Bill Jehle's Mad Scientist Guitar Lab

4.59K subscribers

147 videos

Vintage Circuits. Modern Tone. Endless Curiosity. Making and teaching with fearless curiosity — where experimentation, mistakes, and discovery spark real lea...

Latest Videos

Goodwill Auction Parts or Repair NOT WORKING Crate v5 Amplifier Repair

Turn CHEAP Speakers into a Guitar Amp

I Replaced the Tubes… and It Still Does Not Work 1950 TV Restoration Part 2

My Tube Tester Was Lying to Me… Bad Socket Fix (Knight 600 Repair)

Powering Up a BROKEN Vintage 1950 Tube TV Tele Tone TV-305 RESTORATION Part 1

Bringing a Vintage Tube Tester Back to Life! KNIGHT Series 600

I Built a Dim Bulb Tester for an OLD TV, With a HUGE Mistake!

I Added an EXTERNAL SPEAKER to a Tiny GUITAR AMP… The Tone Changed Completely

These Tiny Amps Sound TERRIBLE Alone But AMAZING Together!

This Fuzz Pedal Was Supposed to Be Broken But It Wasn't!

Can I Turn Junk into Something AMAZING

What Happens When You Hook Up a Guitar String DIRECTLY to an Amp

Can A Ring Modulator Sound Like a TRIODE Math Meets Octave Fuzz!

Asymmetrical Clipping Explained (PROOF From a Triode Datasheet)

Building A Ring Modulator From Scratch - VIEWER QUESTIONS

Building a RING MODULATOR From SCRATCH

Building A Ring Modulator From Scratch! Just OPAMPS

I Fixed My 40 Year Old Test Box! New Prototyping Rig!

How a Diode + LFO Becomes a Ring Mod-Style Guitar Modulator (No Op Amps)

How a Diode + LFO Becomes a Tremolo-style Guitar Effect (No Op Amps)

Use a DIODE to SWITCH AUDIO just like a TRUE BYPASS Active Diode Switch Explained Part 2.

A BYPASS Method Almost No One Uses! Active DIODE Bypass Explained

Testing Weird Pedal Setups You NEVER Tried! AC Delco PEDAL Tonestack DEMO

GM AC Delco Pedal BUILD and TEST. How Can This Little Box Change Your Guitar Sound

What Makes Old GM Radios Sound Cool LOUDNESS TAP and TONESTACK Frequency Analysis

AC Delco Tonestack Frequency Analysis with LTSpice

Rebuilding a 1970s VOLUME POT with CENTER TAP

Fender Princeton 5F2-A FREQUENCY ANALYSIS LTSpice TONE STACK Simulation Explained

Imperial Radio Guitar Amp REBUILT Testing Vintage Tubes Against New Stock

DIY Fender Princeton-Style Volume & Tone Control with Bypass Switch Experimental Tube Amp Series