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UBC81

Sensibly equivalent to:
10LD13 DH119
    
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The UBC81 small double diode triode was designed for signal demodulation and AGC detection in universal mains domestic equipment. The triode section could be used for a first stage of amplification after the detection process.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 52 mm tall.
References: Datasheet & 1040. Type UBC81 was first introduced in 1954.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a
g1
k
h
h
a(d1)
s
a(d2)
ic

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
gm
μ
14
0.1
250
-1.5
5.0
1.65
70
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December19, 2012.
shape:thin.glass.tube construction:all.glass type:double.diode.triode age:1950.1960 base:b9a heater:100ma pins:9 pin:1.a pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.a(d1) pin:7.s pin:8.a(d2) pin:9.ic
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