The CV419 (commercially this was the DET18) is a directly heated power triode for use at up to 120 MHz, typical output would be 75 Watts of RF. The anode can dissipate 50 Watts.
For use above 75 MHz it is recommended that a pair be used in push-pull to generate up to 100 Watts.
The Z identifies the maker as MO Valve Company, Hammersmith.
The cage grid is supported on a tripod of supports. The anode hangs from the top bead.
The cage grid with the helical filament within. The top of the filament connects to the rod passing up the centre.
A clearer view of the main geometry. Also note the wire holding the cage wires.
The top connection is broken but the glass is not broken.
The wide glass tube envelope is 46 mm in diameter, and excluding the UX4 base pins is 118 mm tall.
