Author Topic: Small Bear Breadboard Project  (Read 414 times)

audiobalm

Small Bear Breadboard Project
« on: January 15, 2021, 12:28:06 PM »
Hi All,

I'm trying to follow the step by step instructions on the following website to build a Silicon NPN Fuzz Face

http://diy.smallbearelec.com/HowTos/BreadboardSiFF/BreadboardSiFF.htm

I'm built it three times, and can't seem to get any sound whatsoever out of it except some crackle if I touch things, and a buzz if I remove the ground. I've tested the components and they seem fine, can anyone see anything in this layout that might indicate a fault? (Input will go to D1 and output D18, not currently connected)

Any thoughts? Many thanks!

DP




audiobalm

Re: Small Bear Breadboard Project
« Reply #1 on: January 15, 2021, 12:35:58 PM »
Here's another angle on attempt II


blackieNYC

Re: Small Bear Breadboard Project
« Reply #2 on: January 15, 2021, 02:36:27 PM »
Is nothing connected to that first transistor leg at the far left?
I just see two jumpers to nowhere
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antonis

Re: Small Bear Breadboard Project
« Reply #3 on: January 15, 2021, 02:52:17 PM »
What blackie said.. :icon_wink:

Left jumper should go to GND and right jumper to VOL pot lug 1..
(the later isn't needed due to Vol pot lug 1 grounded via blue flying jumper but the former IS needed for Q1 Emitter grounding..)

"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..

audiobalm

Re: Small Bear Breadboard Project
« Reply #4 on: January 15, 2021, 03:39:51 PM »
Well that certainly changed things!! Thanks Folks.. Much appreciated!

After looking at it for 10 hours I just couldn't tell what was missing. Thanks for spotting it.

Yeah, there were a couple ways to build this and the right jumper was to facilitate the blue flying lead originally.

Thanks again. Quick Question while we're at it:

This is set up for Silicon NPN, if I want to switch it to germanium PNP, I switch around the polarity of the Electrolytic Caps and the Battery is that correct?

antonis

Re: Small Bear Breadboard Project
« Reply #5 on: January 15, 2021, 03:56:45 PM »
Quick answer is yes..!!  :icon_wink:
(beware of it in a daisy chain..)


"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..

iainpunk

Re: Small Bear Breadboard Project
« Reply #6 on: January 15, 2021, 04:52:02 PM »
Quote
(beware of it in a daisy chain..)
i'd say that its a sub-par practice to daisy chain fuzzes period. fuzz faces and tone benders seem to sound smoother with batteries and the current consumption is generally low enough to not drain your 9v's like other pedals do.

cheers, Iain
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Big Monk

Re: Small Bear Breadboard Project
« Reply #7 on: January 15, 2021, 05:54:50 PM »
Quote
(beware of it in a daisy chain..)
i'd say that its a sub-par practice to daisy chain fuzzes period. fuzz faces and tone benders seem to sound smoother with batteries and the current consumption is generally low enough to not drain your 9v's like other pedals do.

cheers, Iain

Iím sure, like most things in tone, that this is a subjective observation. Iíve never heard a compelling argument for batteries that was not overturned by my own listening tests.

Iíve run my current Tonebender with and without batteries and to me there was no discernible difference.

I do have a DC jack mountable charge pump and some OC75s on the way so testing will ensue!
ďWe are what we repeatedly do. Excellence, therefore, is not an act, but a habit.Ē Aristotle

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audiobalm

Re: Small Bear Breadboard Project
« Reply #8 on: January 16, 2021, 09:24:54 AM »
Thanks for all the comments,

This doesn't have a jack for a power supply so it's batteries all the way I'm afraid.

I don't know where to fall on the Battery vs. Power supply thing but here's an interesting read from "Tone Manual" by Dave Hunter discussing Alkaline vs. Carbon Zinc with some wisdom from Zachary Vex. Whether you can hear this difference I suppose is still subjective, but the science says there's a difference.


POTL

Re: Small Bear Breadboard Project
« Reply #9 on: January 16, 2021, 10:14:03 AM »
funny.
4-5 years ago Fuzz Face was my first project in my life, I also collected it on a solderless breadboard and using the same link. Lol
I made several tries but Fuzz Face didn't work.
 I thought that the problem was in the board / accessories or just diy was not milking me and was ready to give up, but I went to collect Big Muff and it worked right away.
I assembled the first stage, but there was only pure amplification, no fuzz or distortion, this surprised me a lot and since then I started studying circuits.
If this is your first build, then congratulations!
my advice, now study it, change the components and understand how they affect the sound, this will help you a lot in the future.

garcho

Re: Small Bear Breadboard Project
« Reply #10 on: January 16, 2021, 11:11:23 AM »
Quote
Whether you can hear this difference I suppose is still subjective, but the science says there's a difference.

I know what you mean, but thatís not completely true. Whether or not you can hear a difference is very much provable with blind AB testing. This is why talking about audio is like dancing about architecture. Itís also why actual audio evidence is rarely (never?) presented along with those types of statements. Can ďscienceĒ prove there is a difference? If you canít perceive it with your ears, than it doesnít matter. I think a real, professional, published scientist would go the blind AB listening test route, as opposed to the esoteric data plot argument. Iím only referring to sound, not EE concerns (canít hear super sonic oscillations but they sure can cause problems).

Congrats on getting working!
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audiobalm

Re: Small Bear Breadboard Project
« Reply #11 on: January 20, 2021, 11:54:40 AM »
Sure, I suppose what I mean is someone who is new to a certain kind of sound might not detect subtle variations in fuzz between a carbon zinc or alkaline battery as you canít step into the same guitar playing twice (yes a looper would work, but then youíre definitely too concerned with A/Bing and not guitar playing)

Same as someone who might not detect different ďnotesĒ in a different wines at the beginning.

Thatís more what I meant.