The KT61 audio output valve, part of a series of very successful valves from M-OV, features the standard 6.3 Volt heater that was introduced from America.

The classic envelope is 42 mm in diameter and, excluding the IO base pins, is 102 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Beam Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm	Pout	D
	6.3	0.95	250	250	-4.4	40.0	8.5	10.5	4.3	8%

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This exhibit was last updated on 12 January 2004