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MVSG

 
    
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The MVSG from Cossor has a mirror finish inside the envelope from the magnesium gettering. Externally the envelope is covered with a metallic paint to add to overall screening.
Introduced in 1932, Cossor in 1935 describe the MVSG as a special variable-mu screened grid valve. The special feature being the control of volume by altering the grid bias. It is clear that variable-mu technology was still relatively novel.
The classic envelope is 42 mm in diameter and, excluding the B5 base pins, is 120 mm tall.
References: Datasheet & 1043. Type MVSG was first introduced in 1932.

 

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
80
-1.5
7.5
0.75
0.2M
2.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 02, 2013.
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