Just built a Foxx Tone Machine, and am having issues with the octave up being too harsh. It's basically useless other than single note playing

The normal fuzz sounds nice.

This build uses 3904 transistors and 1N34A Ge diodes.

Any suggestions on Q voltages, proper Q hFe, etc, would be appreciated.

Thanks in advance.

I wondered if I could swap the LED/LDR (or opto) for a FET, mosFET or 4049 gate (inspired by the PUP phaser series).

Here's the original:

I wanted to add a buffer, and that leaves me one opamp left on a quad, so I thought: What if I add dry non-inverted signal to the inverted filtered signal? The other frequencies should cancel out and the peaks should get peakier , right?

LTSpice kinda agrees:
( r being the resistance from point A and B to GND, where the opto is originally)

And a...

Recently I posted my take on bazz-fussifying the Escobedo Push-Me-Pull-You . I've been so pleased with this little octave fuzz I thought it was worth playing with even more.

The PMPY is divided into two sections: A simple gain stage, followed by the push-pull circuit that cancels out the fundamental to give the octave. So, I got thinking, what happens if we add a second stage of fundamental cancellation? Well, it sounds pretty interesting, that's what.

So, building on my last circuit, I added...

Hello everybody, I was searching a sort of schematic for the concert bass mod , or at least some info on which component to change/add to realize it, starting from the classic double SHO design...
Anybody knows something about it?
Thank you!!
Gianmarco

ge diodes for sure. put 'em in d3 -8. boom. def what i did on the original.
for the quad opamps, i went with tlc274cn

out of all the quads i had, these seemed to quack and sound the best.

intersil ca3080e's a must

there's new video uploading as i type this. it sounds pretty good. i haven't quite got it dialed in right yet but its pretty close. it even quacks without the fuzz in front of it.

so for mods, i went with a 500k trimmer for r5, which sets the gain of the first stage. turn til...

Hi all,
I want to share with the community a project I have started developing at the begin of the pandemic to keep my head busy: an 8 loop programmable pedal switcher.

The project is clearly inspired by the BYOC Super8, but I have used an atmega328p as center piece (since I knew how to work with AVR uC already). I then decided to add some MIDI support to make it more flexible to different use cases.

When the project was completed, I made the decision to publish schematic, firmware, and other...

Some ppl on amazon keep griping about this pedals lack of proper wiring instruction, it is a beginner level tho and so for beginners a wiring traced diagram sometimes helps which is what i am sharing.

The branding is Landtone but amazon labels it as TTone for some reason, They also claim it is a professional analog circuit (¿) I put it all in the title hoping people googling it can find it using those key words. It comes from China & works well to my tone deaf ears.

This pedal ive read is a...

Been working on this one for a while. Muff inspired. Pre and Post EQ controls, Parallel loop Mixer that functions as clean blend with nothing plugged in (switching jacks), parallel low-pass drive circuit for punchy deep bass frequencies, boost mode with pregain, fuzz, and master controls. Xmode switch gives frequency tripling aka crossover distortion and a mild gating effect.

For guitar, bass, synth or anything you want to make sound like a magical blubbery sea creature.

Clipping section is...

Many kilobytes have been spilled attempting to recreate the legendary Harmonic Percolator, and there are some that enjoy going to great lengths to find just the right transistors to recapture its classic sound. I'm more the type that wants to just shove any old BJTs in there and then jank with the rest of the circuit until it goes BRRRRRR...

I started with the Escobedo Harmonic Jerkulator:

Harmonic_Jerkulator.gif

Tim already did the work of finding sane values for a 2n390x transistor...

Cheers！for the crazy world——！

Hellooooo eeeeeeveryone. I'm back~

Three years of online college classes made me want to destroy the world...

During this time, I worked with my boss to make a distortion effect pedal,
although the cost is a bit high, but it sounds great, I put the circuit diagram here.

If you are interested, you might as well make one and try it.

Schematic_Tube_TS Drive-1.png

I used the AP1501-xx step-down switching power converter to save board size，
and the 555 as the...

So many different orange amplifier schematics and so many different topologies - I settled on the 72 graphic mkII to base this pedal on.
Hope you like it - here is the schematic for now - vero layout to follow shortly :wink:
cheers
bajaman
Baja OTR120 Graphic MkII pedal 9v 160318.GIF

Keep the clarity of your attack before letting the distortion embrace you: the best of both worlds!

At least that was the original idea behind this effect, to keep the gain low for the short-lived, high-amplitude note attack of a plucked instrument, then ramp up the gain and the clipping for the decay when the level becomes steadier. This is quite the opposite of what happens with conventional fixed-gain distortion circuits, where the attack of the note is the most distorted part, having...

Here is the latest - the Baja 59 Tweed Bassman 9v pedal.
Enjoy :wink:
bajaman
Baja 59 Tweed Bassman amplifier overdrive 9v 090318.GIF Baja 59 Bassman layout 090318.png Baja 59 Bassman vero cuts 090318.png parts not on board.GIF

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...