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25L6GT

Sensibly equivalent to:
CV553 KT32
    
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The 25L6GT is designed for use in single ended audio stages in apparatus using a 300 mA series heater chain. As a single ended audio amplifier it can produce 4.3 Watts.
The Type designation can be seen faintly on the right hand side of the glass.
The wide glass envelope is 28 mm in diameter and, excluding the IO base pins, is 68 mm tall.
References: Data-sheet, 1040 & 1043. Type 25L6GT was first introduced in 1937. See also 1937 adverts.

 

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

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
25
0.3
200
110
-8
50
2
30,000
9.5
4.3W
10%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 06, 2022.
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