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CV850

Sensibly equivalent to:
5654 6AK5 731A CV4010 EF95
    
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The CV850 is a low noise RF voltage amplifying pentode, designed to operate at VHF.
See also 6AK5 the prototype for more details.
A true pentode, the open pitch suppressor grid helix with the closer wound screen grid within. The control grid wires are just visible either side of the support rods.
Side view: the heater can be seen to be coiled and then insulated.
The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins measures 36 mm tall.
References: Data-sheet & 1040. Type CV850 was first introduced in 1952.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k
h
h
a
g2
k

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.175
180
120
-2
7.2
2.4
0.7M
5.1
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 07, 2021.
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