Short tube history
Early Wireless Tubes, the years before 1923
Radio Tubes
Special Tubes
Tuning Indicators
German Metal Tubes
German Military Tubes, (Wehrmacht, WW II)
German "Post" Tubes, (Telecommunication tubes)
Loewe Multi Function Tubes, 3NF, 2HMD, etc.
Transmitter tubes
American and English tubes
Close up: Tube ECH81
Tube Testers and rejuvenators, CRT-testers
History of Manufacturer Funke, (Tube testers)
Tube Boxes
Gnome tubes
Years of first production of tubes. Determination list.