Sensibly equivalent¶ to:
The PCC189 is a low impedance high gain double triode. The technical specification specifically states that it is built with frame grids. The valves are variable μ types for use at RF as AGC controlled devices. The low voltage high current suggests a low noise design, probably as the front end stages in a television tuner. The low anode voltage suggests both stages used as a cascode (series connected) amplifier.
Mullard describe the PCC189 as: a VHF variable-mu frame-grid cascode double triode.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins it measures 47 mm tall.
References: Data-sheet & 1040. Type PCC189 was first introduced in 1960.
Absolute Maximum Operating Conditions¶
Updated April 17, 2014. shape:thin.glass.tube construction:all.glass type:double.triode age:1960.1975 base:b9a heater:300ma pins:9 pin:1.a pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.a pin:7.g1 pin:8.k pin:9.s