The 9002 is a Class A UHF receiving triode. The electrode assembly is very small, of the same scale as an acorn valve.

The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 35 mm tall.

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	μ
	6.3	0.15	250	-7	6.3	11.4k	2.2	25

Thanks to Frank Philipse for supplying the above PDF datasheet

 

This exhibit was last updated on 18 July 2007