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NR52

Sensibly equivalent to:
354V CV1173
See also:
CV1173 short entry
    
Extras ▼

 

This NR52 is metallised with a typical Mullard gold paint. The NR52 is a British Navy receiving valve, the commercial equivalent is a Mullard 354V triode, a design that dates from 1929 with improvements in 1930 and again in 1935. The μ for this valve was 40.
The NR52 was used after 1941 when CV designations were introduced, the type then was classified as CV1173.
The NR52 designation printed on the top of the glass. The AP number stands for Admiralty Pattern 1607 - the specification.
The classic envelope is 42 mm in diameter and, excluding the B5 base pins, is 91 mm tall.
References: Data-sheet & 1043. Type NR52 was first introduced in 1929.

 

Pin Connections
B5
1
2
3
4
5
a
g1
h
h
k

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
ra
gm
4.0
0.65
250
11,500
3.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 14, 2021.
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