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MSG/LA

 
See also:
Cossor MSG/HA Advert
    
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The MSG/LA is a tetrode from the early mains valve era with its 4 Volt heater and it offered a higher mutual conductance than the MSG/HA. It would be used for RF amplification in broadcast radio receivers.
The plain zinc paint on the reverse.
The screw top cap that was used until the top-hat style took over in the mid 1930s.
The balloon envelope is 44 mm in diameter and, excluding the B5 base pins, is 125 mm tall.
References: Datasheet & 1040. Type MSG/LA was first introduced in 1931.

 

Pin Connections
B5
1
2
3
4
5
tc
g2
g1
h
h
k
a

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
4.0
1.0
200
100
-1.5
5.2
1.2
0.35M
3.75
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 08, 2018.
shape:balloon construction:pinch type:tetrode age:1930.1940 base:b5 heater:4.0v pins:4 pin:1.g2 pin:2.g1 pin:3.h pin:4.h pin:5.k pin:tc.a
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