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indirectly heated cathode [1 record]

Record 1 2011-08-25

English

Subject field(s)
  • Vacuum Tubes (Electronics)
CONT

Hot cathodes may be either directly heated, where the filament itself is the source of electrons, or indirectly heated, where the filament is electrically insulated from the cathode; this configuration minimizes the introduction of hum when the filament is energized with alternating current. The filament is most often made of tungsten. With indirectly heated cathodes, the filament is usually called the heater instead. The cathode for indirect heating is usually realized as a nickel tube which surrounds the heater.

OBS

indirectly heated cathode: term officially approved by the Electronics and Telecommunications Terminology Committee.

French

Domaine(s)
  • Tubes et lampes (Électronique)
OBS

cathode à chauffage indirect : terme uniformisé par le Comité d’uniformisation des termes de l’électronique et des télécommunications (CUTEL).

Spanish

Campo(s) temático(s)
  • Tubos de vacío (Electrónica)
DEF

Cátodo llevado a alta temperatura por un procedimiento distinto al paso de corriente por él.

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