CV2298 transmitting tetrode, serial number 1280.
This valve has thoriated tungsten filament. It is a modified version of the CV1583, which itself was based on the E1024/CV1114 or VT114 valve which replaced the silica NT77 in the MB2 mobile ground radar system.
The filament leads required cooling with at least 10 cubic feet of air/minute, and the anode required forced air cooling of at least 85 cubic feet/minute.
The valve was intended to be operated at a constant 70A filament current, with the filament voltage being adjusted between 9.3 and 10.7V.
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