Original effects with schematics, layouts and instructions, freely contributed by members or found in publications. Cannot be used for commercial purposes without the consent of the owners of the copyright.
Original Tracer Layouts A collection of original layouts for vintage guitar effects. If you want to build real replica's of vintage pedals, this is the forum you want to look at.
This page tries to keep the available projects indexed.
If you want to share files to build a effect that's not yet (widely) available, it would be a pleasure for us to host it here.
The projects should be verified , though, and at least contain a schematic , some layout file (transfer, vero, perf) and a component layout file .
Incomplete or unverified projects will be moved to the Projects in Progress folder: if you fall upon such a project, please report the...
For a long time I've felt guilty that my pedal board didn't include a compressor. Finally, after about a year of breadboarding, I have produced a circuit that can take on a Dynacomp and win , boasting:
Up to five times more headroom than a Dynacomp
Less noise than a Dynacomp
Same available sustain as a Dynacomp
Fewer parts than a Dynacomp
Cheaper than a Dynacomp
Feedforward side chain
Possibility for all five controls
Fits in 1590B
Millennium bypass
I went on to try to find a matching pair of diodes for one of my built.
Long story short, I ended up measuring and testing a good part of all odd diodes I have had accumulated over the decades of tinkering.
Some are germanium, some are silicon, including Schottky, etc. I won’t talk about whether any of these sound “smoother”, “warmer”, “rounder”, “fuller”, etc. I don’t believe in tone wood either; nor that a measured 33nF cap will sound different than any other. Disclaimer being out of the...
I have the present circuit on my breadboard, and I would like to submit it to more experienced minds to see if there is any major flaw. My knowledge in electronics is purely DIY, on-the-go acquired, so even though my reasoning appears, ahem, reasonable, I'm always afraid to miss something crucial. So far it sounds nice to me, will probably mess with the tonestack and a few other values, but before going any further I hereby submit it here for criticism and observations.
Hi folks
here is something a little different - a bass amplifier 9v effects pedal :shock:
not built yet, but will post pictures when it is :wink:
cheers
bajaman
Baja Orange AD200B MkII bass head 9v pedal 270318.GIF vero layout.png vero cuts.png Baja Orange AD200B MkII bass head 9v pedal parts not on vero 270318.GIF
This is NOT a beginner's project.
This was traced from a recent B K Butler pedal and has the bias pot modification which alters the voltage on the cathodes of the 12AX7 tube.
You will need a suitable 12vAC power pack for this pedal - the original has a small toroidal mains transformer fitted internally near the front of the case.
The input and output sockets are isolated from the chassis by plastic insulating spacers. The earth pin on the input socket is connected by a parallel connected 100...
I had wanted to make a compressor circuit for a long time, because it's a popular and somewhat easy to make effect, but the existing DIY offer left something to be desired. You should be ready to accept some compromise, in the form of: noisy and hard to find OTA chips; expensive and hard to find (in THT at least) VCA chips; hard to find (again in THT) and fiddly JFETs; circuits that underperform in some way or another, or; circuits that aren't well translated to instrument input and stompbox...
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
Hot off the drawing board - vero layout to follow shortly :wink:
This is the amplifier that after the VOX AC30 changed the sound of British rock for ever - based on the circuit of the 1959 Fender Tweed Bassman it used the European EL34 entode output tubes because they were a lot easier and most probably a lot cheaper for Jim Marshall to purchase in post WWII Great Britain.
enjoy and have fun :D
bajaman
Baja Mars Hall 1959 Plexi amplifier overdrive 9v 090318.GIF
After finishing the Disappearing Act ducking spring reverb, I decided to do a version that uses the Belton brick for people who want something smaller footprint or who want some other features. I chose the BTDR-3 since it can do adjustable decay time and stereo output. The Escape Artist uses the same envelope follower topology, but the reverb path is different. The optical compression is the same, though tailored for the output of the brick. It's capable of huge washes. It can also do mono or...
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
I’ve always liked phasers, in fact one of my first pedals I’ve ever built was a Phase 45 clone. Not only I liked how it sounded, another main reason for choosing it (other than the complexity) was that I only needed two matched JFETs instead of, for example, four for a four-stage phaser.
I’ve been sitting there, content with my box, for some years, until recently I’ve heard of the Project 447 phaser on an old ETI magazine. It wasn’t perfect by most accounts (the long string of 741 op-amps in...
I've cloned the Xotic EP Booster from layouts and a schematic I've seen online. the HPF does not function if you follow the traced schematic. Suggestions have been to replace C2 10uf with a 200nf. I'm still finding this quite aggressive filter.
I noticed the F.briggs modded this circuit and removed this filter from the circuit but kept C2 10uf cap in place. Please can some help me understand what C2 does. Should I also be changing the value of C3 100uf rather than C2 10uf or both? I'm not...
Introduction
On my quest through re-imagining effects pedals, I felt like envelope-controlled filters deserved some attention. As it is usual, my motivation comes from the unsatisfaction with existing circuits: from the widespread use of OTAs, with their drawbacks in terms of distortion and noise, and limited availability in some cases; to one-trick pony circuits; to circuits that require matching; circuits whose complexity isn't reflected in the features offered. Ripple is another common...
This is my take on a classic variable state filter with optocouplers!
I added a few cool features:
- A possibility to control it with an envelope follower, an expression pedal or a control voltage. (You can actually use the 3 together, but it's a bit weird how it reacts!)
- A mix button, which allows for cool blending, phaser-like sounds.
Using the CV in with a good LFO, you can use it as a LFO-wha, Tremolo or 2 stage phaser.
It has a few imperfections though:
- It does not go into self...
Hey everyone, I recently finished my Disappearing Act design. This is an all-analog spring reverb driver with optical compression/ducking. The spring reverb driver section isn't terribly novel, but combining it with a full-wave rectifier envelope follower and optical compression on the reverb signal makes it so that you can get the studio effect in a pedal. It is designed for an 800 Ohm tank, so there are tons of options for tank sizes and decay times available. I have found it to be a ton of...
Hi,
I've some trouble to getting this simple circuit works.
elZKR.png
First question. The non inverting Input is @1/2Vcc. Other schemes put it to 0V. What's the difference?
If I've correctly understood, this summing voltage config create a virtual ground point at the inverting input. This point should be equal in voltage to noninverting input voltage. Am I right?
Second. The buffer (gain 1 noninv. classic buffer scheme) is connected to output of the uppper schematic. Should I interpose a...
A long time ago in this very same galaxy, i did a pedal called the Glorious Basstar:
It's a very very very cool multiband bass overdrive, but it's 8 knobs is kind of a no go for a lot of people.
So I went back to the drawing board and made a 4 knobs version called the Small Basstar. It has less possibilities, but still plenty. And it sound as big as it's bigger sister.
You can find a longer description on my website:
It looks like that:
So there is a kit version, and here's everything...
I am going to build a little splitter box to send two copies of the same mono signal chain to sample into the left, right or both channels of a stereo chain consisting of BOSS DD7-> zoom CDR-70 -> DITTO X2. I'm using a WOBO dual looper to route the signals
For the actual buffer, I was just going to use a single BJT or FET but hang two separate output caps and resistors from the emitter/source. However, a dual opamp doesn't take up that much more space and would require only a couple more...
Hi folks
Here is an updated version of my Baja SLO overdrive pedal - although the original design works very well, i wanted to get a bit closer to the individual gain stage's frequency and phase response characteristics and the only way I could see to do this, was to use four gain stages (not two as in the original BAJA SLO) matched to the actual four gain stage amplifier schematic :wink:
cheers
bajaman
Baja SLO MkII overdrive pedal 9v 030218.GIF
WhatsApp Image 2023-07-18 at 11.23.46.jpeg Hi, I'm a bit confused :scratch: with the thousands of D.I Box schematics out there on google. In the end I decided on one that I found on the E.S.P (Elliott Sound Products) page using a Triad TY-250p transformer.
Any suggestions on this particular circuit? or about how I have wired the transformer? It can improve?
Thank you. :wink:
it's a mod I did to the mini booster that was called the Fat Boostered on the GGG site. I called it the Fat Bastard (it was when Austin powers 2 came out that i did it), but GGG changed the name when they posted the schematic. Paul C
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This is one of favorites among the booster circuits!
Extremely versatile and sounds real good!
Layout; Correction by PaulC : C3 should be 33nF or 0.033uF; JFETs 2N5457...
I like to use relays on the builds which I box up, and I have been making use of a simple relay design by Chuck D. Bones at the PedalPCB forums:
relay-v1.1-schematic.png
I'd like to share the schematics, gerbers, etc here:
There is a through-hole version for self assembly. I've been using this for a while.
relay-v1.1-build.png
I also did a SMT version for assembly at JLCPCB. It's the same schematic but a smaller footprint:
relay-v2.0-build.png
I'm putting together a simple mixer, following Jack Orman's design...
I'll have 10K pots on the inputs... and it will be stereo...
and there'll be a C-Moy headphone amp in the end... (it already has a charge pump, producing 18V)
.....
As far as I can see, in mixer design they'll use an opamp to boost the input...
and there'll be other inputs as well without that... for the line level inputs, so to speak...
my little practice headphone amp will have 3 pots atop of it,
level in #1...
I decided to put an op-amp wrapper around the standard BMP clipper stages, and add my favourite tone control for real versatility. As drawn, it sounds really good, but has more top end than a normal BMP because there's no input loading effect. The capacitor in the feedback around the first op-amp stage could be increased in value (I have 47 nF there at the moment), to give a roll off similar to that which the original transistor input stage would cause, but other players like the brighter top...
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