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VMP4G

Sensibly equivalent to:
CV1169 CV3785 CV3786 NR45
See also:
CV1169 short entry - VMP4G and W31 Advert
    
Extras ▼

 

The VMP4G is a screened variable Μ RF amplifier pentode for use in broadcast superhet receivers.
The VMP4 and VMP4K were introduced in 1933/4. This improved version the VMP4G was introduced in 1935 as a glass enveloped version when the Catkin valves were phased out.
See also VMP4G with most of the external metal screen missing.
The reverse is plain paint with the letters P and VP.
The classic envelope is 39 mm in diameter, and excluding the B7 base pins is 103 mm tall.
References: Data-sheet & 1043. Type VMP4G was first introduced in 1935.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
4.0
1.0
250
100
-2
8.0
5.0
2.7
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated June 18, 2020.
shape:classic construction:pinch type:pentode age:1930.1940 base:b7 heater:4.0v pins:7 pin:1.m pin:2.g1 pin:3.g3 pin:4.h pin:5.h pin:6.k pin:7.g2 pin:tc.a
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