The PCF82 is a triode beam tetrode mixer 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.
Left to right: triode, screen and beam tetrode with beam plate visible between the anode side straps.
The triode with bright screen plate behind.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 48 mm tall.
References: Data-sheet & 1040. Type PCF82 was first introduced in 1953. See also1953 adverts.