If anyone has some good pics of the part values please post them. It would be a big help - thanks!

While I've traced the circuit and I'm confident the circuit topology is correct, there are however many missing values. Some values are uncertain due to poor pics. Others I have outright estimated. That goes for both resistors and caps. I'm pretty sure the electros are correct.

To emphasize the incompleteness of the schematic I've only given it a draft version number of 0.1a.

The PCB pics come...

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

Hey - I have built these before, but it has been awhile. Got it all together and it sounds great, except when the Depth control goes past the 2 o'clock position it starts to thump, getting quite dramatic as the depth increases.

Voltages seem perfect - 9.2v in all the A voltage spots, and 4.6v at all the B voltage spots. Tried different chips, even a TL022 in place of the 062 with no change at all.

Checked for solder bridges and correct parts. Even moved the wires away from the 022 chip....

Factory Schematic:
Guyatone - PS-004 Flanger- factory schematic (1981).png

Enclosure Front:
Guyatone - PS-004 Flanger- enclosure front.jpg

PCB Top:
Guyatone - PS-004 Flanger - pcb top.jpg

PCB Bottom:
Guyatone - PS-004 Flanger - pcb bottom.jpg

Hi,

Here's a link to a dropbox folder with some guts of the Guyatone PS-007 Phaser, including a .svg file with the components values. I hope I did not mess with the color code though...

Guyatone PS-007 Phaser folder

Tracing ain't done, but it may be very close to Boss PH-1, or some other 4-stage FET phaser. The MA522 part is a low battery detection, see the schem I've made for the Guyatone PS-006 Analog Echo...

Enjoy!

Can anyone identify the model of this purple Colorsound pedal? I had thought it was a Wah Wah. But the double pot has me confused. The vintage Wah Wahs I have seen have a single pot. I have had it checked out at the local Guitar Centers store and it Wah Wahs only. Did Sola Sound offer all of this model style pedal in all colors? The two pedals I see in the attached August 1975 ad from the International Musician and Recording World magazine show the Organ Wah Swell and the Supa Wah Swell in...

Hoping for some help with a Tayda printing file. I have a project that needs an Adobe Illustrator file formatted for Tayda UV printing and I have zero experience or access to Adobe. Is anyone willing to convert a regular PDF to the correct specs as a gig job? Happy to pay for your time as I need this doing urgently. Thanks!

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.