Cathode construction for linear beam tubes
Coaxial triode apparatus
Electron emission device with grid electrode
Electron tube, especially transmitting tube, with a device for e
Electron tube, in particular a transmitter tube
High power switch tube with Faraday cage cavity anode
Structures, electron-emitting devices, image-forming...
Ultraviolet germicidal lamp base and socket
Vacuum tube grid structures of phosmic bronze having copper and