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CV1135

Sensibly equivalent to:
CV6 DET20 E1148 NR80 VR135
    
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The CV1135 is a power triode based on the M-OV E1148 experimental valve that became the DET20. It is also known as the VR135 and the NR80.
As this valve is still sealed in the original wrapping it has not been opened.
The kraft paper wraps the inner box and the whole is sealed with glued paper tape.
Packed by Vernons Industries Ltd on 27 January 1948.
The identification on the ends as well as the side.
Beautifully folded.
This is what will be found inside.
The wide glass tube envelope is 30 mm in diameter, and excluding the IO base pins is 73 mm tall.
Reference: Data-sheet.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
mAa
Pdiss
Pout
freq
f.max
6.3
0.2
300
25
3.5W
4.25W
50MHz
300MHz
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 24, 2021.
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