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NR70

Sensibly equivalent to:
ARP23 CV1124 MS/Pen VR124
See also:
CV1124 short entry
    
Extras ▼

 

NR70 is a designation of the UK Navy before the introduction of the Common Valve designations in 1941. The CV1124 is the same valve. Electrically the MS/Pen (or MSP4) is the closest commercial type but originally on a B5 base as well as the B7, MS/Pen was released in 1933.
The zinc paint covers the envelope and little more than the top mica is visible.
The classic envelope is 44 mm in diameter, and excluding the B7 base pins is 118 mm tall.
References: Datasheet & 3002.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
-
g1
g3
h
h
k
g2
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
4.0
1.0
250
125
-
-
-
0.8M
2.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 04, 2015.
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