Building the Shuguang EL34-B Vacuum Tube - Part 2, Sealing the Bottle
2:51
Building the Shuguang EL34-B Vacuum Tube - Part 1
21:37
Building a DIY Triode Vacuum Tube
3:51
How Vacuum Tubes Work
28:31
Tube Lab #148 - Loctal 7F7 & 7N7 Tubes Re-Based as 6SL7 & 6SN7 Tubes
33:34
The Mullard story
5:09
RCA Tube Manufacturing In Lancaster PA (1966)
25:27
Vacuum Tubes/Valves by Mullard ~Manufacture for Audio TV Radio
14:34