Hi all, I have a tc electronics t2 (digital reverb). It’s generating its own noise, when I change the reverb settings I can hear that it has an influence on the noise. I have audio traced the signal to the ak4556 ad da ic. The signal gets to there then seems to have the noise on pin 8. I’m wondering if this means the ic has blown? I can’t find schematics unfortunately. Thanks all

Anyone had a chance to test it?

Seems it uses a PT2399 with Bontempo, according to the official website.

Amptweaker's first pedal design... lots of similarities to the Tight Metal/Tight Rock, but stripped down a bit. Less gain, no noise gate, a bit less tone shaping, no switches.

Schematic:
amptweaker-tight-drive-trace-schematic.png

Full tracing journal here:

PCB available here:

This one is pretty cool. A switchable silicon/germanium fuzz wrapped in Amptweaker's signature pre-drive bass cut and Muff-ish tone stack.

Schematic:
amptweaker-tight-fuzz-trace-schematic.png

Full tracing journal here:

PCB available here:

Pretty damn 'okay' and simple FET Compressor that relies on a BF244C as the control element.

The input volume control is the only control that alters the threshold/ratio. It's a dual gang 100KA pot.

The Release control is a 2.2MA pot.

I've not included the analog meter + driver, and the mic output.

I'm aware the 220n tant is the wrong polarity when the mic input is used, but that's how it's made.

If someone is to build their own I'd strongly recommend adding an output volume as the output...

Quite a simple thing.

I went back to the Fuzzrocious Ram The Manpart project that I didn't finish after the mods. I threw away (after modification with 10k pot//4k7 for better control) the starving circuit and wanted to get more overdrive-sound from it.

However, I did not know how to connect a suitable gain control. At the input, I didn't want to reduce the already low input impedance of the LM386, and at the same time I wanted to keep the minimalist form of the entire circuit. Finally, I...

HI,
I'm new. I have problems with the Ibanez AD 190 Time Machine.
I was given one but it doesn't work and I'm desperately looking for a schematic that I can't find. The machine turns on but doesn't make any sound, furthermore two jacks have probably been replaced and I have no idea how the originals fared as these are completely different.
I thank you in advance.
Diego.

At one time I was quite involved into J-FETs. I was originally drawn to them by (dare I say) the legendary A Discrete FET Guitar Preamp schematic by J. Donald Tillman. After a brief acquaintance with the functionality, I left the J-FETs and went my own way of buffers with bipolar transistors. Later I was looking for a schematic that would emulate valves and not be complicated, so I found the Fetzer Valve and I was back again.

I really liked the strict approach of the authors of runoffgroove to...

I've got about 20 CD40106 ICs that I got in a bulk trade deal, and I have no plans to really use them. I'd love to trade them for some pots and stomp switches.

Let me know if you're interested, CONUS only please.

Found this gut shot online. I believe this is the first version red one. I just purchased the 3rd version for 50 and certainly not bad for the money. However I opened mine up and the guys weren’t exposed. Didn’t feel like taking it apart. Wonder what’s hiding under that goo.

Second pic is 3rd version.

I miss the company. I’ve just purchased this thing and really have no idea how to use it lol. Seems like the left foot switch is going bad as well. Remember having his blender and comp and like both of those. A good bit of flux in there.

I have a guitarist friend who uses a TC Ditto+ looper pedal to store and replay his backing tracks..... But he hates having to tap twice to stop the looper.
So I built him a simple interface, to allow him to tap once to start -- and once to stop.

(I made some project notes here: www.loop.jp137.com )

It's a simple project using CMOS logic (no microcontrollers involved!) Might be of interest to other looper users who don't like the 'double tap' stop requirement?

Professionally made clones and not only for sale.Quality parts used.
Models:
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Free worldwide shipping.
Greetings from Bulgaria!...

Electronics-Illustrated-1969-11 Compress-O-Phone.pdf

Electronics-Illustrated-1969-11 Compress-O-Phone 1.jpg Electronics-Illustrated-1969-11 Compress-O-Phone 2.jpg Electronics-Illustrated-1969-11 Compress-O-Phone 3.jpg Electronics-Illustrated-1969-11 Compress-O-Phone 4.jpg Electronics-Illustrated-1969-11 Compress-O-Phone 5.jpg Electronics-Illustrated-1969-11 Compress-O-Phone 6.jpg

PDF: Electronics-Today-1974-12 Spring Reverberation unit.pdf

Electronics-Today-1974-12 Spring Reverberation unit 01.jpg Electronics-Today-1974-12 Spring Reverberation unit 02.jpg Electronics-Today-1974-12 Spring Reverberation unit 03.jpg Electronics-Today-1974-12 Spring Reverberation unit 04.jpg Electronics-Today-1974-12 Spring Reverberation unit 05.jpg

PDF: Electronics-Illustrated-1966-07 Tape Compressor.pdf

Electronics-Illustrated-1966-07 Tape Compressor 1.jpg Electronics-Illustrated-1966-07 Tape Compressor 2.jpg Electronics-Illustrated-1966-07 Tape Compressor 3.jpg Electronics-Illustrated-1966-07 Tape Compressor 4.jpg

PDF: ATR-1965-10-OCR-Page-0017 Volume Compressor Circuit.pdf

ATR-1965-10-OCR-Page-0017 Volume Compressor Circuit.jpg

Hello everyone!

I bought an 1989 MIJ Boos DD3 long chip version that didn´t work. After doing some measuring i recap all electolitycs and the pedal come back to life. But (allways a but) when the pedal is on i only have delay signal on the output. Studying the service manual i notice that Q8 and Q5 switch between on/off for stereo mode when you plug direct out and output at the same time. I don´t understand why Q5 its working like this and i don´t know where to continue lookinf for the fault....

Really low resolution schematic... just how they came, but there is more info here .

Screen Shot 2023-10-12 at 13.04.13.png

ohn Barbour History of 12AX7 Vacuum-Tube-Valley-Issue-01 J.pdf

Hey all.

I've recently finished this build with success (confirmed by me also). This one base on solely the schematics which had been shared here -from the 80's. But I'll need to ask a couple of things.

1- Biggest issue is, I have A and B tapered pots. I've tried A1M (only works good in reverse), B1M and B2M. Neither of them has an equal rising response on rate because the circuit itself needs a C1M pot and I can't find any in Turkey. Is it possible to convert any B pot into a C one? I've...

Hi and thanks in advance for any help you can offer. I have built 4 diy pedals so far that have worked as expected. There are some others that I simply cannot figure out what's wrong. I'm currently trying to build a Rebote 2.5. I am using the tonepad layout and there will be some mods I would like to try but first things first. I'd like to plug this in and have it work as expected.

What I know:
1. True bypass works: switching off the effect allows dry signal through
2. Switching ON the effect...

Hi all!

I got a unit in for some TLC

Voodoolabs - Analog Chorus.JPG

The NG-3 was supposedly just a NG-2 with the bias control made external. The NG-2 was said to have been traced in 2018, but this NG-3 has absolutely nothing in common with that trace, so I'm not sure what to make of it.

Schematic:
cornish_ng3_trace_schematic.png

Whatever the case, there are still some unsolved mysteries regarding the NG-2, so if anyone has some photos (and can get some different angles than the ones in the 2008 FSB thread ) then it would go a long way!

Full tracing...

Hi,

i'm the founder of LEMON Amps , and here is the schematic of the Night Screamer.

Night Screamer-V2.pdf

Cheers