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UX112A

 
    
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Type UX112A means a Type 112A fitted with a 'UX' style of base cap, ie. with pins rather than 'nubs' and a bayonet. The 112A was an early American directly heated detector or AF amplifier triode for small battery radios.
The load impedance would be 10,650 Ohms. However, the ratings may apply to later samples than our exhibit.
The balloon envelope is 42 mm in diameter and, excluding the UX4 base pins, is 98 mm tall.
References: Datasheet & 1043. Type UX112A was first introduced in 1937.

 

Pin Connections
UX4
1
2
3
4
f
a
g1
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
Pout
5.0
0.25
180
-13.5
7.7
4700
1.8. mu_8.5
0.28W
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 21, 2013.
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