Modifying a Clean Boost Guitar Pedal
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- Опубліковано 2 лип 2024
- This video look at how we can modify the basic Clean Boost (see previous videos) into a distortion pedal using clipping diodes set up in both the "soft" and "hard" clipping configurations.
00:00 Introduction
02:08 Breadboarding the original circuit
02:32 Adding Diodes - Silicon - Soft Clipping
03:24 Guitar - Soft Clipping - Clean(!)
03:34 Increasing the gain of the circuit for clipping
04:34 Addressing (some of) the circuit noise
05:34 Guitar - Soft Clipping - 1n914 silicon diodes
05:50 Using green LEDs as soft clipping diodes
06:21 Guitar - Soft Clipping - Green LEDs
07:24 Adding Diodes - Silicon - Hard Clipping
09:03 Guitar - Soft and Hard Clipping - 1n914 silicon diodes
09:19 Guitar - (just) Hard Clipping - 1n914 silicon diodes
09:40 Using Germanium D9E for Hard Clipping
10:08 Guitar - Hard Clipping - D9E Germanium diodes
10:44 Visualising Clipping Diodes on the Oscilloscope
17:00 How I have the scope probes set-up
17:18 About Diodes
21:16 Measuring Diode Forward Bias on a multimeter
24:48 Diode Curve Tracing Circuit
25:22 Curve tracing diodes in XY mode on the scope
27:29 Recap and Outro
The notes shown in this video are here: bit.ly/3yTO7E4
Other videos in the Clean Boost series:
1. Building a Clean Boost Guitar Pedal
• Building a Clean Boost...
2. Troubleshooting a Clean Boost Guitar Pedal
• Troubleshooting a Clea...
I am no expert in electronics, I remain a curious hobbyist. However, I have always been fascinated in learning how audio electronics works. Disassembling various radios as a kid and eventually becoming interested in designing and building guitar effects pedals. I attempt to understand how these systems operate electronically, and due to this approach, I have picked up a few bits of theory along the way. If you're unsure about it, my best advice is just get started, mistakes and corrections (and the occasionally popped component) is how we learn. You win or you learn
If you found this useful, want to correct my knowledge or want to know more about my DIY pedals and test gear leave a comment below.
Follow my other projects here:
/ beliefspacestu
If you'd like to support my channel and get some cool stickers, you can find my Etsy Store here (I'll be adding some electronics kits in the future): www.etsy.com/uk/shop/MusicTec...
I'm just getting into pedal building, and I have to say you have THE best videos on it that I've found thus far. The in-depth of the parts and how they actually effect the sound wave as well as showing the math to go along with a lot of it as well as explaining your schematics extremely well has really helped with me grasping the circuitry!
Patiently waiting for that future video lol. Great vid man
Thanks, Greg. Won’t be too long, I’m working on it 👍
Thank you so much for these videos
You're a natural teacher and give some exceptional explanations for a complete beginner like me
Watching a lot of other content, I come away with a list of things to try and copy, but I don't understand them
With your videos, I come away understanding why these circuits are designed the way they are and that is infinitely more empowering. Thank you again for sharing your knowledge and expertise
Thanks, Adam. I appreciate the positive feedback, which also empowers me, to continue to make these videos and share my love of audio electronics and guitar fx.
Excellent tutorial .
Thanks, Seamus.
Thank you so much for these videos
Thanks, Marcin, I appreciate the positive feedback. Glad you're finding them useful. I've had a very busy year at work but more videos are definitely coming :)
I am not an expert in electronics either, but shouldn't you have a current limiting resistor on the output diodes? BTW your input voltage divider solved a problem I had on another project, thanks!
Glad the voltage divider helped, Jim. You are absolutely right about a resistor, a 1K between the 100nF capacitor and the diodes would be best practice for a number of reasons, which include protecting the OpAmp. Your excellent comment led me to measure the maximum current through the output diodes and it reached about 3.5mA peak without the 1K resistor and 2.5mA peak after (with the 220k and 10k resistor setting the gain). A Ge should be able to handle around 50mA and a Si about 200mA. So, the didoes themselves should be okay in the experimental setup here. The resistor would also change the clipping characteristics of the diodes very slightly, so it is definitely one to experiment with. The MXR Disotrtion+ uses 10K with 1n34a point contact Germanium diodes, the ProCo Rat 1K and 1n914 Silicon Didoes.
Hi, I built this circuit and it works fine. Then I added a DPDT switch to switch between boost signal and true signal. During switching it makes a loud sound for an instant. I think it's resulting due to the signal bouncing in the switch. Is there any solution for that? Pls let me know.
That might be a switch pop. There’s a brilliant article about it here. www.muzique.com/lab/pop.htm
I’d try the pull-down resistors first.
Oh man, tell me, how dumb am i?
I bought silicon diodes instead of germanium. I guess this circuit won't work, right?
The 1n914 (and indeed the 1n4148) I use prior to the Germaniums are (small signal) silicon. The forward voltage is 600mV-ish on those, same as your 1n4007s, so they should work. I'm always buying diodes of all shapes and sizes as they all sound different in clipping circuits.
I do recommend getting some vintage, point-contact germaniums though, they sound ace in clipping circuits.
@@MusicTechknowledgy Thanks for the advice.
Thank youuuuu..