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H210

Sensibly equivalent to:
B228
See also:
Continental imports of the 1930s - The Azide Process
    
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This exhibit is labelled as a barium tube, clearly indicating an oxide cathode. The envelope also gives the heater voltage as 2.0 V and the anode voltage as 200 V. This valve is given as originally manufactured in 1929. The electrodes are pointed at an angle to the horizontal and the filament is a single 'V'.
The balloon envelope is 44 mm in diameter and, excluding the B4 base pins, is 86 mm tall.
Reference: 1043. Type H210 was first introduced in 1929.

 

Pin Connections
B4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
2.0
0.1
150
-1.5
1.0
50,000
0.7
Updated April 26, 2013.
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