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NR64

Sensibly equivalent to:
CV1281 KTW61 W281
    
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The NR64 naval receiver valve is a variable μ amplifier pentode. This suggests use as RF or IF stages in an AGC controlled superhet receiver. The control grid connected to the top cap reinforces this view.
The classic envelope is 36 mm in diameter and, excluding the IO base pins, is 104 mm tall.
References: 1040 & 1043.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
m
h
a
g2
g3
-
h
k
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
250
100
-3
8.0
2.7
0.46M
2.9
Updated January 13, 2013.
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