Biasing Double-Ended Amplifier Output Tubes, Part 1: Basic Explanation & Methods

Biasing Double-Ended Amplifier Output Tubes, Part 2: Demonstration and Discussion

How Tube Amplifiers Work, Part 1: The Power Supply

Biasing Single-Ended Amplifier Output Tubes: A Basic Explanation and Demonstration

Understanding Vacuum Tube Amplifier Schematics - Basics - Part 1

The Effect of Output Tube Bias on Tone, Gain, and Headroom.....A Side-by-Side Comparison

TTT082 Tube Circuits

Mastering Amp Biasing: A quick guide for biasing your valve amp

Eurotubes "Pro One" Bias Probe Evaluation.......Plus: Make Your Own Bias Probe

Biasing Tube Amps

Output Transformers: A Discussion of Basic Principles

How to Bias a Quad or Quartet of Output Tubes......Theory and Practice

How to Measure Tube Amplifier Plate Current (Biasing) and Actually Understand What You Did

How to build a reliable negative bias supply for a Tube Amp.

Building a 1920s Tube Amplifier (And Tubes!)

Transistor Push Pull Amplifier, for the Beginner, no transformer, the basics

Understanding Vacuum Tube Amplifier Schematics - Push Pull - Part 3

Vacuum Tubes Explained! How Do Radio Tubes Work?

Do You Always Need to Bias New Tubes?

Preamp Gain Stages: the Cathode Resistor. GAIN, TONES & THEORY!!!