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VM4V

 
    
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The VM4V is a battery variable μ RF screened grid valve for use in broadcast receivers.
The top cap follows the early 1930s pattern of a screw down connector. In this exhibit the insulated cap is missing.
The balloon envelope is 49 mm in diameter, and excluding the B5 base pins is 120 mm tall.
Reference: 1043. Type VM4V was first introduced in 1932.

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
4.0
0.1
200
100
-1.5
6.0
-
300,000
1.2
Updated April 11, 2013.
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