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EC52

Sensibly equivalent to:
CV1137 RL16 VR137
See also:
Mullard EC52 Advert - A Magnetic Digital Storage System - CV1137 short entry
    
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The EC52 is a small transmitting valve from the early days of all glass construction. It was designed for VHF operation, and probably mobile equipment. It was originally given the Type designation of RL16.
The picture shows the flattened oxide coated cathode and the gold grid wire can also be seen. The anode is carbonized. The whole electrode assembly takes up less than half of the envelope, and a second valve could be physically fitted into the envelope.
The wide glass tube envelope is 30 mm in diameter and, excluding the B9G base pins, is 55 mm tall.
References: Datasheet, 1040 & 1043. Type EC52 was first introduced in 1941.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
Pdiss
freq
f.max
6.3
0.43
250
-2.6
10
0.7W
300MHz
400MHz
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 04, 2015.
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