinite/open the other.
diode D4 next to it reads 10 ohms resistance both ways. Is...

I recently bougt this defective BROS Distortion pedal and traced it.
The BROS Distortion is almost the same as the Soundcity DS-04 Distortion.
There are two differences the resistor R1 has a value of 4.7 kiloohms instead of 2.7 kiloohms on the Soundcity pedal,
the DIST potentiometer (R8) has a value of A50K instead of B100K on the Soundcity pedal.
Here the link to the post of the Soundcity DS-04.

BROS Distrotion Top View.jpg
BROS Distrotion Wiring.JPG
BROS Distortion PCB Top View.JPG...

As promised in my previous post about Hiwatt Tube Overdrive, here is the second pedal from this tube series of pedals. Unfortunately, I don't have access to the remaining three (hi-gain distortion, phaser and tremolo).
IMG_2827.JPG
You can get really great sounds from this one. The controls are versatile enough to give a wide range of sounds from medium overdrive to nice big distortions.
Gutshots:
IMG_2829.JPG
IMG_2828.JPG

Again, I went and whipped up a schematic:
Schematic_Hiwatt Tube...

Hi folks,

Been tinkering with a circuit of mine for a while and trying to get around a design knowledge problem I have.
Basically I have an Opamp Big Muff running into a James Tonestack and I wanted to use a TL074/Quad Opamp so I used the last Opamp stage to act a boost.
I *almost* got there – the design works but I tried to be clever and have a pot in the FB loop of the opamp to act as a volume, with unity as 0 and boost from there.

The flaw is that at really high EQ settings (Both Treble...

I bought a long time ago this BOSS-SD1 pedal with the so-called DENIZZ mod.
About this mod I could not find any information.
There are foil capacitors exchanged for WIMA types and some component values changed and also components omitted and replaced by jumpers.
Carbon film resistors in the signal path are replaced by metal film resistors.
Some diodes and BJTs other types.
D3 omitted and jumpered.
R31 omitted and jumpered.
D1 Zener 11V exchanged for a diode 1N4001.
The operation with AC via the...

So I breadboarded an Escobedo Push-Me-Pull-You the other day, and while it gives a decent octave up the fuzz was kind of weak (at least, on my breadboarded version).

So I says to myself, let's drop that gain control. Nuthin' good happening under max anyway.

Then I says to myself, what happens if we replace that feedback resistor with a diode, say a white LED? Well, what happens is that first stage becomes a bazz fuss and you get that glorious BF sound pushing (and pulling?) the octave...

I thought this might be of interest. It's a kind of modulated doubling delay.
This particular unit is quite distressed. I've traced it to help debug it.
Switching and power are not shown. It has it's own plug, and i couldn't be bothered to follow the wires around a transformer and bridge rectifier etc. There's a couple of regulators for +15V and -12V.
I'm not very experienced with this stuff, so please take it all with a grain of salt.

It seems like a previous owner tried some...

Here's a trace of a J. Rockett Tim Pierce signature OD that I had on hand. It's a dual pedal with a four-knob OD followed by a MOSFET power amp boost. This PCB is stenciled rev 5 and the pedal dates from 2015. This post is mostly for curiosity's sake since I couldn't find an existing trace. It's a decent but not spectacular pedal and there's nothing innovative inside.
TimPierce8.jpg
TimPierce7.jpg
Tim Pierce OD Analysis.jpg
Tim Pierce OD schematic.pdf
The most interesting thing about...