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6K7

Sensibly equivalent to:
CV1942 VT-86
See also:
Metal Striptease - The 'Magic Three' Valves
    
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The 6K7 is a variable-μ voltage amplifier pentode and was designed for RF and IF amplifiers in 'modern' superhet type receivers employing AGC circuitry. It dates to the mid 1930s.
It is high impedance allowing for a high Q in the tuned anode circuit.
The reverse of the steel shell has a printed Type designation.
The thin metal envelope is 25 mm in diameter and, excluding the IO base pins, is 62 mm tall.
References: Datasheet & 1040. Type 6K7 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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