The X18 is a battery heptode frequency changer or mixer. It was designed for AM broadcast radio reception on the short, medium and long wave bands.

The oscillator feed needs to 15 volts pk-pk.

The thin glass tube envelope is 20 mm in diameter and, excluding the B7G base pins, is 47 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	f(-)	a	g2	g1	g4	g3	f(+),g5

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.05	90	67.5	0.0	1.15	2.85	0.6M	0.32

This exhibit was last updated on 25 March 2006