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A440N

Sensibly equivalent to:
41MH 904V AC/2HL MH41
    
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The A440N from triotron is an indirectly heated detector triode introduced in 1932. The equivalents listed come from the 1936 Triotron booklet as did the data-sheet.
The balloon envelope is 46 mm in diameter, and excluding the B5 base pins is 100 mm tall.
References: Datasheet, 4046 & 1043. Type A440N was first introduced in 1932.

 

Pin Connections
B5
1
2
3
4
5
a
g1
h
h
k

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
4.0
1.0
200
-1.6
1.0
25,000
4.0
PDF scanned from an original document held by the museum
Updated March 08, 2014.
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