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VT-86

Sensibly equivalent to:
6K7
See also:
Metal Striptease - The 'Magic Three' Valves
    
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The VT-86 is the American Government specification, commercially this is a 6K7 variable-μ pentode that was designed for RF and IF amplifiers in 'modern' superhet receivers with AGC control.
The RCA logo.
The 6K7 indicates complete equivalence with the commercial valve Type.
The thin metal envelope is 25 mm in diameter and, excluding the IO base pins, is 64 mm tall.
References: Datasheet & 1040. Type VT-86 was first introduced in 1936.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
m
h
a
g2
g3
nc
h
k

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
250
125
-3
10.5
2.6
0.6M
1.65
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 18, 2012.
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