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UCL83

 
    
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The UCL83 is an audio voltage amplifier triode and an output pentode. The use would have been for post detector amplification and loudspeaker driving in broadcast receivers and small VHF televisions sets. The 100 mA heater is for use with series heater chains.
The triode section is on the left with a gap to the pentode on the right. The copper support for the suppressor grid can be seen through the hole in the anode.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 49 mm tall.
Reference: Datasheet & 1040. Type UCL83 was first introduced in 1955.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a(t)
g1(t)
k(t)
h
h
a
k,g3
g2
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
gm
μ
38
0.1
170
170
-9.5
30
5.5
10

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
gm
μ
170
-1.5
1.6
2.1
82
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December10, 2013.
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