This exhibit has the paper Air Ministry label on side giving the valve the type designation of KTW62 and etched on the other side of the envelope is VR100 together with the MWT logo for Marconi. The valve is an MOV supplied during WW2 for RAF use. It is a variable-mu IF kinkless tetrode of the 6K7 class but with slightly more gain. Thousands were supplied during WW2 with the KTW62 used in the CR100.

The classic envelope is 36 mm in diameter and, excluding the IO base pins, is 104 mm tall.

 
Pin Connections

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2	g3	-	h	k	g1

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	100	-3	8.0	2.8	0.46M	2.9

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This exhibit was last updated on 07 August 2005