The CV312 is a vacuum half wave rectifier on a giant Ediswan screw base. The anode dissipation is 50 Watts and the maximum PIV is 65 kV. The prototype was the VX312.
The helical thoriated tungsten filament.
The Giant Edison Screw base for the filament.
The wide glass tube envelope is 46 mm in diameter, and 10cluding the GES base is 270 mm tall.
