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VT-209

Sensibly equivalent to:
12SG7
See also:
Metal Striptease
    
Extras ▼

 

The American Government code of VT-209 is also the commercial 12SG7. It is a 12.6 Volt version of the 6SG7 semi-vari mu pentode except for the heater they are identical.
This exhibit is in a sorry state with the rust attacking the steel envelope. The RCA logo and production codes.
The thin metal tube envelope is 25 mm diameter, and excluding the IO base pins, is 51 mm tall.
References: Datasheet, 1040 & 1043. Type VT-209 was first introduced in 1940.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
ra
gm
12.6
0.15
250
150
-2.5
9.2
1M
4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 28, 2013.
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