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VR137

Sensibly equivalent to:
CV1137 EC52 RL16
See also:
CV1137 short entry
    
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The VR137 was specified for VHF low power transmitter use and the commercial name is EC52. The anode dissipation is 7 Watts and the full power frequency rating is 300 MHz. The maximum frequency that useful power could be obtained was 400 MHz.
The control grid with cooling fin. Only one side of the envelope is used for the triode.
The Cathode is flat through the anode and the grid is close wound as can be seen both from the few turns of wire visible and the spacing of notches on the copper support rods.
The wide glass tube envelope is 32 mm in diameter and, excluding the B9G base pins, is 59 mm tall.
References: Datasheet, 1040 & 1043. Type VR137 was first introduced in 1946.

 

Pin Connections
B9G
1
2
3
4
5
6
7
8
9
h
g1
k
a
nc
nc
nc
nc
h

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
Pdiss
freq
f.max
6.3
0.43
250
-2.6
10
9.2k
6.5
7W
300
400.
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 28, 2017.
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