Author Topic: My univox super fuzz pedal kit won't work  (Read 9904 times)

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #200 on: May 04, 2021, 12:44:22 PM »
i think i want to keep working on this lol

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #201 on: May 04, 2021, 12:45:13 PM »
so if i cant get anything when probing a certain part, does that mean somethings wrong?

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #202 on: May 04, 2021, 12:46:22 PM »
i should have also mentioned that i can get my dry signal through when probing about 5 out of the 9 lugs on the footswitch

eh la bas ma

Re: My univox super fuzz pedal kit won't work
« Reply #203 on: May 04, 2021, 01:05:42 PM »
I am not very experienced with following a signal with a probe.

I think the purpose of the exercise is to follow the signal on the circuit,  untill you find the spot where there is a problem (meaning the signal stops going forward). In order to do that, I think we have to start from the input of the pedal, all the way to the output, following the schematics carefully. The document you have to use is the one which has been kindly provided by Antonis on reply #91 page 5 :

http://generalguitargadgets.com/pdf/ggg_superfuzz_sc.pdf

I recommend to use an old amplifier at low volume to probe the signal, because there will be a lot of noises. Loud popping noises aren't good for either your ears and your amp's speakers.
« Last Edit: May 04, 2021, 01:11:44 PM by eh la bas ma »
"unity-gain non-inverting stage", "ground leg","post-pick moments", I love this colorful forum.

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #204 on: May 04, 2021, 01:44:27 PM »
well i dont have any old or cheap small amps. the only other amp i have in my house is my dads old 10" rickenbacker combo amp.

antonis

Re: My univox super fuzz pedal kit won't work
« Reply #205 on: May 04, 2021, 02:02:00 PM »
Signal path (with relative amplitudes & phase) for audio probing..  :icon_wink:


"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 #206 on: May 04, 2021, 02:20:49 PM »
btw im building the modded one with the clipping trimpot and tone knob instead of tone switch so im pretty sure this is the schematic i need:

« Last Edit: May 04, 2021, 02:24:48 PM by snow123 »

antonis

Re: My univox super fuzz pedal kit won't work
« Reply #207 on: May 04, 2021, 03:04:07 PM »
It makes no difference for signal tracing.. :icon_wink:
"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 #208 on: May 04, 2021, 05:04:36 PM »
wait are things that are grounded not supposed make any noise when probed?

antonis

Re: My univox super fuzz pedal kit won't work
« Reply #209 on: May 04, 2021, 05:33:30 PM »
I've to admit I'm not sure about "grounded" items anymore..  8)

One side DC grounded resistive items, like R33, R3, R5, R7 and so, are also AC grounded there so there should be "some" voltage difference on their other side..
One side DC grounded reactive items, like C2, C10 & C13 are also AC grounded on their other side so there shouldn't be any voltage difference (almost) between their sides..

That said, there should be audio signal between R3 upper leg & GND but no signal between C10 possitive leg and GND.. :icon_wink:
"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 #210 on: May 04, 2021, 05:40:30 PM »
grounded as in connected to ground
« Last Edit: May 04, 2021, 06:28:08 PM by snow123 »

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #211 on: May 04, 2021, 11:36:05 PM »
well i tried improving the solder joints and everything is making popping noises.

antonis

Re: My univox super fuzz pedal kit won't work
« Reply #212 on: May 05, 2021, 03:29:11 AM »
Didi you resolder PCB with  power on..??
"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..

bluebunny

Re: My univox super fuzz pedal kit won't work
« Reply #213 on: May 05, 2021, 03:30:46 AM »
are things that are grounded not supposed make any noise when probed?

No.  The other end of your probe is also ground (I hope), so you can't possibly expect any voltage difference between the probe ends, so no sound.
  • SUPPORTER
Ohm's Law - much like Coles Law, but with less cabbage...

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #214 on: May 05, 2021, 12:49:13 PM »
Didi you resolder PCB with  power on..??
no

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #215 on: May 05, 2021, 03:10:17 PM »
Here's my soldering btw


snow123

Re: My univox super fuzz pedal kit won't work
« Reply #216 on: May 05, 2021, 03:15:19 PM »
i did fill in all of the empty holes with some solder to make sure everything there was connected

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #217 on: May 05, 2021, 03:24:32 PM »
omg im an idiot. i just realized 2 of the legs on q2 are soldered together LMAO

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #218 on: May 05, 2021, 03:52:08 PM »
lol the poppings been fixed

snow123

Re: My univox super fuzz pedal kit won't work
« Reply #219 on: May 05, 2021, 04:30:01 PM »
i made a diagram thing of things that did and did not make noise when probed.
green = makes noise when probed
red = does not make noise when probed or lets through a very quiet or weak signal.