The CV1363 is an HF amplifier triode for use up to 30 MHz. It may also be used in Class B as a zero bias amplifier where an output of 350 Watts may be obtained from a pair.
Terry Collard had annotated this valve with the fact that it was used in an early warning Radar. The radar is in the Science Museum London.
The anode end with the ceramic sheet acting as insulator and support. The thick graphite anode has a square section on the working face through which the anode supports pass. The filament is prevented from sagging by the tension springs that can be seen above the ceramic.
The springs end in hooks that hold the filament loops. The filament thus passes through the valve as six times.
The wide glass tube envelope is 64 mm in diameter, and excluding the base pins is 226 mm tall.