so a friend asked me for a treble booster... well, they asked me to repair a rangemaster clone, it arrived doa, i said dude, i don't wanna deal with fixing it...i'd have to make it work to mod it, and i'm like... not worth the time/expence.

so i grabbed some random shit on my bench, and threw together my own.... sorry, no schematic or layout yet.... on perf, which i never used before. not sold on it..

but i wanted to mod it from typical treble booster, so there's a nod to the bazz fuss as...

Hello,

Yesterday I finished prototype of 6J1 (cheap Chinese tube) drive using 9V :D It sounds really awesome so I wanted to share it.
6J1_tube_drive.png

Heaters can be supplied by 7806 or by simple 100ohm resistor (min 0.5W).

R7 can be replaced by potentiometer (10K) to have simple Tone Control there. Or you can add any tone stack in place of R12. It works quite good as preamp with Fender tone stack.
Blue LED can be removed - but it looks so awesome :)

So, I built myself a Uni-Vibe.

I got an enclosure from Franco @ Argenziano Effetti, and originally was going to etch my own board but decided it was easier to get one pre-done from Brook at Pigeon FX. I used NOS 1/2w resistors (not sure brand, probably AB, had a ton of them), new Nichicon caps, some greenies from Tayda, BC108 in Q1 and 2SC945s for most of the remainder, but ran out and had to temporarily use some 828 pulls.

Originally I had some issues from wiring the transformer for 220v...

i'm looking to etch a PCB that would enable the use of a TDA1022P (16 pin) in place of an MN3002 (14 pin) but i don't know how the pinouts would have to be rearranged to make them match. i saw one available for purchase and was only $2.75 but the shipping was $30 from overseas. ( ) does anyone here know what the pinout conversion would be? it would be greatly appreciated! thanks in advance!

After getting a old PA sniffing unit that is similar to a transistor radio circuit I ordered a couple of small signal transformers intending to build a few circuits that I've been looking into.

Here's the first one albeit a bit more complex than I what I was going to build at first. My intention was originally was just a pickup simulator.

Right after the transformer order I got an Newcomb E-17 amp that I'm looking to mod, that thread is here.

So, I figured that instead of just making a...

someone asked for one... forgot how much fun this circuit is.

hippy getting old...lol

FUZZ ON

Hi guys.
I designed a fuzz circuit on silicon transistors with overload on germanium transistors. Germanium transistors will suit any. Recorded through a microphone from a SE amplifier with 1x12 Seventy 80

Schematic
Clean
Drive
Tone

Hello

I want to make a pedal out of the Nobel's Sound Studio (none of the modulations) and I am having trouble determining where the clean, compressor, and outputs are coming from the circuit. I have attached some cleaned up schematics, hoping they will help someone show me where the outputs connect to the eq sections. I can see how the (2) eq sections are connected, I am having issues seeing where the normal guitar tone would come from, compressor output is, and the overdrive section. Here is...

I first time to do it, i don't know is yes or not work

I really liked the sound of the very popular darkglass pedals, like the vintage and the b3k, but looking at the schematic it felt wasteful of components and with some weird values maybe dictated by smd. So i embarked on a journey to make my own workalike with the goal of keeping parts count and board size down, while trying to keep the same sound and staging. Doing so, the circuit went down from using a quad opamp, a dual opamp, an hex inverter and two jfets to just a dual opamp, an hex...

Revisiting a circuit I dreamed up years back and to the best of my knowledge this has not been done this way before so I thought folks might like to try it.
This does a fairly good job of emulating a spinning speaker effect.It's based on a XR2206 function generator chip and with a few added parts can do a Tremolo/Vibrato effect as well as a fake Leslie spin. Most of this is accidental discovery not brain power so I'm not sure how/why this works
but there is obviously some inter-modulation...

Howdy folks,

I am trying to put together a box that will fulfil the same purpose as this
frequency splitter:

I based this on these circuits: and . However I haven't done any circuit design or analysis forever, so I was hoping someone would be willing to take a look and advise on anything I got wrong or could've implemented better:

Thanks!

Hey!

I recently finished a PT2399 Tap Tempo project called Bontempo. It's based on a Attiny84A and a MCP41100 digital pot.

All details are on my website and Github

It probably can be of use to most people using PT2399 fo delay. Adding presets is pretty cool and I spent a lot of time on intuitiveness.

Here's most features :
- 40 to 1200ms of delay
- 6 tempo divisions (fourth, dotted eighth, eighth, triplet, sixteenth, sextuplet)
- around 30ms of modulation
- 6 modulation waveforms (sine,...

Well i started to work on preamp for Dual Rectifier like distortion. I started with by improving Dr Boogey. These things i discussed with you guy in this forum previously. Now i finally it is over and successful. I never intended to simulate tube sound but i want great sound heavey distortion like Dual Rectifier and now iam successful.
I present 2 design in front of you.

1) Driab2 (Dual Rectifer in box 2)
is the mu-amp version of Dr Boogey without tone stack. I added lpf before volume pot...

The circuit I've just drawn up (see below) was my first attempt at a phaser way back in 1972. The circuit was developed at Texas Instruments in Manton Lane, Bedford (where I worked for a while as a student). In those days, I used 741S low noise op-amps. The whole circuit works from a single 9V battery, and a friend of mine just built one using a lone TL074! The sweep oscillator is a Schmitt relaxation oscillator, and rather than take the squarewave from the output pin (which could be used to...

I don't usually design boosts or dirt box, but I thought I would have some fun with the Fuzzrocious Ram the Manparts circuit. I've made a significant number of changes, but thought I would pay homage to the name of the original with Rochambeau (or at least that's what my Southpark watching friends tell me). It's a simple affair, with huge amounts of boost on tap. As a standalone dirt pedal it's squarely medium gain is all, but it's quick, dirty, easy, and effective. If you want to build one,...