Sensibly equivalent¶ to:
The PC88 is a UHF triode designed for the front end RF amplifier in Band IV and Band V television tuners. Mullard describe the PC88 as: a UHF frame-grid grounded grid amplifier triode.
Our other Mullard PC88 is British made and has gold plated pins, this exhibit has plain pins and carries the pejorative origin of Foreign.
The construction is planar. The flattened cathode has a frame grid surrounding it. Even under magnification the grid wire strands are very hard to see. Beyond the grid is a square U channel anode with its flat end to the grid. The approach to a minimizing the lead inductance is to use multiple pins for the grid connection. The relatively high anode current was employed to reduce noise.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 40 mm tall.
References: Datasheet & 1040. Type PC88 was first introduced in 1962.
Absolute Maximum Operating Conditions¶
Updated February 02, 2018. shape:thin.glass.tube construction:all.glass type:triode age:1960.1975 base:b9a heater:300ma pins:9 pin:1.g1 pin:2.k pin:3.g1 pin:4.h pin:5.h pin:6.g1 pin:7.g1 pin:8.a pin:9.g1