Vacuum Tubes: Episode 5 – The Pentode

Vacuum Tubes: Episode 6 – The Heptode/Pentagrid Converter

Vacuum Tubes: Episode 1 - The Basics and the Diode

Guitar Amp Vacuum Tubes Part 1: Triodes and Tetrodes

Vacuum Tubes: Episode 2 - The Triode (Part 1)

How A Tube Works

How Tube Amplifiers Work, Part 1: The Power Supply

The World’s Largest 555 Timer… Again!

Vacuum Tubes Explained! How Do Radio Tubes Work?

Vacuum Tubes/Valves by Mullard ~Manufacture for Audio TV Radio

Building a Tube Amp! Does it produce better audio quality though? EB#47

Guitar Amp Tubes Part 2: Pentodes and Beam Tetrodes

SR Flip Flop Display: Part 1 – Negative Voltage from Positive Voltage using a Hartley Oscillator

Let's design an build a vacuum tube amplifier from scratch

AT&T Archives: A Modern Aladdin's Lamp, about vacuum tubes,1940

making a miniature vacuum tube triode

TTT081 How Tubes Work

How Vacuum Tubes Work

How To Make Electron Tubes - P&C Electronics

Hand Made Vacuum Tubes by Claude Paillard