Fuzz Face Circuit Analysis
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- Опубліковано 22 сер 2024
- In this video I take a look at a classic guitar effects pedal circuit - the fuzz face. I will look at the schematic and explain how the circuit works and how the signal flows through each component. I will also discuss how you can tweak values to find the right voice for your tastes and include my favorite mods. Enjoy!
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This is a dad trying to maintain his sanity with guitar electronics.
This may be the most accurate thing I've ever heard, lol!
I am a dad, learning how to maintain my sanity with guitar electronics by watching this video
🤣🤣🤣
Dada , well in minor , then you remember what resistor of Q1,or emiter follower. Super cool
Finally someone who explains basic simple things in clear language.❤
Thank you so much!!
Dads rule. I'm thankful you found time to follow your passion and educate others like me. Thanks for the info
Waiting for your next video, "Crybaby Circuit Analysis, With Actual Crying Baby"...
...just kidding. Great info. Thanks!
Just found your channel through this video. Wanted to say I truly enjoyed both the thorough breakdown of the FF as well as the life happening in the background! Godspeed, my man! Looking forward to watching the rest of your catalog.
Thanks, glad to have you!
I have kids, you are a brave man hitting the record button with the little ones around :D
Id go 50k on the bias pot for Q2 (plus the minimum resistor in series), I've found some transistors (leaky ones) tend to require more voltage on the collector to saturate. Make it a 'bias' control on the front of the pedal so you don't have to worry about temperature shifting on the transistors as well. Good video mate!
DIY Guitar Pedals - Haha yeah, I have accepted that all my videos will likely have a child cameo at this stage.
Good thought regarding the bias pot. If the pot gets too big I sometimes find it can be hard to dial in the grey areas. But 50k should be great.
Thanks for the feedback. I'm a big fan of your videos!
Great vid and feedback. When you say front of the pedal, where on the circuit does that mean? I'm a newbie of guitar fx front but understand schematics.
Oi mate what you doin here lol...
What pot would you recommend for lowering the output of a noisy child?
@@KleyDeJong I tried a 25k pot. As the resistance goes up it starves voltage to the point that the pedal isn't working at all 50k would be worse, no? 10k is perfect
7:47 props to your kids for that grimy mic distortion effect, that was awesome, it must run in the family :D
I have built a double transistors (piggyback) with
100k pot on+9v as a Bias control
Input I built a custom 1958 value amp tone stack using what capacitors I had. 100uf +70uf(?) In parallel with 47if and 17uf in parallel.
Gain control to emitter
Output 47uf gives mids.
The tone stack and other mods make it a versatile high gain pedal. More HM2 than straight Fuzz and with the 100k pot on the emitter it goes from almost clean overdrive to nasty mid/treble boost fuzz.
Thanks for the video, I really enjoyed it. Cheers
Did you wrapped the baby in bubble wrap man? :-)
lol
Its fitting that you used a tonebender mk 1.5 schematic to explain the fuzz face. Dallas Arbiter designed the Fuzz Face "based" on the tb 1.5 (it's the same circuit).
Instead of a switch, you can put a pot in every resistor spot where noon is stock value so you got cut and boost. I'm sourcing parts to do just that... Add a diode in parallel somewhere.. just make sure values are within tolerance. And if you go with a higher rated component instead of the minimum allowed voltage you can add to the mojo. It hold more magnetic field and takes a big longer to fully discharge (even tho it's super fast and happens almost instantly, it slows the discharge down slightly. It DRAINS not empties but on nano second levels)
Awesome breakdown of the fuzz face. I'm building my own, gonna do all the old GE styles of dirt pedals but add a high voltage tube along with the GE black glass/metal can tubes... Maybe some sun mini tubes... 12ax7 preamp pedals are my jamb so Doing ALOT of research. Watched at least 100 hours of just videos about tubes and tube containing products of all kinds and the same in just The old RCA bibles.. transistors maybe got an entire years worth of time, I'm guessing 1000 probably over the last couple years.. Lots of old amp footage... Lots of crazy ideas to try out. People say the darndest stuff In videos and it leads to big things... I might be able to make a successful FX company out of all the crazy stuff I thought up.
Can you do a half hour long video on Tonebenders.... Start with the first one and spend a little time talk about what that last transistor does... Please mention big muff. It's a Tonebender based circuit but must be at least mentioned. With a couple mods, the big muff can do fuzz face but more refined I fell since its got 2 extra tranny's.
Make Q2 a Darlington and adjust caps/resistors to bias the increase gain. That config should be Considered the FUZZ FACE 1.5 since it's technically 3 tranny's but like backwards of the TBs circuits!!
Love it when a demo gets the gears rolling. Thanks for the demo. Greatly appreciate you man! Be safe. Later
Patrick hay. Klay this man it's man of meny faces,in all kind good way. Good, teacher, father,diy-er and wery modest. This time of people who are sharing and storage and go over again to
Made samthink for students or complete stranger who asks normal! Perfect for learn more!! Sorry about long.🇭🇷 Pozdrav
Klay , man voice of a your angel 😇🙏 ( ha, ha), didn't expect in a video of a Fuzz F. Topic but your method , man you are great father and electronic engineer
Teacher! Please hello to your angel and all family members,🙏❤️☮️🎸🌞 Salute from 🇭🇷 Croatia of Ana.😺😸😽😽👪.
a great video explaining the fuzz face, kind of hilarious you got marauded by an army of tiny children halfway.
@Kley De Jong, i was wanting to tell you think you my fuzz face sounds amazing the gain is perfect . its everything i was hoping for, i could not of done it with out your video helping me to understand the circuit a bit better. i even decided to make a Univox Super Fuzz next to my fuzz face on my bread board i got it working but i still have work to get the octave to pop out a bit more and the gain on my super is a little on the low side.
Awesome video man. Thank you so much!
Covers the main mods on a FF.
I'ld like to add one remark about the input cap. Just as the output cap increases or decreases bass through, the input cap does just that. The percieved mids are what remains. It is not boosting mids though. Passive components only take away, they "shave off". Of course with a high gain device, enough signal remains. Still, it is interesting to mention that a very very tiny cap value will give a very thin shrill signal since it takes away so much it even takes away the mids as well. At 0.05µf one will have a treble booster style of tone shaping and will have nothing of muddy flabby fuzziness whatsoever. Lower than that is way beyond pleasant imho. Volume roll off effects on the other hand will accentuate what is done in the cap which means low guitar volume will have a thin sound. Those "flubby to clean" guitar volume effects are so connected to a fuzz face that I would not go low on the input cap.
He kept a serious face in the entire time. Didn’t raise his voice. Pretty great to see that from a father
Credits to mom for that rescue operation @14:32!! Thanks for sharing and summarizing all your tips for tweaking this classic circuit!!!
Easy device to remember bass/cap relation: the bigger the #, the more 'oof' (phonetically pronouncing the microfarad abbr.)
Want more bass? Up the 'oof'!
I know it's not always microfarads...... but you get it.
Very cute with the baby... This is the best video on fuzz I have seen to date. Thank you!
Thank you!
Fuzzy Baby effect.
thank you for these video, im just getting into this hobby and ive found your videos a huge help and i just wanted to tell you thank you. im planning on building a couple fuzz pedals soon one of them will be stock NOS parts the other will be modern components full of these mods your talking about in your videos.
Fantastic job, all around!
Thanks so much for this video it’s brilliant. I’ve just started building pedals and I made a fuzz face and a dam meathead clone. I now want to mod the meathead similar to what you suggest with the bias pot. Thanks again Klay brilliant work!
Actually, it's a Tonebender but the 2 transistor version is called fuzz face. It doesn't have the 3rd tranny interaction so it responds different enough to warrent it's own sub genre. They were all basically invented by the same 3 or 4 people working together at the same in the same room. Fuzz face came out first actually but was originally the 3 tranny version known as Tonebender. I believe I read it's actually the circuit that broke In the console. Just without 99.9999% of the original console boards parts.
The TB 1.5 is a special unit. It actually predates the mk1 TB. It was found by a curious player and it's said it wasn't a FF but it wasn't a TB so the 2 tranny 1.5 is it's own special thing. 1 company made all of them until the smiley face came out, which is a stripped down Tonebender, enough so that it gets it's own category under dirt pedals.
Get longer taper pots with extra turn radius, change the pot taper, try all of them, install a left handed version of each style. Install them backwards and go up 75-250 higher pot values if you wanna pull new tones out a Fuzz Face and get the circuit to do new things. Put an inductor cap in there. A cap will work as a resistor as well. Some old harmonic Percolators came with an input resistor and no cap or cap after. Mostly just a resistor to the tranny. Such a wonder circuit... Both of them!! Love the kid being a kid in the back ground.... Don't apologize for it.... Ever!!
Thanks for this. Gonna wire up my first fuzz clone kit but I wanted to add some flair, I think I will use a couple of your ideas.
Hi, New sub greetings from Costa Rica
What type of pot would you use on the input cap to blend the caps? Also would you use the same for the output cap? Thanks
Sorted my pedal had the bypass switch was 90 degrees out , sounds great
Could you please make an analysis video of the MKII Tonebender?
Love this video for getting ideas for making mods
I’ve seen this video in the past. It’s still hilarious.
Thank you!
I have a hard time understanding how the potentiometers are wired when they are in the line going straight to ground, as the, "Attack" one is in this scheme. It would seem to me there is nowhere or nothing to wire to the output of the pot..? Could someone help me?
Hi, did you ever breadboard a Tonebebder. Thank you for all your great educational videos!!!
That is a mu (Greek letter) not a u, of course.
you are both correct. It is the greek letter mu that is the SI symbol for micro
who gave the kids the plastic bags? :D
great video thank you!
great analysis, this helps me tremendously, thanks a lot :)
Dude, your tone is safe. You are so good at this. Im like so impressed. Amazed and snappy subscription!
good for me thank you upload
Very helpful video. Thanks!
Great video thanks man!
i wonder why he didn't edit out all the children's play noise. and also, tweak the audio setting
fun with kley,kids,and klones! lol
Haha, that may be an even more accurate title!
Great video. Does the -9v simply mean swapping over you positive and negative wires from your psu?
Yes! You also have to re orient polarized capacitors.
@@KleyDeJong thanks Kley, I've got it right then. I've breadboarded an FF that I'm working on right now, but I'm getting voltages around 8-9v on all the pins of Q1, and I can't work out whether this is right or wrong. The effect is working. On the Electrosmash analysis it says the voltages should be all very low so I'm wondering where the issue is.
What value pot should be used for blending the input capacitors. i used a 500k and it lost volume at 12 o clock when both were blended equally.
That might be because the equilibrium of two matched out of phase signals is acheived? Just guessing... My soundcard malfunctioned once, and that was what happened when I tried center instead of balancing to either left, or right... If 2 signals are perfectly matched and out of phase, they cancel and dont excite the speaker cone. The issue with the sound card was a ground fault, which I think changed the bias of one channel, and phase. Maybe if you can change the bias or phase of one, or alter one of the signals with a HPF or LPF before blending back together, your signals wont be a perfect match... and you wont get the dead spot?
Remember this is a guess! hahaha
Hi. thnks for you explanaition. I do have a question. Changing the of the first capacitor will change the amount of bass frequencies, correct? With a lower values I'll have less bass frequencies? My question is: This will lower the overall bass freqs of the pedal or will just cut some of the muddy low end? will the high freqs stay untouched or will be affected as well? i'm asking because i like my fuzz with the volume down on guitar but when i turn my guitar vol upp to 10 i get that wall of fuzz and et lost in the mix. I would like to get rid of some of that low end. Thanks!
i'm looking at this to help with a science fair project. what if i replaced the pots with photoresistors? imma try that. ngl that pedal would be a trainwreck to use
the blend pot on the input sounds awesome - would you then take the two outs from the caps on either side and solder them both directly to the base of Q1?
Yessir
@@KleyDeJong awesome thank you! how wide of a range do you think might work in this configuration? Like if I used a 3.3 on one side and a .047 on the other would it give a nice wide sweep?
thanx for sharing.. title would be..how to hush children .. Greetingsfrom Peru.
i didnt get the circuit analysis very well it could be more detailed for newbies like me.
Have you tried a 20k c or a curve? I’ve found that some lfo circuits respond better for their rate on a log or anti log so that may help that bias
If using a pot to blend between the input caps, what level would you suggest for the pot? Does it even matter?
I think I've always just used a 500k linear taper pot because that's what I've had on hand. In theory I think if you use a small value pot like 1k then you might have too low resistance to 'shut off' one of the routes entirely. Signal comes into the wiper. It can either travel to one of the two outer terminals on the pot. Set the pot to 0 or 10. The signal sees the full value of the resistance of the pot in one direction and nearly zero resistance in the other direction. It will always choose the path of least resistance. If the value of the pot is 1 million ohms the choice is extremely obvious. If the pot is 1 thousand ohms it could perhaps become a little less clear and you maybe would get some bleed through the resistance.
The taper of the pot would be more important. A linear taper pot would ensure that 5 is about a 50/50 split, so that is what I'd choose.
@@KleyDeJong I've built two of these now with a 500K linear pot and as someone else stated there's a significant volume drop when it's blended 50/50. You haven't experienced this?
did you use different collector Resistor for Q1 because you are not using the original AC128 germanium Transistor ?
Do you know some good literature to understand these circuits and how they work?
Hi , what happen of you change the 100k in the feedback to lower or higher value , any experience you can share..
Just made up a fuzz face kit pedal bit disappointed won’t work just hums when connected 🙁
Take the wiring diagram and a sharpie and check every connection. If it is correct cross it out.
@@KleyDeJong thank you for replying I'll give everything a check over. I just feel a little despondent really took my time with this didn't rush it followed everything to the letter. So hopefully fingers crossed I'll find the problem.
Why is the polarity of the 5 uF cap this way. Must it not be the other way around, plus at the base?
This is a PNP circuit, so the polarized components are 'backwards' compared to normal.
@@KleyDeJong Yes I understand, but the the base voltage will be ca +9-Ube(app 0,3V) =+8,7 Volts potential at the right side of the cap.
Great video! I have a question. If you add the SPDT with the capacitors, you can remove the 5uf input capacitor?
Yes, whatever input caps you put in replace the 5 uf.
Thanks for the answer! :D
Hi, Im putting together a arbiter 1st issue board "FUZZFACE" Im using all the standard resistors Can i put a 50k trimmer under the board from the 8.2 resistor to the collector of the transistor to adjust the voltage. my goal is to have the top of the board look unmodified. will that trimmer work out. please help me with this thanks
That would work fine. I might recommend a 25k trimmer so you can better fine tune adjust. Or something like a 5k resistor in series with a 10k trimmer. A 50k trimmer will have a pretty large adjustment, and much of it may be unusable.
Thank you so much, I've been being held up trying to figure this out, Forgive me for this But... what do you mean in Series? How would that be set up. Would i do that in the same manner i would have done with my original idea? One would figure i know. But im just putting resistors where i knew they went and don't know a hole bunch more.
Baby was not impressed with the variable resistor mod. 😊
Kool!
Why does lowering the uF capacitor cut the bass?
With filters, frequency is affected by the relationship of adjacent resistors and capacitors: Frequency = 1/(2πRC) , if you had say a 10k resistor with a 1 nano F cap the frequency cut-off would be 15kHz, change the cap to a 1 micro F cap and the cut off is 15 Hz. Depending on how the cap and resistor are positioned you will either create a high pass or low cut. The resistor could also be modified to adjust the frequency being affected. That's a bit oversimplified but it is a starting point. W2aew on UA-cam is a fantastic resource for electronics theory and practice if you are looking for someone who really knows their stuff.
Is the kid OK Kley? She didn't cut her tongue?
I only have +9v, what should I do?
Scott Paige you can use BC108/BC109 silicon transistors.
Swap ground with +9V and -9V with ground
Does the cap on the fuzz pot have to be a 25uf? I have all the components but that one!
In the Fuzz Face the value is 22uf
Think of the children sound as distortion
where is the switch?
You can use whatever bypass you prefer. A generic 3pdt true bypass would work well.
@@KleyDeJong are all the lugs diagram the same? I dont know where to wire the inout and output and the ground to the switch. It seems there is a lot of different diagram for the switch
That was hilarious with the kid . Good info too.
Edit, dude.
KLEY DE JONG, Any kinds of modifications I can do to to a fuzz face pedal to get a variety and a bunch of different kinds of glassy tones?
Does SRV guitar sound he is playing in a metal can?
ua-cam.com/video/AGPx-ekqZEo/v-deo.html
I'm not sure when turning down the volume pot on the guitar (NO treble bleed circuit since SRV never added one ) it changes the impedance of the guitars output impedance to the Fuzz pedals input impedance and this is what is cause this Texas Glassy metallic tinny resonance SRV tone. So it can be an impedance mismatching or impedance degradation that is cause the fuzz pedal to be a "specialized frequency EQ pedal" and not a fuzz pedal.
Have you compared the schematics from the stock 60's fuzz face and dunlop fuzz face pedals against the Cesar Diaz square face pedal to see why it only happens when using the Cesar Diaz square face pedal and "does not" happen using a stock 60's fuzz face or dunlop fuzz face pedal.
When I turn my strats guitar volume down on a stock 60's fuzz face or dunlop fuzz face pedals it only will give a clean hendrix the wind cries mary clean tone or little wing clean tone. It "does not" give that Texas glassy metallic tinny resonance SRV tone
Here is a youtube video of a guy using a Analog Mans Sunface pedal with his strat volume turned down ( no treble bleed circuit added in ) and its creating that Texas Glassy metallic tinny resonance SRV tone.
The EE designer question is to narrow down what really is causing a fuzz pedal to create a Texas Glassy metallic tinny resonance SRV tone
1.) is it the fuzz pedal input impedance?
2.) is it the transistor types and part numbers?
3.) is it the front end capacitor values and resistor values?
4.) Or what really is it?
ua-cam.com/video/C6LEjf3S8tY/v-deo.html
Great video, +1 for screaming children
I am confused because I never see pots on these schematics, but... fuzz faces (and most pedals) have pots
Pots look like resistors with an extra line in the middle of the squiggly part.
Can you wait to when the kids are sleeping? It's a shit to learn somenthing with this mess...
You can go and learn it by yourself, or you could just be thankful someone took their time to explain this for free.
You're "Kid-ding" me, Right??? I'd try this again without the background distraction.
Had to turn it off... should have edited all of that nonsense out. Kids are great though.
This is by far the biggest train wreck of a video I have ever wasted my time on.