" UNDERSTANDING ELECTRONICS: VACUUM TUBES " 1970 EDUCATIONAL FILM DIODES & TRIODES XD72594
21:32
AT&T Archives: A Modern Aladdin's Lamp, about vacuum tubes,1940
25:27
Vacuum Tubes/Valves by Mullard ~Manufacture for Audio TV Radio
19:45
1950’S TRANSISTOR TRAINING FILM " SEMI-CONDUCTORS: DIODE AND TRIODE FUNDAMENTALS ” 43124
13:27
WWII RADIO OPERATOR VACUUM TUBE TRAINING FILM 77564
19:50
8 awesome application of diodes in circuits.
29:55
“BASIC PRINCIPLES OF FREQUENCY MODULATION” 1944 U.S. WAR DEPARTMENT FILM FM RADIO 86794
27:07
How A Tube Works
27:34