Tube Talk Part 2 - Are Vacuum Tubes Radioactive?
49:09
Tube Talk - Pentode vs. Beam Tetrode and how they work
17:14
Another Look at an X-Ray tube: Part 1
10:40
Vacuum Tubes: Current Production and New Old Stock
33:34
The Mullard story
10:21
Triode Vacuum Tube: History & Physics
59:39
Intro to Vacuum Tube (Valve) Testers
13:44
Computer History 1949 -1960 Early Vacuum Tube Computers Overview, History Project Educational
1:06:51