Sensibly equivalent¶ to:
The PCC189 is a low impedance high gain double triode for use as a cascode amplifier in television front-ends. It 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 indicates a low noise design.
The PCC88 has the same base and heater but is a sharp cut-off design.
A UK product and a view of one anode.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 48 mm tall.
References: Datasheet & 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(2) pin:2.g1(2) pin:3.k(2) pin:4.h pin:5.h pin:6.a(1) pin:7.g1(1) pin:8.k(1) pin:9.s