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...
Morecowbell, thanks for those great links you posted, but if they are all avaible from one location, it's better to just post that one link. If people are interested in discussion about this or that box, that can become a separate thread.
They are all in the $59-159 price range! Anybody has more info on this brand, we're still waiting for the english version of the website..
Ladies and gentlemen, let me introduce you the long awaited reverse of what some consider as the best chorus ever made.
It's taken from an original 80's version. I can't tel if the actually made SCF is the same or if there are revisions of the old one
BUT some will have to work a little on it : it was already a hellish work for me to put all that on tracing paper (and did some retouching with graphic editor) and lets say I'm not in the mood to finish all that in any CAD especially considering...
Anybody have a schematic for the Digitech PDS 8000? I have one that produces no effect and the infinite loop is locked on. I will at times get a digital squeal when the effect is engaged (and the infinite loop is too obviously) until I go back to bypass.
The schematic:
As you can spot it is a Ross Compressor clone; as I marked in RED the changes they made to the schematic. These changes don't sound really good...... my unit was really bright and 'Boring' sounding!!
is there anyone out there who owns a Guyatone PS-011 Distortion/Sustainer, and would be willing to post a photo of the wiring inside, with PCB? Maybe even schematics, but I won’t get my hopes up.
I’m working on repairing one that was in terrible shape, can’t find any reference images to help reconnecting the cables right. Looks like an interesting circuit, with a LM308N chip, like the old Rats!
So I am growing to love this community on here and want to contribute somehow, even though i am a noob. I really am impressed with this Harwire CM-2 overdrive. IMO they knocked it out of the park with this one. It ahs kicked my Zendrive and OCD clones right off the board at the moment! I rock it as a medium/high gain OD, in the modified position, gain at aroun 2:30 and bass up around the same. I really dig the low knob. Some cool looking IC's inside too. Looks like 4 of em?
The thing I really don't like with Wah Wah pedals is the on/off switch under the treadle, the way you can't avoid contact with it when you are working the treadle. I remember seeing a Wah Wah pedal with a slightly different design where the switch is under the treadle but there is a hole immediately above it in the treadle so you can work it without touching the top of the switch but still press the switch when you want to.
Can anyone remember what make the Wah Wah pedal is please?
Here's another weird pedal I never took the time to trace.
Sorry for the middle section of the schematics, it's very messy.
There's no values for the non-polarized caps, but I don't think they're that critical. I'll add them when I have the time to desolder and mesure.
For now, I'd suggest everything at 100n exept C16 which is probably around 1u and C1 & C2 around 1n.
As always, please tell me if you spot a mistake.
I recently got this vintage pedal PUE Sustain Filter (Poles are really creative at naming stuff), and it was described as Polish Big Muff, so I decided to check out the circuit. PUE was producing guitar pedals in the 80s in Lodz, Poland.
PXL_20240303_202929008.jpg
It has a plastic enclosure with battery only a power supply (however, the DC jack was added by a previous owner), and the PCB has a metal screen attachment, which is supposed to keep out radio interference. PCB is single-sided,...
I traced my Exar OD-02 OverDrive from series 2. Initially, I hoped that it will have the same circuit as OD-1, because most of the Exar series 1 and 2 pedals share the same PCBs, but it wasn't the case.
PXL_20221107_084857113.jpg
PCB is single-sided and was easy to see all the tracks on a light. My unit seems to be produced in 1996 or later according to the date code on the gain potentiometer.
PXL_20221107_084950567.jpg
It appeared that it is definitely not a TS variation, but a...
I was looking some Green Russian Big Muff Reissue Gutshots and i notice there's a Lot ou 104/103 parallel capacitors used as coupling caps.
I was wondering If it's just to get 110nf or If there's some other effect to the sound.
This OD-1 clone using a single chip ...just wanted to post it here 8)
The brief history of differant version from Boss.
OD-1A
Serial: 6400 - 6500
Marking of PCB: 052-281a
Switch: Transparent
Silver screw
OP-AMP: RC3403ADB
OD-1B
Serial 6600-8800
Marking of PCB: 052-281b
Switch: Up to 8400 transparency, from 8600 black
Silver screw
OP-AMP: Up to 8400 RC3403ADB, from 8600 uPC4741C (NEC)
OD-1D
Serial 8900- , 6 digit sticker
Marking of PCB: 052-281d
Switch: Black
Screw: 8900-0300, silver...
Not the best photos, sorry - cables get in the way. Really needs all the wires to be de-soldered to get a proper look at it.
Input is top-right of the circuit (W1 & W2), then heads down the right-hand-side, across & back up the left-hand-side. Looks like there ground plane on the component side of the board is split to improve input/output separation.
Most of the caps are through-hole.
A lot of SOT-23 transistor pairs C6 and DG . There are a couple of 8 pin ICs in there too. 99M...
Hey all here is a (re-drawn in ExpressSCH) factory schematic of the 1977-1978 era MXR Dyna Comp for your reference purposes:
I am not the original author of this product. The factory plan this is based on is very grainy and this copy that I re-drew is just to make it easier to read.
Just got this unit in as the owner claims it cuts his clean signal.......... wanted to compare it to the schematic posted somewhere else...... but I discovered some differences.......
By bernardduur at 2011-02-05
By Bernardduur at 2011-02-05
By bernardduur at 2011-02-05
Would guess the unit to be kind of true bypass........ guess the cut of the signal is more due to the True Bypassness :D
Hi does anyone have the schematic for the Twin Tube Blue SFX-11 or know the differences of components other than the tubes from the SFX-03 schematic . It looks like they use the same pc board.
Thanks PCB.
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