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59

Sensibly equivalent to:
CV2538
See also:
Triotron 59 Box
    
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The Type 59 is an audio output valve from the 1930's that produces an output of 3 Watts single ended or up to 20 Watts as a push-pull pair.
The reverse showing the carburised anode and three wire grids.
The insulated heaters and the twin cathode tubes within the anode.
The classic envelope is 51 mm in diameter, and excluding the base pins is 117 mm tall.
References: Datasheet. Type 59 was first introduced in 1936.

 

Pin Connections
UX7
1
2
3
4
5
6
7
8
9
tc

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
2.5
2.0
250
250
-18
35.0
9.0
40,000
2.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December24, 2012.
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