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CV808

Sensibly equivalent to:
3A5 DCC90
    
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The CV808 is an RF double triode for battery operation and at up to 40 MHz. The data sheet for the commercial DCC90 says the design purpose was as a push-pull RF amplifier or oscillator and the rating are for intermittent operation. With two Watts of RF output in the HF section of the spectrum, a short range portable radio is indicated. This suggests professional/military voice communications.
The CV prototype was the 3A5.
The face view of one anode. A low power valve so the nickel sheet is left bright.
The twin box anode triode sections.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.
Reference: Data-sheet.

 

Pin Connections
B7G
1
2
3
4
5
6
7
f-
a(2)
g1(2)
fct
g1(1)
a(1)
f+

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
1.4
0.22
150
-2.5
3.7
8,300
1.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 30, 2021.
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