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...
Don't post in this forum asking is there is a schematic or layout or info on XXX pedal.
There is a subforum setup for requests already. It is located here:
REQUESTS FORUM
Any requests posted here will be moved to proper sub forum, and I'll also make nasty remarks about your mother. :mrgreen:
also, if you have a problem with your build, post it in the WORKBENCH. these threads are for circuit analysis only. by all means, if you discover something we should...
For more info on the Roger Mayer Octavia read this:
Octavia History - Truth revealed ?
this:
Octavia Evolution courtesy of Roger Mayer
and this:
Roger Mayer Octavia Octavio
and look at the:
Tycobrahe Octavia schematic
and the
Roger Mayer Octavia schematic
This is the wrong Helios schematic where all came from:
After showing you a couple of not-clones, here's a more original circuit I'm proud of. It's a parametric mid frequency eq with also bass and treble controls.
I think equalizers are very very powerful effects, altough they shouldn't be overestimated when post production is an option. Usually diy-ing a graphic eq is hindered by the amount of controls needed for a decent amount of bands, being them pots or worse, sliders. So I wanted to look for an alternative, and one which didn't feel like a...
Hi folks ,last week i trace ,a spark booster mini from a friend of mine.just only for learn how is work.
i triple check de values and the schematics.minus the switching system ,is very complicated, and we can put instead , a 3p3t switch.
Hello.
I have analyzed the schematic of a TBCFX mep3 pedal I have on hand.
The FET was unknown.
I found a FET that is close, but does anyone know what it is?
The pin assignment is different.
I will share it with you since I have it.
I am using translation software for this text.
Please forgive me if the text is strange.
I'm working on VERO layouts for the Blade VSC preamp and I'm also trying to create one for only the Mid-boost part of the preamp which I think is very nice!
Since I'm a beginner I'm learning as I'm going, working with bread board layouts and schematics and trying to create veroboard layouts from there.
It would be great if I could get some help with the layouts I'm creating!
The schematic for the Blade VSC preamp:
I've created this vero layout for it. I've verified the mid-boost part for...
I'm seeking for this pedal since a while. I only know it's a relative of the Roland AF100 BeeBaa (fuzz only, without the booster).
I was able to find a gut shot on reverb, and by roughly comparing it with a regular Roland BeeBaa schematic, I came to the conclusion that it shall be something like this.
PCB is double sided, so I can 't properly tell all the connections.
What do you think?
A guy who runs a component shop in Devon, UK, was selling bags of 400 NOS germaniums,.. some sold for over £600.
If you bought these, or know who bought these, PLEASE check them with a professional transistor tester that can detect internal shorts and bi-polar leakage (not a cheap tester off eBay), as one buyer has reported 41% were duds.
Anyone who did buy these can still talk to ebay (who are currently investigating) via the chat at...
I'm posting this here for the benefit of the community. It's my own idea of what a Rockman headphone amp should be like, made with modern, easily available components. It is intentionally not an exact clone of any specific Rockman model, because my aim right from the beginning was to make it better. I'd say it's closest to an X100 without the Echo part, but with a nice feature from the Soloist (the Doubler mode), and another really nice feature from the Ace series: single 9V battery power. I...
Hi! I have an interesting device. I started working on drawing his schematic. Everything is clear. Give me time and I'll draw a diagram. If someone already has a scheme, we will cooperate. :horsey:
A few years ago I posted the actual hfe of Q1-Q4 from a 1974 Rams Bead Big Muff with FS36999 transistors as measured using a Peak DCA55. They were: Q4: 163, Q3: 214, Q2: 171, Q1: 160.
Since that time I've worked on three more pre-1975 Rams Head Big muffs. Two had FS36999 trannys and one had 2N5133 trannys. Guess what...they all measured less than 200 hfe, lol. The one with 2N5133 trannys were as follows: Q4: 132, Q3: 117, Q2: 145, Q1: 128. I also noticed Kit Rae posted some of his own...
Anybody know what causes what seems to be an energization problem with these PDS pedals? The pedal will turn on instantly and light up, but the effect doesn't function until maybe 10 or so seconds. Switch to a different delay timing, and the issue starts all over. I've replaced all the aluminum caps but the issue pertains. One PDS pedal in the past had the same issue yet corrected with new caps. I have another chorus pedal of a different brand that has the same issue, but the caps are also...
I've always liked the tone benders, and thought that it would be fun to build a few with differing component choices and various transistors. Over the last few months, I've made about twenty of the things - all slightly different. I've extensively played through them, and have chosen the two or three that sound best (to my ears). The very best is shown here - it's a smoothed silicon bender, and just sounds great! All the other prototypes were put into diecast boxes and given to musician friends...
I traced this one a few months ago and never got around to putting the schematic up here. The only thing that bothers me is how the 9v supply is hooked up to the cathode of the bypass LED. I still have the box but the owner is not willing to desolder the caps to find the values. Any way to measure them in circuit to get a rough idea of what the are? In my experience NP0/C0G caps are usually lighter in color....like a grey and the X7R caps are a darker brown so that's how I marked them on the...
Transistors are BC549B (Q1) and 2N3906 (Q2 & Q3). Transformer is 3.6:1+1. It's not mine, but I might be able to get another look at it sometime if there are questions.
Has anybody played around with the Shure Level Loc Compressor circuit before? I has popped up on a few pro audio forums ( here & here ) and I was surprised to see that it runs on a 9V single supply.
I cut out just the compressor part from irfrench's 500-series version & built it up on the breadboard. Holy squish!!! This thing is like a tone trampoline. It clamps down HARD on the signal & has a much less transparent crunch to it than other FET compressors like the Rothwell Love Squeeze or Jon...
andregarcia57 
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