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1T5GT

 
    
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The 1T5GT is a battery audio output beam tetrode.
In single ended output service the anode load would be 14,000 Ohms. The audio output is low, but respectable for a valve operating from dry cells and having a low filament current.
The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 59 mm tall.
References: Datasheet & 1043. Type 1T5GT was first introduced in 1939.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
-
f+
a
g2
g1
-
f-
-

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
1.4
0.05
90
90
-6.0
6.5
1.5
250,000
1.15
0.17
7.5%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 21, 2013.
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