Vacuum Tube Amplifier Theory
25:27
Vacuum Tubes/Valves by Mullard ~Manufacture for Audio TV Radio
22:34
How Valve Guitar Amplifiers Work Part 1
59:55
Understanding Vacuum Tube Amplifier Schematics - Power Supplies - Part 2
20:02
Class A Vs AB amplifiers Pt 2: The magic of vacuum tube amplifiers!
19:55
Electronics Introduction to LC Oscillators circa 1974 US Air Force Training Film
27:07
How A Tube Works
17:12
Hand Made Vacuum Tubes by Claude Paillard
26:38