The VU134 is a half wave EHT rectifier. It would have been designed for provision of EHT in such applications as Cathode Ray Tube indicating instruments. Radar and Oscilloscopes primarily.
The bright cylindrical anode supported on glass rods anchored into the pinch.
The rigid construction with two vertical supports for the cathode.
The heater is helically wound on a central ceramic support and then coated in insulation that bonds the wires to the support.
The top mica holds the tops of the supports and the reduced diameter section of the cathode tube.
The valve came in the original packing. This slip pasted to the outside of the box shows that the valves in the stores were re-labelled to give the new CV designation. The valve inside remained VU134.
The classic envelope is 45 mm in diameter, and excluding the B4 base pins, is 110 mm tall.
References: Data-sheet, 1040 & 1043. Type VU134 was first introduced in 1937. See also1937 adverts.
