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VT-117

Sensibly equivalent to:
6SK7
See also:
The 'Magic Three' Valves
    
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The VT-117 is the American Government code for the commercial 6SK7 variable μ pentode. Design use is for RF and IF amplifiers in superhet receivers. The gain of the device being controlled by a negative voltage derived from rectifying the final IF signal. In this way strong signals do not overload the receive chain because the various controlled stages have their gain reduced.
The thin metal tube envelope is 25 mm in diameter and, excluding the IO base pins, is 51 mm tall.
References: Datasheet & 1040. Type VT-117 was first introduced in 1938.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
m
h
g3
g1
k
g2
h
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
250
100
-3
9.2
2.6
0.8M
2.0,
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 29, 2013.
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