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NR74

Sensibly equivalent to:
AC6/Pen CV1189 PV1-35
See also:
CV1189 short entry
    
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This valve is classified as part of the NR series of pre WWII Naval Receiving valves.
This valve is equivalent to the commercial AC6/Pen and was designed for timebase output in early TVs and oscilloscopes. The cathode resistor is given as 90 Ω.
The classic envelope is 48 mm in diameter and, excluding the B7 base pins, is 118 mm tall.
References: Datasheet & 1043. Type NR74 was first introduced in 1938.

 

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

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
4.0
1.75
310
210
-6.9
63
14
8.5

 

Absolute Maximum Operating Conditions
Beam Tetrode
Pdriv
Pout
freq
f.max
1.0W
73W
20MHz
60MHz
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 09, 2015.
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