The CV2239 is an amplifier triode designed for dry battery operation. The Hivac range of miniature wire-ended valves were used in hearing aids in the 1950s and early 1960s. The CV number indicates that these valves were also used in equipment used by the UK government. Portable personal radio communications would be the obvious application.

The thin glass envelope is 8 x 5 mm in section, and excluding the lead-out wires is 42 mm tall.

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	1.25	0.12	135	-5	4.0	-	1.65

This exhibit was last updated on 25 December 2006