I was wondering if there were any sources for reverse engineering pickups? I've seen this page a bunch with it's table of vintage Fender pickup specs: but I was wondering if there were any resources like that for other pickups? I'm aware of this forum, but it's less focused on specs of existing pickups:

Things like, bobbin dimensions, magnet type, coil wire type, number of turns, etc... I basically want a FreeStompBoxes for pickups, but I'll settle for whatever I can get. haha

anyone have one of these they can open up?

the original 1176 is crazy expensive these days. i thought it'd be pretty elaborate, but looking at the original 1176 schematic, seems like a couple JFETs and a some BJTs. presumably the pedal removed the 5532 differential input. and the marketing doesn't mention any transformers so i guess they skipped that too. runs on +30V and -10V, nothing too crazy.

they're charging $359 for a pedal clone, and i bet most of that price is just based on the...

Hello,
I don't have as much free time as some years ago so I'm selling my Transistor stock of 609 transistors in total.

I'm asking 75€ for all of them

Here is the list of what’s included:

SNALL SIGNAL TRANSISTORS

PART QT OBS
2N403 1
2N2222 2 the most commercially successful discrete transistor ever developed
2N3702 1 general audio
2N3904 9 Common, general purpose, VERY POPULAR
2N5087 5 Common, general purpose (BC560)
2N5172 5 Sam Ash Fuzz-Stainer, used in some WAH WAH pedals
2SA673 3...

Hello everybody.

Please excuse my english. It is not my motherlanguage. :-)

I already build a few pedals from pcbguitarmania and other sites. The only time i had to adjust something was when i build a phaser. In that case it was done by ear.

I`m not sure what to do with the three trimpots on the calvin vai.
How should that sound? Are there some voltages i should measure somewhere? Nothing about the pots in the building docs for that pedal.

Would someone be so kind and can advise on this?...

Looking for some pots like these. This is the PCB for the Roland G77

G-77-010-LRG-13.png

I put the Super Hard On inside a small 55x55x21 mm box and, not having the C5k, but also for reasons of limited available space, I would like to use one of the two very small pot of a Danelectro Rocky Road, one linear of 80kA and the other log of 80 kB. Which of the two is better to use to convert it to approximately C5k, the linear one or the audio one ? I tried a 5k resistor in parallel to 80 k linear pot between pin 1 and pin 3 but the excursion is not gradual and the gain increases only at...

I made some inroads towards tracing the PS-001 Distortion.

Turns out it is more than an MXR Distortion+ with a Muff tone control. Structurally it's more like a Boss DS-1.
(Given the similarity of the Guyatone PS-005 Overdrive to the Boss OD-1 it's not surprising there is some similarity to the Boss DS-1.)

Unfortunately there's some ambiguity regarding the tone control caps. (The two polyester caps on the middle-edge of the PCB where the wires are).

Enclosure:
guyatone PS-001 distortion -...

Guyatone made a large number of pedals by there's surprisingly few schematics.

I started off looking at the Guyatone PS-001 Distortion but there's not a lot of PCB pics out there.

In the process I found some info on the sister pedal Guyatone PS-005 Overdrive. At times people have tried to guess what this one is as well

I managed to trace the structure of the circuit. It looks like a Boss OD-1 (ish) circuit with a Muff Tone control. Unfortunately no values.
guyatone PS-005 overdrive -...

I’m looking for something like mesa boogie does for their pedals. Maybe use one of the companies that does metal biz cards? The thought is having universal cases for all products and use different metal covers for each product. This way I can gain flexibility by not having dedicated cases with silkscreens. A lot depends on the cost of the plate + case vs case + silkscreen. Also, those that use these, do you use rivets or glue or just count on the switch and pot nuts to secure the plate?

Hello there!

My friend gave me a nano Big Muff Pi NYC (rev A) and its volume pot fell off. I dont have the original pot but need a replacement. I read it is an exclusive model from EHX and their european repair centre doesnt have it for sale - I'm in europe and would like to avoid customs taxes.

If anyone can help let me know if you have replaced this kind of pot and what model could fit. It is a weird pot with 4 extra legs apart from the in/out/ground connections - 2 of those extra legs are...

Thought you guys might be interested. Analog devices shows a 5V to +/-15V converter for the LT1930 on page 8 of their data sheet. I've been using it in pedals with a 9V input since 2014. It switches at 1.2 or 2.2 MHz depending on which part you use. Just be aware, if you sell commercially, it pushes you into the range where you need FCC approvals.

I bought this PCB years ago, but I don't remember what it was for. Anybody recognize it? I'm guessing it was probably a fuzz circuit? Thanks for looking!

unknown_pcb.jpeg

Hi,
Just got one of these Gibson Maestro W3 boxes. It's working when let on for a half hour /45mins but needs some recapping etc. for any reliability but nice fuzz/octave - ok tremolo.
Works best with a slight boost pedal going in (with guitar) as these were to be used with woodwind mics at hi impedance.
Many Thanks in advance.
Satch

I asked chatgpt if it could reverse engineer a design and it said with good photos and part values it could produce a schematic. Has anyone tried this?

I'm going to speculate the KMD KP-300 Stereo Chorus is virtually identical to the Coron SC620 Stereo Chorus.

I've posted the schematic for the Coron here. If you have KMD KP-300 it wouldn't hurt to see if the schematic matches.

The common elements are:

- KMD units are likely to be made by Coron, or at least follow Coron circuits

- The eras for the two units are similar.

- The third knob is Tone on both the Coron SC-620 Stereo Chorus and
on the KMD KP-300 Stereo Chorus.

- The inverting...

I put together enough info to trace this one.

As it turns out it's a simplified Boss CE-3 Chorus.

The Coron is hard-wired to Boss Mode I *BUT* the normal output on Coron is like Output B on the on the Boss CE-3 ie. the Delay signal is inverted.

The stereo output on the Coron is nothing like the Boss unit, it just inverts the main output.

The Coron unit adds a Tone control. The way it works is it increases or decreases the pre-emphasis that is already present on most BBD based effects.

You...