Sensibly equivalent¶ to:
The 9002 is a UHF receiving triode for use as a Class A amplifier. The electrode assembly is very small, of the same scale as an acorn valve. Indeed I believe that the 9002 is a repackaged 955 acorn valve.
B7G valves were make in the USA in the early 1940's but not made in the UK until 1947 or so.
The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 35 mm tall.
Reference: Datasheet. Type 9002 was first introduced in 1943.
Absolute Maximum Operating Conditions¶
Updated May 24, 2013. shape:thin.glass.tube construction:all.glass type:triode age:1940.1950 base:b7g heater:6.3v pins:7 pin:1.a pin:2.k pin:3.h pin:4.h pin:5.a pin:6.g1 pin:7.k