The CV9934 (commercially the PCF82) is a television frequency changer from the VHF television era. Each section has its own cathode brought out to a pin. The pentode voltage rating is higher than the PCF80.
The commercial PCF82 is also on the glass.
The sections are separated by an electrostatic screen. The control grid is wound on copper supports and the heater is an insulated wire formed by coiling the thin brittle tungsten wire on a molybdenum mandrel that is later dissolved out in an acid bath.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 47 mm tall.
