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CV1189

Sensibly equivalent to:
AC6Pen NR74
    
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This valve is classified as part of the NR series of pre WWII Naval Receiving valves.
The CV1189 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.
See NR74 for more images.
The classic envelope is 51 mm in diameter and, excluding the B7 base pins, is 116 mm tall.
References: Data-sheet & 1043.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
nc
g1
g2
h
h
k
nc
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 March 11, 2025.
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