[bars] How Vacuum tubes are made video

[Bruce Anderson]

https://www.youtube.com/watch?v=-GgWIlvyEL8
[https://www.bing.com/th?id=OIP.4E_Tmnt4lgkjhtN3LPLgwQEsDh&pid=Api]<https://www.youtube.com/watch?v=-GgWIlvyEL8>
The Mullard story<https://www.youtube.com/watch?v=-GgWIlvyEL8>
The Mullard story, see how these great valves were made.
Bruce
W1LUS


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