The 6M1 tuning indicator was a replacement type and not current in the mid 1950s.

The construction follows the usual pattern with the triode like amplifier above the pinch and the display viewed through an end window. The screen is circular and the central electrode is a small black button. The full display range is given for a 22.5 Volt alteration in grid voltage.

The wide glass envelope is 28 mm in diameter and, excluding the IO base pins, is 68 mm tall.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	-	h	a	t	g1	-	h	k

 
Absolute Maximum Operating Conditions

CRT	Vh	Ah	Va	Vg	mAa
	6.3	0.3	250	22.5	1.16

This exhibit was last updated on 04 August 2006