Hot Cathode - Transmitting Tube Hot Cathode Characteristics

Transmitting Tube Hot Cathode Characteristics

Material Operating temperature Emission efficacy Specific emission
Tungsten 2500 K 5 mA/W 500 mA/cm2
Thoriated tungsten 2000 K 100 mA/W 5 A/cm2
Oxide coated 1100 K 500 mA/W 10 A/cm2
Barium aluminate 1300 K 400 mA/W 4 A/cm2

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