This video is the first part in a deepdive into ElectroHarmonix Linear Power Booster pedal, the EHX LPB1. We cover the basics and get slightly more technical with a basic DC Analysis.

The circuit is a simple Common Emitter Amplifier with Voltage Divider Bias and Emitter Degeneration Resistor.

NOTE: If you already know how an NPN transistor PN junction is made, then you can jump straight to 16:13 for the Basic DC Circuit Analysis.

00:02 Introduction
00:35 Quick Circuit Walkthrough
02:31 Semiconductors
03:46 PN Junctions
05:40 NPN Transistors
08:11 Transistor Regions
09:46 Transistor Regions Demo
11:11 Transistor Current Demo
13:58 Using Engineering Notation
16:13 Basic DC Analysis
31:27 Calculations Vs. Measurements
38:26 Oscilloscope Test
40:28 Outro

My notes can be found here:
https://www.dropbox.com/scl/fo/z4hlxd...

Coming up in Part 2 AC Analysis, Input/Output Impedance and Frequency Response.

Finally, Part 3 will be a look at the current production version which has some extra components and filters.

I am no expert in electronics, I remain a curious hobbyist. However, I have always been fascinated in learning how audio electronics works and, as I make these videos my knowledge increases massively, I hope yours does too. If you're unsure about the more technical side of things, my best advice is just get started, mistakes and corrections (and the occasionally popped component) is how we learn.

If you found this video useful, want to correct my knowledge, or just want to know more about my DIY pedals and test gear leave a comment below.

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): https://www.etsy.com/uk/shop/MusicTec...