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1T4

Sensibly equivalent to:
1F3 CV785 DF91 VT-173 W17
See also:
1T4 Exploded - Brimar 6BE6, 6BA6, 6AT6, 6AQ5 & 6X4 12BE6, 12BA6, 12AT6, 35L6GT, 35W4, 6AK6, 1S5, 1U5, 3S4, 3V4, 1R5 & 1T4 Advert - Brimar 1R5, 1S4, 1S5, 3S4, 1T4 & 3V4 Advert
    
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The 1T4 is a miniature screened pentode for dry battery operation. It was designed for radio reception and is a variable μ RF device.
The Brimar version of this American design was introduced in 1949.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 45 mm tall.
References: Datasheet & 1040. Type 1T4 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 February 04, 2013.
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