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CV1129

Sensibly equivalent to:
CV1879 MS/Pen/T NR71 VR129
    
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The CV1129 is an RF pentode based on the MS/Pen/T. Older service names were the NR71 and the VR129.
The silver gettering obscures the internal structure.
Looking through the top of the valve reveals little beyond confirming that the top cap connects to the anode.
The classic envelope is 44 mm in diameter, and excluding the B7 base pins is 107 mm tall.
Reference: Datasheet.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
4.0
1.0
4,000
125
-2.0
5.4
-
0.6M
2.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 24, 2019.
shape:classic construction:pinch type:pentode age:1930.1940 base:b7 heater:4.0v pins:7 pin:1.- 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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