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1637

Sensibly equivalent to:
CV1052 EL32 POVT180 VT52
    
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The 1637 is an American copy of the VT52/EL32 supplied as part of the WWII war effort.
The wide glass tube envelope is 28 mm in diameter and, excluding the IO base is 88 mm tall.
References: Data-sheet & 1043.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
-
h
a
g2
-
-
h
k
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
6.3
0.2
250
250
-18
32
5
70,000
2.8
3.6W
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 28, 2020.
shape:wide.glass.tube construction:pinch type:pentode age:1940.1950 base:io heater:6.3v pins:8 pin:1.- pin:2.h pin:3.a pin:4.g2 pin:5.- pin:6.- pin:7.h pin:8.k pin:tc.g1
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