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The Type 47 is an audio output pentode delivering up to 2.7 Watts.
The classic envelope is 49 mm in diameter, and excluding the UX5 base pins is 106 mm tall. The base is 35 mm in diameter.
References: Datasheet & 1043. Type 47 was first introduced in 1936.

 

Pin Connections
UX5
1
2
3
4
5
f+
a
g1
g2
f-

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
rk
rl
Pout
2.5
1.75
250
250
-16.5
31.0
6.0
60,000
2.5
450
7,000
2.7W
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 07, 2013.
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