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Small signal diodes and PN junctions such as emitter-base of BJT have Vf (forward voltage) drop of 0.6 to 0.7V depending on current and temperature. You incorrectly said "point 0 7" volts for the 914s which I interpret as 0.07V.

I just am so grateful to you, I feel that I have to expand on my prior compliment. I mean it's just so concise and you really helped me understand it myself. You are such a key to the mind, so awesome, thank you thank you thaaaaaank you, I bet everyone watching this thinks the same

U r so awesome

should there be a dc path for bias voltage to ground? also, why are you calling them common collector amplifiers if it is emitter that's grounded?

Great video!

There are several ways to get different _personality._ You can replace LM308 with LM301 or LM741 or CA3130. They are pin compatible with LM308. You can miss-use various components for D1 & D2 such as IR-LEDs or 2N5457s (G as anode, D-S as cathode) or 2N3904s (B as anode, C/E as cathode) or 2N7000s. Have yourself.

I'mma make a laser distortion pedal. that way, not only can you distort audio, but you can also permanently distort your vision :D

If voltage is entirely relative, then why is the power scheme inverted? xD Is it just out of convention? It would be exactly the same thing... if you changed the -9v to ground, and ground to +9v??? This was always weird to me. Or would it actually matter?

Point oh six volts is written .06v

Brother would you be interested in working on a pedal with me ! really need some help with a project I think can be legendary

Hey I opened my Rat 2 Proco and found one of the resisters burnt. It’s either the R10 or R11 or R12. Im a lil confused as this is my first time with repair. I found a similar schematic online but it has a different ohm value for the R10. It’s listed as R1 100ohm. Another difference I found was instead of the 1N4002 diode it’s using 1N4001. Remaning are the exact same. Should I replace it with 100ohm instead of 47?

Nice video! Would love yo see you analyze Fuzz Factory by Zvex. None of my teachers could figure out what the hell he was doing in that circuit 😂 Had three of them standing infront of the whiteboard, with the schematic drawn on it, scratching their heads.

Hey Rey, I just found your channel. Very good schematic videos, I'm still checking everything out. Keep posting, I would love to see you talk about different audio electronics schematics such as pedals, effects, pre amps, etc.

i liked, you make stuff now...

subscribed!

all program changes are deleted after restart the keystep :( bug or feature? i tried to save it as pattern but still not saved

all program changes are deleted after restart the keystep :( bug or feature? i tried to save it as pattern but still not saved

As an electronics repair tech being in the business ever since school, i can't say that having positive ground and having mostly pnp transistors in the circuit is rare at all..there are millions of products been made polarized this way during from the early period of transistors to early seventies.. it's just not common these days with silicon semicomductors! ..also one must mention that due to historical reasons we nowadays have stuff kinda reversed..simplified the electron flow goes from negative to positive..😅

I learned a lot from this that would be hard to read through, keep making these.

Great explanation. Thanks for sharing

1. 3db drop is 50%. 2. Think of the diodes on the first opamp as bleeders

Hi guys, what could be the cause of the self-oscillation problem in Big Muff? I tried different capacitors, cleaned everything, tried different transistors, but I still have oscillation, help!

If Bart Simpson was a professor. "Whoah maan yeah! This is a capacitor...."

J fet also gives a more rounded less harsh tone from the rest of the silicon.

Thanks for this! 👍

thank you!

Thank you for this simple explanation! Could you just use 1 non-inverting amp, instead of 2 inverting ones? Or is there a specific reason to use inverting amps?

Great, great explanation! funny and to the point. Exactly what I needed. Thaaaaannnnks!

is it working to put a higher poti in the feedback loop to get it from expo over linear to logaritmic? have you been succesful with this idea?

Dude! I need this lol, I’m brand new to building pedals but I’m seriously fascinated with everything. PLEASE do more of these videos for the other popular circuits. You’re the only one I’ve found that actually explains what all the components are actually doing and it’s super helpful. Thanks!

Dude! I need this lol, I’m brand new to building pedals but I’m seriously fascinated with everything. PLEASE do more of these videos for the other popular circuits. You’re the only one I’ve found that actually explains what all the components are actually doing and it’s super helpful. Thanks!

Very clear and helpful!! Keep posting videos like this! Thank you!

2nd AOP is reversing signal polarity, like first. So you end with no reversed polarity.

the power section is almost as complicated as a whole Fuzz Face.

Such a perfect and simple circuit. 1 battery. 1 case. 2 jacks. 2 transistors. 3 caps. (5 with your improved version), 4 resistors.

can this bypass be replaced by a dpdt switch ?

Can you make a npn fuzz face

i wish for you to not be so upset with yourself by the end. your doing a great job and all your videos are so helpful, just take your time and have fun!

Hey thanks for the tips! Does your keystep also forget some program change datas sometimes? It does on mine and it makes me crazy 🤯🤯🤯

Dude.. the diode isn't a 'Fuse'. That is a perfect use of a diode and it is what they were designed for. Hard to take the rest of this seriously when you fail miserably within the first minute. Why don't you explain a better way to do this? And it has to be as cheap as a single diode.

Dude sounds like Butthead when he says “uhhhh” 😂

Diodes are a bit too rounded! Marshall had a better idea using LEDS

Google schmitt trigger !

I just wired this up with some germanium PNP's taken out of an old Japanese radio and it sounds UN-REAL. Thank You! Hot Tip: By switching the positions of the 470 and 8.2K resistors you get a lot more volume!!

9:00 The input impedance of Q1 (without considering the feedback) can be considered more or less equal to the resistance of the transistor, or "r pi" (r pi= Vt/Ib, or r pi= beta (Hfe)/gm). If "gm" is 0.0088 siemens, and beta of Q1 is 90, the impedance would be 10k (but "beta" is real life is Ic/Ib, it's usually slightly different from the value that the manufacturers give us, because it varies depending on the current and t°. In the real circuit, Z will be sligtly lower due to the feedback effect (100k) and fuzz control 9:35 In this configuration, AV gain can also be calculated as Rc/re* (*dynamic resistance of the emitter; there is no external physical resistance ,only the internal resistance between base and emitter). re = Vt/Ic, or re=1/gm . Again, in the circuit it will be lower due to feedback effect of 100k res.

1:27 that's called "split emitter resistance" (It's used a lot when you want a high, but controlled gain; a compromised solution) and helps to stabilize the gain, making "re" (the dinamic, internal base-emitter resistance) less relevant in the circuit. It's the same as setting the fuzz control at 9/10 of the total travel, there is a small resistance between the capacitor and the emitter (that capacitor is feedback path for the AC signal, when the pot is at its maximum, there is only "re" (internal) between Q2 emitter and ground) That's why a "REV LOG" pot in fuzz control is more functional than a linear/log one (you want fine control towards the end of the travel, so you can leave a very small "split emitter resistance" if you want)

you calculate 14Hz cutoff at the input. What resistance value are you using? This must include the base to emitter of the transistor, yes?

These videos are exactly what i was looking for thank you

Great video!You explain the circuit thoroughly!Enjoyed the 'exit-music' as well!

Thanks =) I was stuck !