The research folders: please contribute whatever little piece of information you might have on stompbox circuits new or old. Discussion should be civil and to the point.
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Vintage Stompbox Corner ( ... - 1975) Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
Boutique Stompboxes dissected... General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
DIY Projects 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. Subforums:
Printed/Published Online Designs,
Original Tracer Layouts
Analysis Requests Folder Before you launch a request, please a) search the forum; b) search the web and c) share whatever you did find and where you searched.
I've recently noticed that Tim's great site at is coming up as a virus, trojan horse, or other bad things in my browser. So I thought I'd grab all the circuit images and zip them up for safe keeping. I have emailed him in the recent past, but there has been no reply. :hmmm:
Attached is a zip file of ALL of the effects circuits from his site.
Rock on, and may the creative spirit of the Great Escobedo be with you always. :thumbsup
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
This section is devoted to circuit analysis . This means...
requests for schematics or layouts will be moved the the Request section
messages about your sick puppy or your new Android powered phone should go into the FSB Café
debugging questions will be moved to the Workbench
useless post (containing no extra information) may get deleted to preserve the readability of the thread.
you should check whether a thread exists about the unit in question, and add your info in that thread.
you...
Hey lovers of the deep tone,
attached you can find my attempt to trace this big tank.
It's my second attempt to trace a pedal so please be kind. I used a continuity tester and the magnifying glass app with the flashlight of my cell phone to get it done. The schematic is made with Kicad.
Unfortunately I don't have a lot of knowledge in electronics. I don't now exactly which component is part of a feedback loop and which is a high pass etc or (and) especially for this pedal which component is...
Hello. I wanted to create a preamp on field-effect transistors so that I could connect various overdrives and fuzzes to it.
It turned out something like this:
To get 30V I used a module on XL6009. For now, this is an intermediate version, because I plan to try it with a bass guitar and, perhaps, some other moments.
Anybody have a schematic for the Luxury Drive? I've been wanting to try one out for ages but can't seem locate one where I live. From what I've seen in pictures, it seems like a simple circuit.
Press and hold the switch to reset, ramp up, and finally hold the control voltage. Higher CV=longer delay. Some of the values are altered to make it look better in the sim. More appropriate values shown in the image below. I have them this way in the sim because it's dreadfully slow to watch the circuit operation at normal speeds.
There are plenty of other ways of doing this, sure... but there's something satisfying about using the PT2399 itself to...
I've been on a quest to make a distortion pedal that suits the instruments I have and my playing style and so far I like this one the most. I'd been playing with non-inverting soft clip type of circuits (e.g. Tube Screamer) and didn't hate them, but when I tried stacking a boost in front I got an unexpected result - instead of more saturation I got more clean blended in with the signal. That might work for some people but it's not what I was going for.
The interesting thing is the case looks like a Maestro Fuzztone clone - inside it doesn´t match with the Sekova´s or anything else - especially because there are 2 Ge-diodes visible.
Any infos are welcome,
analogguru
apollo FAII unbranded 01.jpeg Apollo FAII unbranded 02.jpeg Apollo FAII unbranded 03.jpeg Apollo FAII unbranded 04.jpeg Apollo FAII unbranded 05.jpeg Apollo FAII unbranded 06.jpeg
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...
My first try at tracing a circuit and third layout.
The circuit has an input + buffered output and an xlr ofc.
Versatile as it can be powered 9-16VDC or by phantom power.
The layout is verified , as I built it a few hours ago and works perfectly !
Peavey-EDB1-schematic.png
Row H can be ommited as it is not connected to any component.
Hello, Is there anyone who has the Keeley Compressor Pro and can send me high-quality and high-resolution photos of its PCB ? I want to design a compressor with THAT4320 and I want to get help from this pedal. :D
A lot of people really like the old Rockman modules. They have been out of production for a long time now yet there are no schematics available. I understand the US patents expire after 20 years so they would not now be covered (?). Looking at pictures of the stereo chorus pcbs, it looks like it would be possible to clone it and I would love to have a go but without an accurate schematic it would be a world of pain. Has anybody else tried this?
Hello guys! 😄
I found this pedal sitting around in my drawer, something I got a while back from a friend who told me it was some kind of overdrive.
The pedal came with one knob missing and no labels at all. I tried to figure out what the knobs do and wrote down some labels I applied, but honestly, I’m not sure if I got everything right since I’m kind of a noob with this stuff...
Could someone help me figure out if my guesses are correct? In particular, I’m really curious about what the two...
Why is the guitar so good at picking up mains hum or are my guitars wired wrong? I have made two kit guitars a Strat & Les Paul. A similar problem of mains hum with volume position exists on both but the LP has unique wiring so I will just concentrate on the Strat. If the volume is set around 75% it makes the guitar a perfect aerial for mains hum. At full volume there is zero pickup as shown in the picture. Both pictures are 2mV/div so there is almost 10mV of hum. :o Is it my guitar and wiring...
Ok, I might intentionally have double posted this :D. I do apologise, but I think this might be of interest to more people.
I have some Qtron (+) mod questions:
1. Volume mod. I presume it would be done by adding a A10k in a standard way like this?
2. R32 mod. Is it the R32 as in the schematic of this thread ? And with what should it be replaced? I think it is already altered in this version as I read it was replacing the 100k with a 47k or lower. Am I correct?
3. Mix mod. Am I correct in...
This is the most recent refinement of a generic boost/buffer circuit I've been using for a while. It's a soft clipping boost with a subtle crunch, like a perfectly toasted bagel. Bypass scheme inspired by Valve Wizard , diodes-to-ground soft clipping inspired by Thunderbird (and discussed in this thread ).
I used a 10k linear pot but a different taper (log or audio I suppose) would let you omit R6.
My schematic says opamp_quad but feel free to ignore that and use a TL071 or similar.
D5/D6...