Sensibly equivalent¶ to:
The DET22 is a UHF disc seal triode developed during WWII. The heater and cathode are opposite the main envelope. The grid has a circular connection to the flat internal metal mesh. The anode appears to be copper and has a flat surface facing the grid. It is rated at 10 Watts dissipation.
A grounded grid configuration would allow for a two cavity mechanical design.
This valve is rated at 600 MHz but its extended maximum frequency of 4 GHz made it a natural choice for microwave designs.
Unlike other versions of this valve the Osram process gives a flat top and a smaller envelope length by 5 mm.
The planar envelope is 15 mm in diameter and 55 mm long.
References: Data-sheet & 1005. Type DET22 was first introduced in 1945.
Absolute Maximum Operating Conditions¶
Updated April 05, 2015. shape:planar construction:disc.seal.(glass) type:triode age:1940.1950 base: heater:6.3v pin: