The PC900 is a miniature VHF amplifier triode for use as an RF amplifier in television receivers. It is low impedance and has a high mutual conductance. This is partly achieved by a very small cathode to grid spacing. The anode is made of two rectangular channels, one either side of the cathode. The beam plates form the electrons into two beams.
Clearly an imported valve. The two halves of the anode are connected by straps.
Each side of the anode is shaped so that only a small flat face is close to the grid. Around the small working rectangle of the anode is a bright beam containing plate. The centre rectangular structure is the double sided frame grid. The wire of the grid can only be seen with a magnifying glass.
The other side of the anode is shaped identically.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 34 mm tall.
References: Data-sheet, 3002 & 1040. Type PC900 was first introduced in 1963.