My univox super fuzz pedal kit won't work

[snow123]

ok, now that im done with the build, what do the 2 trimpots do? i know 1 controls the clipping, but what does the other one do?

It adjusts the octave - subtle changes, don't expect anything extreme.

ok, thank you.

[duck_arse]

HOLY SHIT THE PEDAL WORKS NOW

I don't think anyone saw that coming   

I didn't see C16 coming. how are we going to fill another 90 pages, antonis?


if you tune the octave trimmer very, VERY carefully, you should be able to hear a point [actually two points] where the background hiss from the circuit drops quite a bit. this might be the maximum octave point, but it might also be not the best sounding point.

and well done on the fix. what's next build?

[bluebunny]

how are we going to fill another 90 pages, antonis?

Turn this into an astronaut (the other) project?   

[antonis]

how are we going to fill another 90 pages, antonis?

We still have two trimpots to deal with, don't we..?? 

[snow123]

also, when im playing through the pedal i get a weird phaser/filter effect in the background. is that normal? or is it cause of some of the mods in the circuit i build?

[andy-h-h]

also, when im playing through the pedal i get a weird phaser/filter effect in the background. is that normal? or is it cause of some of the mods in the circuit i build?

Keep in mind that this is a pretty intense octave fuzz.  As much as I love the Super Fuzz, I don't love it for full chords, cause it doesn't always sound right.

The mods you have don't fundamentally change the circuit.   They aren't causing the effect.   

[PRR]

....plastic package implies a PN2222A or a P2N2222A, those two have opposite pinouts.   A plastic package 2N2222A has an ambiguous pinout.    If I had to guess I'd probably go with the PN2222A pinout, ....

The May 2021 issue of QST has a note that some variants of the 2N2222 have varying pinouts.....

[Rob Strand]

Quote from: https://www.diyaudio.com/forums/parts/372810-pinout-issues-2n2222-pn2222-p2n2222-transistors-post6669099.html

Interesting the problem has popped up again.

A common part for a zillion years, now on the brink of extinction, and still uncertainties about the pinouts!
It's a crazy world.  Makes you doubt your own sanity when stuff like this come up.

It all made sense until the plastic units marked 2N2222A appeared.