ElectroVibe Issue

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PedalGuy

Member
Hi! I need some help troubleshooting my ElectroVibe; The effect works fine with the jacks not touching the enclosure. As soon as I put them back in though, the effect stops working and I hear the dry guitar signal through my amp. There is no continuity between the tip and the enclosure so I really don't understand what's going on.
Also; when I use the ElectroVibe with my Twin Face it produces a loud whistling LFO effect that sounds like a siren. This only happens on the silicone side, not the germanium side. I can still hear the LFO even with the EV bypassed, though it is less noticeable.
 
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PedalGuy said:
Hi! I need some help troubleshooting my ElectroVibe; The effect works fine with the jacks not touching the enclosure. As soon as I put them back in though, the effect stops working and I hear the dry guitar signal through my amp. There is no continuity between the tip and the enclosure so I really don't understand what's going on.
Also; when I use the ElectroVibe with my Twin Face it produces a loud whistling LFO effect that sounds like a siren. This only happens on the silicone side, not the germanium side. I can still hear the LFO even with the EV bypassed, though it is less noticeable.
Click to expand...
Insulation Tape does not work !!!
 
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music6000 said:
Cut a square piece of Plastic from a used plastic ice cream bowl or lid or credit card, cardboard is a bit too soft for my liking!
when you slide it under the pot, the tits of the solder will keep it in place!
Click to expand...
Done! I'm not sure if I didn't push it back all the way or something else is causing that horrible noise but at least I can hear the wet signal now.

Edit: I've double checked; they are both properly insulated now. The noise is still present.
 
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I mad dual gang pot covers wit a 3D from a file uploaded by another per on this board. I’ll send you a couple, or any other Electrovibe builders.

Dust Covers For Dual Gang Pots?

I'm building the ElectroVibe and am using these pots for the speed controls: https://stompboxparts.com/pots/16mm-dual-gang-potentiometer-smooth-shaft-short-pcb-leg/ What is the thing to do with dust covers for these? I am cutting away some of the wall of the regular ones but it won't cover the...
forum.pedalpcb.com forum.pedalpcb.com
 
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PedalGuy said:
Done! I'm not sure if I didn't push it back all the way or something else is causing that horrible noise but at least I can hear the wet signal now.

Edit: I've double checked; they are both properly insulated now. The noise is still present.
Click to expand...
Does the pedal work as it's suppose to in the enclosure with the IN & OUT jacks not in the Enclosure as it is now???
 
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music6000 said:
Does the pedal work as it's suppose to in the enclosure with the IN & OUT jacks not in the Enclosure as it is now???
Click to expand...
Yes. It works perfectly fine ()whith both jacks in the enclosure as well) though even with volume at 100% the output is still slightly quieter than bypass. I'm not sure if that's normal or another symptom of whatever is causing the noise as well. I did create a thread concerning the noise a while back so I do already have a folder with pictures (obviously outdated) and some audio recordings of the vibe. I used it AFTER a Big Muff and Klon Centaur clone. It doesn't matter as the noise only scales with overall volume (It just means the clip is a little more noisy in general). I'm pretty sure this is what's causing the silicon fuzz noise as well (I've added the fuzz face noise to the folder as well).

PedalGuy said:
Hi! I've recently finished building the ElectroVibe "Uni-Vibe". It sounds wonderful but it produces a high pitched noise (roughly 11.622kHz; wav recorded using Amplitube 5 HiAmp). It's not particularly loud with my master volume at 9 o'clock and channel volume at 3 o'clock on my Custom Hiwatt 50, though it is annoying. Using the Vibe with no other pedals connected and turning my guitar volume all the way up/down had no effect on the severity/pitch of the noise. Any ideas?

Pictures
Click to expand...
 
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PedalGuy said:
Yes. It works perfectly fine ()whith both jacks in the enclosure as well) though even with volume at 100% the output is still slightly quieter than bypass. I'm not sure if that's normal or another symptom of whatever is causing the noise as well. I did create a thread concerning the noise a while back so I do already have a folder with pictures (obviously outdated) and some audio recordings of the vibe. I used it AFTER a Big Muff and Klon Centaur clone. It doesn't matter as the noise only scales with overall volume (It just means the clip is a little more noisy in general). I'm pretty sure this is what's causing the silicon fuzz noise as well (I've added the fuzz face noise to the folder as well).
Click to expand...

It only takes a single resistor change to increase the volume. R4 changed to 2.2M should give you plenty of volume.
 
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Big Monk said:
It only takes a single resistor change to increase the volume. R4 changed to 2.2M should give you plenty of volume.
Click to expand...
So it's a feature not a bug? BTW I was just thinking; could this be a twin face issue? The silicone side of my twin face is significantly noisier than the germanium side and starts to "scream"/whistle with the fuzz pot maxed out.
Edit: I was talking about that siren effect; the high pitched vibe noise is always present (as stated above).
 
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PedalGuy said:
So it's a feature not a bug? BTW I was just thinking; could this be a twin face issue? The silicone side of my twin face is significantly noisier than the germanium side and starts to "scream"/whistle with the fuzz pot maxed out.
Edit: I was talking about that siren effect; the high pitched vibe noise is always present (as stated above).
Click to expand...

Unity Volume (or lack thereof) was/is a known issue of the vintage Univibe.

The screaming/siren noise in the Si Fuzz Face might be oscillation.
 
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Big Monk said:
Unity Volume (or lack thereof) was/is a known issue of the vintage Univibe.

The screaming/siren noise in the Si Fuzz Face might be oscillation.
Click to expand...
Possibly. I have also tried using an ILC7660S instead TC1044S but that made everything much worse (and also changed the pitch of the noise). I also used some random BC108s for this build. Maybe that's causing the silicon fuzz issues. As for the vibe... No idea what's causing that noise.
 
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Did you measure the BC108s? If they were in a high gain bucket (BC108B/C), oscillation is the likely issue.

Try tacking in a 100-220 pF cap across the feedback resistor (R8) on the Si sode and see if that eliminates it.

78AD0D29-3869-4450-A11F-F663900628D5.jpeg

As for the Vibe noise, it sounds like you are getting oscillation with the Si Fuzz Face engaged and normal bleed through, possibly because of a non-isolated power supply when disengaged.
 
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Big Monk said:
Did you measure the BC108s? If they were in a high gain bucket (BC108B/C), oscillation is the likely issue.

Try tacking in a 100-220 pF cap across the feedback resistor (R8) on the Si sode and see if that eliminates it.

View attachment 26612

As for the Vibe noise, it sounds like you are getting oscillation with the Si Fuzz Face engaged and normal bleed through, possibly because of a non-isolated power supply when disengaged.
Click to expand...
I ordered some new transistors anyway so I'm just gonna wait for those to arrive first. I have an isolated power supply (Truetone 1Spot Pro). I'll upload another clip of just the Vibe without any other pedals active; it's even more noisy/noticeable without all the other noise. I don't think it's the power supply.
Edit: Done! Same folder.
 
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Big Monk said:
Post some sound clips so we can hear the noise.


EDIT: Just saw them above. I’m not hearing anything wrong.
Click to expand...
Maybe turn the volume up? Or perhaps you are too old ;) Anyway... I have just used an audio probe and LDR2 is producing a really strange modulation effect/noise which sounds exactly like the effect I'm hearing with my silicon fuzz connected.

Edit: It is very subtle but there is a very high pitched noise in the background (following the LFO I believe). You might wanna use headphones I will upload another EQed version to make it louder/more audible.
 
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PedalGuy said:
Maybe turn the volume up? Or perhaps you are too old ;) Anyway... I have just used an audio probe and LDR2 is producing a really strange modulation effect/noise which sounds exactly like the effect I'm hearing with my silicon fuzz connected.
Click to expand...

In the "vibenoise" clip, is there anything else connected?

What is the difference in configuration between "vibenoise" and "vibesolo"?
 
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