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A50P

Sensibly equivalent to:
VP4B
    
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The A50P is a variable μ pentode for RF and IF amplifier use. The A50P is identical to the VP4B introduced by Mullard in 1935 as by then Mullard made valves for Ever Ready.
The reverse is plain gold coloured zinc paint.
The classic envelope is 42 mm in diameter and, excluding the B7 base pins, is 107 mm tall.
References: 4048, 1040 & 1043. Type A50P was first introduced in 1936.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
μ
4.0
0.65
250
250
-3
11.5
4.25
2.0
Updated March 23, 2014.
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