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KT42

Sensibly equivalent to:
7A2 A70B AC/Pen APP4A CV1174 MKT4/5 MKT4/7 MP/Pen N40 P4VA Pen4VA
See also:
CV1174 short entry
    
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The KT42 is a beam tetrode audio power output valve from 1937 and it replaced the pentode N42 released the previous year in 1936. The rated anode load is 7,000 Ohms.
The classic envelope is 43 mm in diameter and, excluding the B7 base pins, is 100 mm tall.
References: Datasheet & 1040. Type KT42 was first introduced in 1937.

 

Pin Connections
B7
1
2
3
4
5
6
7
-
g1
g2
h
h
k
a

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
Pout
4.0
1.0
250
250
-16.5
34
5.5
2.5
3.25
Updated April 07, 2015.
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