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6F8G

Sensibly equivalent to:
CV1917
    
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The 6F8G is a medium-μ double triode. Primary use is as a Class A voltage amplifier with resistance/capacitance coupling.
Each triode has the characteristics of the 6J5 triode. From the 1950s the ECC82 was providing almost identical characteristics in a miniature envelope.
Side view of the two triode towers.
The triode on the right has a curved anode and a cooling fin on the copper supports of the control grid.
The classic envelope is 38 mm in diameter, and excluding the IO base pins is 95 mm tall.
References: Datasheet. Type 6F8G was first introduced in 1943.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
μ
6.3
0.6
250
-8.0
9.0
7,700
2.6
20
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 11, 2017.
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