The EH2 made by Mullard's parent company Philips used the continental Ct8 base that was never popular with British Manufacturers, but enjoyed success in Europe. The EH2 is a Heptode designed as a mixer or frequency changer for superhet receivers.
An unusual feature is the picture of an aeroplane on the back of the envelope.
The classic envelope is 30 mm in diameter, and excluding the Ct8 base pins, is 83 mm tall.
Reference: Datasheet. Type EH2 was first introduced in 1938.
Absolute Maximum Operating Conditions¶
Updated February 22, 2013. shape:classic construction:pinch type:heptode age:1930.1940 base:ct8 heater:6.3v pins:8 pin:1.m pin:2.h pin:3.h pin:4.k pin:5.g3 pin:6.g4 pin:7.g2 pin:8.a pin:tc.g1