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41MH

Sensibly equivalent to:
CV2503
See also:
1931 Advert
    
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The 41MH is a detector triode and has external metalising. The New Process (1929) sticker suggests that this is an early version but the shouldered bulb points to mid 1930's.
See also 41MH for the original balloon envelope version.
The classic envelope is 46 mm in diameter and, excluding the B5 base pins, is 110 mm tall.
References: Datasheet & 1043. Type 41MH was first introduced in 1930.

 

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
-1.5
3.2
18,000
4.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 21, 2013.
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