Title

thermionic tube or thermionic valve

Caption

thermionic tube or thermionic valve Invented in about 1910, were a basic component for electronics throughout the first half of the century, which saw the diffusion of radio, television, radar, sound reinforcement

Date

1910

Credit line

Photo12/Ann Ronan Picture Library

Reference

ARP18A30_304

License type

Rights managed

Available size

29,8Mb (1,3Mb) / 9,2in x 12,6in / 2755 x 3780 (300dpi)

Keywords

thermionic tube technology radio telecommunications thermionic valve 20th century