Відео

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 !

What's the resistor labeled RA?

Great video! I have a question, where would you put the 3 PDT switch? Does anyone have a schematic with it included? And what is the pinout for the switch, having trouble with this part. Thanks!

Brilliant video - Thanks!!! I'm newbie developer and at the very beginning of the learning curve but this was just what I needed to start to understand Distortion pedals. (Thanks again!) One question: I understand the LM308 is an OpAmp... I'll try and get hold of one but, as I've been building small battery amps, I have a load of LM386s laying around: Could I use one of those instead? Many thanks :-)

They have every muff schematic except the op-amp apparently

thought that was a filter cap on the power there.. (C17)

There's no bypass path for when the pedal is not engaged.

Really appreciate this video! The struggle is real! I seem to have got program changes working from KSP with my Dreadbox Nymphes. I did have to muck around with the LSB a little but I didn't have to change them all to 2... I kinda just went and scrolled through the LSB values once and that seemed to kick start it into gear? Very confusing. Anyhow, it is working now but I'm experiencing a slight but still annoying lag/latency when the patch changes. I'm new to PC's and CC's in general so I don't know if this is just a common thing when trying to do this stuff? Or if the latency might also be part of the 'buggy new feature' situation. Any more info come to light since the last comment? Haha

So that's what they mean by 'mid scooped'

Would be cool to see the pedal side by side and walkthrough the schematic alongside the pedal. Great info nonetheless.

Just got my KSP and am hitting a similar issue I think. I can't get it to send program changes to neither my Minifreak nor my Hydrasynth. Tried your LSB trick, which I thought would have at least worked on the Hydrasynth, but alas, it did not. Tried messing with all three settings with both synths, but no dice. Also gotta love how that PC Send function isn't even mentioned in their manual, lol. Feels like I'm missing some global "allow sending midi program changes" setting somewhere...

It is a second schematics from two I've seen on this channel, where is an error that makes the circuit not working at all. Here it is the bias for the last transistor, which will drive it into full saturation, so no signal passing at all. To me it seems like the R7 is supposed to be connected to the collector as the feedback as well, like the previous stages, then the operating point will be in the 4.5V ballpark on the collector... This remark is not on the author of the video, but it seems the literature contains intentional errors in it to make the circuits not working.

being a begginer in electronics, i am only able to get the gyst and cannot converse fluently or articulately in these things.i have a question about that section you went over after the opamp and after the diodes. i think you said resister and capacitor where freq. begins to drop. Could you split that say into 3 seperate differing resisters to move the frequency fulcrum to 3 different spots for cascadeing drops?

So, where might one hope to find the foundational knowledge requisite to understanding most of the language and elements of this video?

I'd actually really enjoy an explanation of the JFET bypass circuit! Is it a common bypass utilized often in pedals?

Two things. Besides diode position, you can make a diode ladder (google Prairie Instrument Works' blog post) to finetune the clipping knee. Secondly, for the transistor gain stages, the diodes also come with a large-ish cap in series, so I'm sure you can look at it from an AC and DC perspective when you set it up.

do the guvnor next🙏🙏

why is the Vbe of q1 just 0,2 V ( I expect 0,7V) are those germanium?

Background music at 4:28 sounds like Inca Roads solo section

Please keep these videos up! Absolute gems.