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VT-132

Sensibly equivalent to:
12K8 Special
See also:
The 'Magic Three' Valves
    
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The VT-132 is the American designation of the 12K8 frequency changer. The design was as a purpose designed frequency changer. See also 6K8 that has a diagram of the special construction.
The local oscillator would produce 7.5 Volts peak to peak signal from the triode section.
The RCA logo.
The octagon with the commercial Type designation.
The thin metal tube envelope is 25 mm in diameter and, excluding the IO base pins, is 62 mm tall.
References: Data-sheet, 1040 & 1043.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
m
h
a
g2,g4
g1(t),g1
a(t)
h
k
g3

 

Absolute Maximum Operating Conditions
Hexode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
12.6
0.15
250
100
-3
2.5
6
0.6M
0.36

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
100
3.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 21, 2020.
shape:thin.metal.tube construction:glass.disc type:triode.hexode age:1930.1940 base:io heater:12.6v pins:8 pin:1.m pin:2.h pin:3.a pin:4.g2.g4 pin:5.g1(t).g1 pin:6.a(t) pin:7.h pin:8.k pin:tc.g3
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