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Home Electronic Applications in Communication Diodes and Rectifiers High-Pressure Gas Thermionic Diodes
 
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High-Pressure Gas Thermionic Diodes

The trade names Tungar and Rectigon are applied to high-pressure gas diodes. They are used extensively for charging small storage-battery installations in telephone central offices. The cathodes are massive tungsten or thoriated-tungsten filaments, and they are close to a heavy graphite anode. Argon gas at a pressure of about 5 centimeters of mercury fills the tube. The gas prevents rapid evaporation of the hot filament and also reduces the space charge.

characteristics of high-vacuum and gas diodes
Figure 5. Characteristics of comparable high-vacuum and gas diodes.


Home Electronic Applications in Communication Diodes and Rectifiers High-Pressure Gas Thermionic Diodes

Last Update: 2011-05-30