Help with LM311 Comparator Fuzz

[deadmandance]

So, I'm trying to build this nice gated fuzz from Fredrik, but going nowhere.

I breadboarded it and worked just fine, but when using the Vero Layout, can't get it to produce any sound.
https://www.parasitstudio.se/building-blog/lm311-comparator-fuzz

Really can't understad what is wrong, any clues?

[antonis]

First of all, Welcome..

Vero layout used is one of those included in https://www.parasitstudio.se/uploads/2/4/4/9/2449159/lm311_fuzz_pcb.pdf..??

[deadmandance]

Hey Antonis, thanks for the Welcome!

No, I used this one

https://www.parasitstudio.se/uploads/2/4/4/9/2449159/lm311_fuzz.gif

It's on the same page, i think

[antonis]

Could you post some pics of your build..??

I might be some "silly" issue, like mirroring vero..

[deadmandance]

Here they are!

I noticed the vero got a big 1m resistor going from input to ground. Any reason you could think of?

[antonis]

Just a pull-down (anti-pop) resistor..
http://www.muzique.com/lab/pop.htm

Was IC correctly oriented..??
(according to vero, pin 1 should lay right down 47μF electro cap..)

P.S.
Post a complete schematic/diagram of your particular build 'cause there are some discrepancies between vero layout & your build, like 2^nd pot & 2^nd switch (DPDT)

[ElectricDruid]

Welcome!

And...buy some smaller resistors!!

[duck_arse]

also welcome, also, no ground wire on the photo-left jack?

[antonis]

Agree with Stephen's good builder practice but I presume it isn't part of present non-working issue..

[deadmandance]

Hey guys!

After some swearing and thinkering, the culprit was a bad socket. The leg that suppoused to be the output was faulty. Replaced the socket, everything goings smoth and fuzzy right now; 

And yes, I REALLY nedd smaller resistors hahahah was my first build, didn't think there was gonna be much difference between them in size. Now I know

[deadmandance]

Just a pull-down (anti-pop) resistor..
http://www.muzique.com/lab/pop.htm

Was IC correctly oriented..??
(according to vero, pin 1 should lay right down 47μF electro cap..)

P.S.
Post a complete schematic/diagram of your particular build 'cause there are some discrepancies between vero layout & your build, like 2^nd pot & 2^nd switch (DPDT)

Just to answer this, the second pot is a BMP tonestack. At the point of the pictures I didn't installed it yet. Now is up and runing, the DPDT just takes it off the circuit, if one finds best.

[antonis]

Also just for our info..

In which particular place of the circuit is BMP tonestack placed..??

[deadmandance]

Sorry for the late reply! the Tonestack is after the volume pot, before the output!