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SG215

Sensibly equivalent to:
CV3702
    
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The SG215 tetrode was introduced in 1931 and was similar to the 1929 215SG. It is a screen grid or tetrode valve for RF amplification in broadcast radio receivers or the wireless as it was known at the time.
The detail photograph is of the control grid. It has the appearance of being hand made rather than the perfectly regular structure expected of a machine wound grid.
The balloon envelope is 43 mm in diameter and, excluding the B4 base pins, is 117 mm tall.
References: 1040. Type SG215 was first introduced in 1931.

 

Pin Connections
B4
1
2
3
4
tc
g2
g1
f
f
a

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
2.0
0.15
150
60
-1.5
1.5
0.25
1.5M
0.85
Updated June 17, 2012.
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