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Hello again, finally I reached what I wanted by modding the Integral Pre with a simple voltage divider. As Chuck wrote, there are some obsolete parts in this circuit and their footprints are quite helpful: First I bridged R2+R3 and mounted a B5K pot between 1 and 3 of Q2. At 5 Ohms it...

Got some other BJTs from my local electronics dealer: hfe V IC1-6 2x CTBC548 427/428 19,2/19,4 2x BC549B 283 18,9 2x BC549C 495/523 19,6/19,7 Strange, that the 550 mentioned above leads to 10,6V at IC1-6, having nearly the same hfe as the 549C ... For the sound these all make...

@Hexjibber did you solve your problem? I had the same issue with mine. I rewired it completely and used shielded wires to the input- and output jacks. Just touching the isolation(!) of the input wire made it go wild on noise. Now it's much quieter and only squeals if i crank up volume to max...

Had the same problem, especially when I cranked up vol, gain and treble and had the toggle switch in position 3. When I just touched the isolation of the wire from the input jack, it got really noisy. After using shielded wires to the input- and output-jacks it got much better!

Ah ok - had the looper connected from audio probing. Now with my guitar plugged in and volume set to 0, I measure exactly 20,6V at pin 6. I compared to my Triangulum: Vcc and Vref are nearly the same, pin 6 of TL071 only has 10,6V. Replacing the TL071CP through the TL071IP from the Triangulum...

Tested it and it looks good ...? IC1: Pin 1: 150mV Pin 2: 28,3V Pin 3: 28,0V Pin 4: 0V Pin 5: 150mV Pin 6: Jumping around between 2 and 20V Pin 7: 31,5V Pin 8: counting down against zero I now also think it works as designed - I re-tested it against my Triangulum and finally I can at least set...

Hello again! I'm a bit confused now ... it seems like I have two problems and the guitar ouput is none of them. Audio probing showed me, that the distortion starts at Q2. What goes into pin2 of IC1 is already really dirty. So in my eyes the BC549C seems already to be a problem. I removed Q2...

The most crazy one he has 😜 It's a Humbucker, named TOZZ B Fat XL. Sounds awesome, but is almost a bit too loud. I had to increase the distance to the strings because it even drove my Diezel Hagen into a fuzzy distortion. Yes, unless I turn down the guitar's volume poti. The guitar was plugged...

When I disassemble it (today or tomorrow) I will make photos! Btw: I have a triangulum built by a professional pedal maker and it has the same problem but by far not so intense. I tested changing my BC549C (I read it's an equal replacement for a BC548C) against the BC550 he used, and couldn't...

Thanks! :) I used black water dye, and as finish I used hard oil. Since I used that combination for guitar builds I'm a big fan of this: The water dye gives interesting colors depending on the wood you take. And the hard oil is just a pleasure to use - not toxic and in opposite to hard wax oil...

Ok, this might be the same problem as described here: https://forum.pedalpcb.com/threads/help-please-debugging-how-to.3047/ I will audio probe it, and see where the distortion appears ...

Hi there, this is my first build ever, I'm proud that I've got it working and want to share my experiences! I wanted to build a case for my 19" Palmer Macht power amp, that I kept when I sold my Kemper, to be at least able to play through plugins on my 1x12" cabinet. Building an 1U box around...

Hi everyone and at first thanks to all writing here! I built my first three pedals, ran into some problems and learned so much by fixing them. But now I think I need some more help :) I built an Integral Preamp and it does what it should, except it seems a bit overstrained by my passive, but...