The EM80 miniature tuning indicator produces a fan shaped display in green. Mullard describe the EM80 as a tuning indicator for use in FM or AM receivers. The grid voltage range is 13 Volts. Electrically it is similar to other tuning indicators, the valve consists of a triode amplifier that is linked to the indicator device. The control of the image is effected by the triode cathode being connected to the display grid.

The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 57 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	g	k,g	ic	h	h	ic	a	ic	t

 
Absolute Maximum Operating Conditions

CRT	Vh	Ah	Va	mAa
	6.3	0.3	250	2.3

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 11 July 2007 {find valves by name}