Recent content by makisushi

i've swap the tl072 of IC1 and i still have the same voltage. I also noticed on that post that IC2 and IC3 have double the voltage on some pins. https://forum.pedalpcb.com/threads/unicab-no-sound.20474/ IC3 middle 1: 8.6 2: 8.6 3: 8.6 4: ground 5: 4.5 6: 4.6 7: 4.6 8: 9.2 IC2 top 1: 8.6 2...

Pin 5 of ic3 seems to max out at 3.33. pin 3 of ic1: what could cause that ? Non inverted input 1 so is it the chip itself that could be bad ? R3 is 10k than the cap . Could something "drain" the power ?

well, I must leave but so far no noise after the cleanup...

Soaked (99% alcohol) and cleaned with a toothbrush. Cold result, waiting for the pop to comes back. There's so much crap on the PCB, I don't know if you can see in the picture. I don't know what happened beside using aliexpress flux. IC1 (BOTTOM) 1. 4.38 2. 4.38 3. 1.15 4. 0 5. 4.39 6. 4.39...

so i removed the pcb from the enclosure, same thing: Pedal works fine for a while, and start to make noise after several minutes. If I bypass the pedal, no noise. wires is away from the pcb and doesn't seems to be the problem. It's really a popping crackling noise now. I also use the same wires...

Yes true it was loose from testing it outside the case .

Thanks that seems to be it

I grounded both in and out with the PCB, the case is bare metal so it's also ground. The noise still appear when the effect is out of the case . I will still shorten the wire to give it a try

I must also add that if I bypass the effect the noise disappear

Will do that this weekend and report back . Yes theres an adapter on the second video because I was using a stereo pedal before plugging this one

Thank you

It might actually be related to the input hot wire. I know the cable is not shielded but should it be that sensitive when I touch it?

yeah so i didn't touch the pedal for 20 minutes and now it's noisy (but still not sizzling). like vinyl crackling noise

I was mostly wondering what the manufacturer was. I thought the m was for motorolla but couldn't find anything related to m9441 or m9447.

yes grounds are there. I just unplugged the pedal and plug it back and it works perfectly, no noise at all...If I leave it plugged in, I'm almost sure that the kettle will start sizzling again. this is driving me nuts lol