BIG MUFF self oscillation issue

[Harly_Wake]

Hello everyone, I have a problem with self-oscillation(then guitar rest or jack unplugged) on Green Russian Big Muff, does anyone know what the problem might be? I am 90% sure that these are not bridges, because I made builds for three different layouts, but the problem remains the same. Thanks for any tips.

I also noticed that the oscillation ringing stops when I touch the first pair of diodes on the board.

That's last build i used, seems pretty much same as the original schematic.

[Harly_Wake]

image with outputs

[antonis]

Hi & Welcome..

Try to shield your board (by wrapping grounded aluminum foil..)

Irrelevant to your issue:
What is that LED/22μF/4001 wiring..??
(it looks like reverse polarity powering LED indicator..)

Not good for circuit BJTs 'cause it doesn't short reversed supply..  

[Harly_Wake]

Thank you, Ive been hanging out on this site for half year now, but I only registered yesterday

Here's the thing, this layout is not mine, I found it on the site

https://effectslayouts.blogspot.com/2014/12/electro-harmonix-rams-head-big-muff.html

and I did this Ram's Head twice, both worked completely fine.

But then I wanted to make a green russian and after several failures I decided to make it based on this layout because it worked okay and it didnt work just like the previous G.R.s from the same site.

And Im not very experienced yet, so I dont even pay attention to the reversed led, because it just worked and thats it. But thanks for the notes, Ill correct it and maybe fx will be fixed. Will keep that in mind for the future.

[antonis]

Can't figure out the way the LED worked (without below ommited connection)..



P.S.
I suspect power supply reverse polarity connection (the only way LED could work..) and I'm afraid of your BJTs health..

[Harly_Wake]

oh, my bad, I posted a screenshot of my layout, and during
copying the project, I missed the track. but actually I made the board as you drew, so it's okay.)
I came for help and confused others myself, sorry about that))