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AC/VP2

Sensibly equivalent to:
A50P CV2832 MVS/PenB VP41 VP4B W42
See also:
Murphy Radio
    
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The AC/VP2 is a variable μ screened pentode designed for mains radio receivers. The variable μ characteristic enables automatic gain control of RF and IF amplifiers in superhet receivers.
The AC/VP1 and AC/VP2 were the standard RF/IF screened pentodes in the Mazda range for AC mains radios from the mid-1930s until domestic radio manufacture was interrupted by WWII.
The two valve types were essentially identical except that the AC/VP1 has its anode connected to the top cap, as with most screen-grid valves. The AC/VP2 has the control grid (g1) connected to the top cap, as was standard for later IF pentodes.
The Mazda name and Type designation are printed in green ink onto the zinc metalising paint. The VP2 can just be made out on the full size image.
The classic envelope is 37 mm in diameter and, excluding the B7 base pins, is 102 mm tall.
References: Datasheet & 1040. Type AC/VP2 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
4.0
0.65
250
250
-2.8
7.4
1.85
1M
2.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 18, 2016.
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