Silica valve exhibits
Thumbnail	Type	Description	Notes
	CV14	This is the swan song for silica valves. Around 1940 it was proposed for VHF high-power radar transmitters. Never went out the experimental phase. In 1943 it had been already canceled from the CV register.
	NT45A	Small transmitting triode, 1.2 kW. Complete with history sheet for return to a workshop in case of failures. Also referred to as CV1226, A.P.1347
	NT57D	Early silica triode designed for radar transmitters. Short electrodes, to operate at 45 MHz. With new lead sealing, it replaced the NT57 in 1938
	NT57T	Improved version of NT57. Thoriated-tungsten filament with 5 A current emission, about twice the current of NT57.
	NT63A	Silica transmitting pentode. 2.5 kW plate dissipation. Also referred to as CV1239, A.P.798A, 10E/442
	TYS5-2000	Power triode, capable of operation to 30 MHz.   2 kW plate power dissipation.
To the tube index		Home