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UCH11

 
    
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The UCH11 is a triode hexode mixer from 1939. The triode oscillator section is internally connected to the mixer for LO injection.
The central spigot has broken off revealing the metal evacuation tube and seal.
The steel shell with rust.
The date seems to be 1944. The BAL 1790 indicates the inspection centre. Wehrmacht was employed between 1936 and 1945.
The wide glass tube envelope is 36 mm in diameter, and excluding the Footless base pins is 39 mm tall.
References: Datasheet & 3002. Type UCH11 was first introduced in 1939.

 

Pin Connections
Footless
1
2
3
4
5
6
7
8
g2,g4
g1
k,m
a
h
h
g3,g1(t)
a(t)

 

Absolute Maximum Operating Conditions
Hexode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
20.0
0.1
200
200
-18
2.5
3.0
1.9
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 27, 2019.
shape:wide.metal.tube construction:glass.disc type:triode.hexode age:1930.1940 base:footless heater:100ma pins:8 pin:1.g2.g4 pin:2.g1 pin:3.k.m pin:4.a pin:5.h pin:6.h pin:7.g3.g1(t) pin:8.a(t)
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