Illustration of a vintage computer vacuum tube on Craiyon
5L1M-OG Version 1 - Vacuum Tube - Sticker | TeePublic
File:The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental (14733890706).jpg -
Cathode, electron tube, electronicparts, phototube, tube, vacuum tube, valve icon - Download on Iconfinder