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Pen4VA

Sensibly equivalent to:
7A2 A70B AC/Pen APP4A CV1174 KT42 MKT4/7 MP/Pen N40 P4VA Pen/4VA
See also:
Mullard AC Mains Valves - A High-Power Pentode and Other New Valves - CV1174 short entry
    
Extras ▼

 

The exhibit is a Mullard Pen4VA on a B7 base cap. The Pen4VA was, in 1933, the Mullard answer to the landmark Mazda AC/Pen of 1930 for audio output within AC mains sets.
The dome carries the identification on a coating of zinc loaded paint.
The classic envelope is 49 mm in diameter and, excluding the B7 base pins, is 113 mm tall.
References: Data-sheet, 4024 & 1043. Type Pen4VA was first introduced in 1933. See also 1933 adverts.

 

Pin Connections
B7
1
2
3
4
5
6
7
nc
g1
g2
h
h
k,g3
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
rk
rl
Pout
D
4.0
1.35
250
250
-20
36
3.0
40,000
2.8
500
6,000
3.4W
10%
PDF scanned from an original document held by the museum
Updated January 03, 2022.
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