Assertion: hot cathode | /r/CapableOf | use indirect heating
Facets:
Source sentences:
text: Further improvements to hot cathodes that use indirect heating include filaments made from sintered tungsten, thorium-tungsten alloys and tantalum.
text: Hot cathodes that use indirect heating have an advantage when using alternating current, because this configuration produces less hum than a cathode that uses direct heating.
text: The filament in a hot cathode that uses indirect heating is commonly called the heater.