The KT71 is an audio beam tetrode output valve that was designed for use in AC/DC equipment such as universal voltage radio receivers and television sets. In single ended use an output of 5 Watts was possible with an anode load of 2400 Ohms. If used in push pull class AB1 a pair of KT71's would generate 11.5 Watts at 4.5% distortion.

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
	48	0.16	175	175	-9.8	70	12	10	5W	9%

This exhibit was last updated on 02 August 2006