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MSP41

Sensibly equivalent to:
CV3562
See also:
Some Important British Valves
    
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The MSP41 is a 1936 improved version of the 1933 MSP4 amplifier pentode. The total cathode current is given as 12 mA whereas the MSP4 cathode current is given as 4.3 mA.
The application was as a TV RF amplifier. This improved version was marketed but had few takers since the real requirement was for high-slope types such as the KTZ41 (which had a nominal gm of 12.0!).
Thanks to Mark from Vintage-parts for sending these images.
The classic envelope is 42 mm in diameter and, excluding the B7 base pins, is 121 mm tall.
References: Datasheet, private communication & 1043. Type MSP41 was first introduced in 1936.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
m
g1
g3
h
h
k
g2
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
gm
4.0
1.0
250
240
-4.0
3.2
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 27, 2017.
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