Volume drop and weeping sound from Punk Repeater

[ghiekorg]

HI guys
Here is the layout: https://effectslayouts.blogspot.com/2014/11/dirty-punk-repeater-delay.html
Schematic SHOULD be this one, i haven't found a better one:


It works, the repetitions are kinda clean but i have 2 problems:
1- a really big volume drop when engaged. I used everything as layered out, i just changed the Q2 (BC459b) for a 2N5089 and i used 2 resistors (1M+330k) instead of the 250k i didn't have.
2- a sweeping sound when rotating the time knob: https://www.youtube.com/watch?v=UI5qxT5BFUo&ab_channel=ghiekorg (volume up )

Can you help me fix this?
Thank you

[11-90-an]

My guess would be a flipped transistor

Weep sound is normal... 

If that doesn't work then pictures plez...

[ghiekorg]

My guess would be a flipped transistor

Nope

Weep sound is normal... 

So much? 0.0 i mean, there is a constant whistle

If that doesn't work then pictures plez...

of the board? i would have to disassemble the pedal as i kept the wires super short  (i can take pics of the solder side though)

I was thinking maybe there was wrong (or something to be add) in the schematic (like something to push the volume up, addind a vol pot and some filtering session to filter the whistle) :/

[antonis]

Shouldn't an electro cap (10-47μF) be connected between pin 2 (Analog reference voltage - Vcc/2) and GND (Analog - pin3)..??

[11-90-an]

Nope

Just to get it straight, the perf layout showed the wrong orientation of the BC549. It is actually the correct pinout for a 2N5089 though...

So much? 0.0 i mean, there is a constant whistle

Oops... didn't really hear it too well...
Here's how the pedal should sound like... https://www.youtube.com/watch?v=a-aDx46PMaU (skip to 4:08)

of the board? i would have to disassemble the pedal as i kept the wires super short  (i can take pics of the solder side though)

yea the board... but I think other forumites could come up with a solution without looking at component side pictures so maybe solder side will do for now...

[Rob Strand]

Shouldn't an electro cap (10-47μF) be connected between pin 2 (Analog reference voltage - Vcc/2) and GND (Analog - pin3)..??

No cap across the 5V rails isn't good either.

[anotherjim]

The sweep whine would be expected with that design. It does almost nothing to prevent it. This might be deliberate, but I don't know why you'd want it to do that. Maybe I'm just not punk enough!
If you have a 9v battery snap to 2.1mm DC adapter, try powering it with a battery that way and see what happens to the noise.