Type 9003 is electrically equivalent to 'acorn' type 956 but re-engineered to B7G dimensions. The valve is classed as a vari-mu UHF receiving pentode.

Visually it can be seen that inside the miniature envelope there is a small volume taken up with the electrode assembly.

The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 36 mm tall.

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.15	100	-3	2.7	700k	1.8

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 12 June 2007 {find valves by name}