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VT-173

Sensibly equivalent to:
1T4
    
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The VT-173 is a miniature screened pentode for dry battery operation. It was designed for radio reception and is a variable μ RF device.
The Ken-Rad name and Made in USA on a clear plastic tape stuck onto the glass.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 45 mm tall.
References: Datasheet & 1040 Type VT-173 was first introduced in 1940.

 

Pin Connections
B7G
1
2
3
4
5
6
7
f-
a
g2
ic
f-
g1
f+

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
1.4
0.05
90
67.5
0
3.5
1.5
0.5M
0.9
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 29, 2016.
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