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3DT6

 
See also:
Tung-Sol 3DT6 Box
    
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The 3DT6 pentode was designed for use as a TV sound FM demodulator and a circuit is given in the attached data-sheet. The suppressor grid is close wound so as to be used as a second control grid.
See also 17BF11 Compactron that has one pentode that is electrically similar to the 6DT6 the 6.3 Volt version of this valve.
The Tung-Sol name and Made in USA.
The anode has small notches through which the close wound g3 can be seen.
The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 47 mm tall.
Reference: Datasheet. Type 3DT6 was first introduced in 1957.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k
h
h
a
g2
g3

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
3.15
0.6
250
100
-6.0
0.22
5.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 15, 2018.
shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b7g pins:7 pin:1.g1 pin:2.k pin:3.h pin:4.h pin:5.a pin:6.g2 pin:7.g3
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