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KT71

Sensibly equivalent to:
50L6G
    
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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. It was issued in the early 1940's.
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.
References: 1040 & 1043.

 

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%
Updated January 23, 2013.
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