Author Topic: My univox super fuzz pedal kit won't work  (Read 9762 times)

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #140 on: April 30, 2021, 10:32:01 PM »
OH. I DIDNT REALIZE THAT

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #141 on: April 30, 2021, 10:41:52 PM »
ok, im just gonna put heat shrinks and electrical tape everywhere to make sure there arent any shorts anywhere

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #142 on: April 30, 2021, 10:45:51 PM »
and the center ground on the footswitch is defo a massive culprit for shorts

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #143 on: May 01, 2021, 12:58:42 AM »
ok so now the true bypass isnt working, it only lets the dry signal through when the pedal is on
« Last Edit: May 01, 2021, 01:05:22 AM by snow123 »

andy-h-h

Re: My univox super fuzz pedal kit won't work
« Reply #144 on: May 01, 2021, 02:30:47 AM »
One of the legs of R1 is in the wrong solder pad, I've marked in purple which leg it is and which hole it needs to go in ( :icon_mrgreen:).

Fix this and report back.





Suggestions:

PROBE IT
Build an audio probe and use it to trace the signal (google it).  If you were using a probe, you would have found out that that the signal was not actually making it to the first transistor (R1 being on the wrong pad), and you would have worked this out quickly.

SIMPLE IS GOOD
Unwire the circuit from the stomp switch - just have the straight inputs and outputs and no other distractions.  Make sure the circuit is working before wiring up stop switches and boxing.  At least this way you start with a working circuit, and if in the process of boxing it up new issues appear, it's not the circuit, it's off-board issues.

BREADBOARD
If you plan on building a few, buy a cheap breadboard and you can use this as a test platform.





snow123

Re: My univox super fuzz pedal kit won't work
« Reply #145 on: May 01, 2021, 05:06:14 AM »
Tbh I've just been using the multimeter to make sure all tracks and joints on the pcb are connected, and everything on the pcb doesn't seem to have any issues so I'm thinking the main issues could be is how the 1/4' jacks, dc jack, and footswitch are wired.

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #146 on: May 01, 2021, 05:13:12 AM »
Also, I should note that when I have the pedal turned on, it sound like half the the effect is going through, making me think that there might me something wrong in between the input/output jacks, pcb and (maybe) footswitch.

andy-h-h

Re: My univox super fuzz pedal kit won't work
« Reply #147 on: May 01, 2021, 05:59:53 AM »
Also, I should note that when I have the pedal turned on, it sound like half the the effect is going through, making me think that there might me something wrong in between the input/output jacks, pcb and (maybe) footswitch.

Which is exactly why you should strip it back to just the circuit and trace the signal with a probe. 

aelling

Re: My univox super fuzz pedal kit won't work
« Reply #148 on: May 01, 2021, 09:23:22 AM »
Tbh I've just been using the multimeter to make sure all tracks and joints on the pcb are connected, and everything on the pcb doesn't seem to have any issues so I'm thinking the main issues could be is how the 1/4' jacks, dc jack, and footswitch are wired.
Test for continuity between tip and sleeve on the in/output jack with you multimeter, if it beeps it's shorting to ground somewhere.

EDIT: Also, the resistor on the footswitch shouldn't be needed, just a wire to the LED.
« Last Edit: May 01, 2021, 09:28:39 AM by aelling »

duck_arse

Re: My univox super fuzz pedal kit won't work
« Reply #149 on: May 01, 2021, 10:50:37 AM »
and all the offboard wiring is grounded
and c12 is grounded
and transistors

I presume we all deserve a couple of beers.. :icon_biggrin: :icon_lol:

or at least a photo of the beers.
"You ain't seen me, right?"

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #150 on: May 01, 2021, 03:22:33 PM »
Tbh I've just been using the multimeter to make sure all tracks and joints on the pcb are connected, and everything on the pcb doesn't seem to have any issues so I'm thinking the main issues could be is how the 1/4' jacks, dc jack, and footswitch are wired.
Test for continuity between tip and sleeve on the in/output jack with you multimeter, if it beeps it's shorting to ground somewhere.

EDIT: Also, the resistor on the footswitch shouldn't be needed, just a wire to the LED.

i got a beep on the output jack.

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #151 on: May 01, 2021, 03:40:08 PM »
Here's the front with the pots and stuff and how I have the footswitch wired if it helps at all

 


aelling

Re: My univox super fuzz pedal kit won't work
« Reply #152 on: May 01, 2021, 04:16:59 PM »
Tbh I've just been using the multimeter to make sure all tracks and joints on the pcb are connected, and everything on the pcb doesn't seem to have any issues so I'm thinking the main issues could be is how the 1/4' jacks, dc jack, and footswitch are wired.
Test for continuity between tip and sleeve on the in/output jack with you multimeter, if it beeps it's shorting to ground somewhere.

EDIT: Also, the resistor on the footswitch shouldn't be needed, just a wire to the LED.

i got a beep on the output jack.
I'm wondering if the tip on the jacks have been touching the walls of the enclosure, they look like they sit awfully close in this photo.
https://postimg.cc/688GVptF

Maybe put a little electrical tape inside so that can't happen.
« Last Edit: May 01, 2021, 04:19:39 PM by aelling »

antonis

Re: My univox super fuzz pedal kit won't work
« Reply #153 on: May 01, 2021, 05:26:15 PM »
i got a beep on the output jack.

But beep is tone and tone is sound.. :icon_wink:

P.S.
You've got beep when probing what points..??
"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #154 on: May 01, 2021, 05:30:31 PM »
tip and sleeve on output jack

antonis

Re: My univox super fuzz pedal kit won't work
« Reply #155 on: May 01, 2021, 05:36:38 PM »
If so, you have a shorted output..

No signal can go further hence no output sound..
"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #156 on: May 01, 2021, 05:45:49 PM »
how do i fix it tho?

aelling

Re: My univox super fuzz pedal kit won't work
« Reply #157 on: May 01, 2021, 05:55:37 PM »
how do i fix it tho?
The enclosure gets grounded by the jacks, so check if the tip of the jacks are touching anywhere on the inside once mounted.

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #158 on: May 01, 2021, 06:58:00 PM »
somehow the 1st lug on the expand knob is grounded to the enclousure

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #159 on: May 01, 2021, 07:19:48 PM »
wtf everything on the input jacks sleeve is grounded to the enclosure