Hi, I'm working on a project of simple DI Box with splitter/buffer functionalities.
The idea is to have a direct unbuffered output and some buffered outputs and ballanced output to send the signal directly to the mixer/audio interface. I want to plug it in somewhere at the beginning of my pedal chain using an input and a direct output, to affect the tone as little as possible, then use buffered output for some other purposes like recording clean signal on my laptop and an XLR output to send...

Hi all, new to the board, glad to be here!

I'm working on a modified Orange Squeezer .

I added an input buffer, and I'm going to use it as the first stage in a larger circuit. I attached a partial schematic showing the Squeezer portion - guitar input is to the left (into R1), output into an output buffer (starts at C30, lower right).

Here's my problem: the coupling cap C4 at the output of the 2nd op amp is swinging about -3v on the negative lead. Positive lead is ~4.5v as expected. No...

You gotta be kidding me...

Hi there,

I have a green box MXR 118 Analogue delay that i have brought back from the dead and am trying to align but cannot find the alignment procedures for clock frequency and location of trim pots anywhere...

It is the SAD1024 version with 118-3001 102 board.

I have found a couple of alignment sheets on here but they are for the PT2399 modded version and refer to trim at point A with no reference to what point A is.

Thanks,

Searches didn't clear up whether this was an optical compressor or not, so I had a look. I am guessing the big black cylinder with a triangle on the board next to it is the LED and photoresistor--does that seem right?

To save some squints, I observed a TL072 opamp, LM358 opamp, and a OP275G JFET. Seems to be some tantalum caps too. Transistors labelled 1AM (MMBT3904 from my searches).

Sorry for the lack of additional details, I just had it open and wanted to check it out....

Greetings

Re: Boss ODB-3 intermittent sound.

I have recently found in my collection of pedals, one of them.

The problem is that when I step on the pedal to turn it on, the sound is faded. It sounds like the effect is only kicking in very little. If I keep my foot down on the pedal, the sound Is perfect. I believe something is wrong in the switching circuit. I've tried looking for a schematic but haven't had any luck. Any insight would be helpful.
I'm using a Voodoo Labs ISO 5 power supply...

i have a boss od-2r and i am concidering moding a blend pot into it verses just buying a boss ls-2. i found this pedals sounds good with my bass but i would like a wet/dry mix.

this is the page that i am using the schematic from for the pedal, i was hoping for a little guidence on where i should try to make my connections/breaks for a blend pot if possible. i have not opened the pedal yet to see if there is any room in it for the pot, but worse case i can put it in a different box and maybe a...

Recently got a commission to convert this EQ to 1/4 jacks, new power supply caps and NE5532 upgrade to make it less noisy. I took a bunch of photos to post here for tracing if someone wants to have a go. I have one of these of my own too if I need to check any part values. MXR 10 Band EQ 01 .jpg MXR 10 Band EQ 02.jpg MXR 10 Band EQ 03.jpg MXR 10 Band EQ 04.jpg MXR 10 Band EQ 05.jpg MXR 10 Band EQ 06.jpg MXR 10 Band EQ 07.jpg MXR 10 Band EQ 08.jpg MXR 10 Band EQ 09.jpg MXR 10 Band EQ 10.jpg MXR...

The pedal works perfectly in 8 second mode. However, when I switch to 2 or 1/2, the effect doesn't work. When it kicks in, it basically doubles the signal overtop of the input, i.e. Just makes the sound a little warmer. There are no trails, echos, or repeats. The delay controls don't seem to change anything. The controls all work perfectly in 8 second mode however. I've recapped and swapped ICs. I get the voltages on the 4066 when sliding the selector switch. Interestingly, if I jump pins 3&4...

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.

Hi guys, I'm repairing this amp but actually I cannot find a solution.

Clean channel and Power Amp works correctly.
Boost channel works but has a really low volume.

In attachments you will find the schematics.

I checked the tube section and everything is fine. Autotransformer works.

Voltages at tubes are:

1 - 181V
2 - 110V
3 - 110V
4 - 5,8V
5 - 5,7V
6 - 110V
7 - 0
8 - 0,675V
9 - 0

D3 Cathode - 266V

IC3 and IC5 are working because the switch is works correctly. I don't have replacement at...

Recently I built an MXR GT-OD.

W20K is recommended for the tone pot, but I didn't have it in stock, so I made it with B25K.
I know that it is used as a replacement for the W20K in many TS pedals, and I also have a few TS pedals made with the B25K.

However, make my GT-OD with B25K, the tone was too dark when the tone pot was set to 12 o'clock.
I looked for other errors, but there were no special problems, so I purchased a W20K and replaced it.

There has been a big change. It gave me a...

It’s been a couple of years since I’ve made the first Pelota delay: from the very name, it was a circuit inspired by a few popular PT2399 delays, such as the Rebote series, the Deep Blue Delay, and many others that aren’t that different to be worth mentioning.

Even then, with my more limited experience and knowledge, I knew I could try to do better, starting from the awful, noisy, high resistance inverting input stage you find in the vast majority of them that makes you wonder who did it first...