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Nixie tube
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A Nixie tube, or cold cathode display, is an electronic device used for displaying numerals or other information using glow discharge.
Systron-Donner frequency counter from 1973 with Nixie-tube display
Systron-Donner frequency counter from 1973 with Nixie-tube display
Philips five digit, 120kHz electronic counter with E1T tubes for nuclear and scientific applications
Philips five digit, 120kHz electronic counter with E1T tubes for nuclear and scientific applications
The stacked digit arrangement in a Nixie tube is visible in this (stripped) ZM1210.
The stacked digit arrangement in a Nixie tube is visible in this (stripped) ZM1210.
A 2-digit seven-segment ″Panaplex″-display made by Beckman (1974)
A 2-digit seven-segment ″Panaplex″-display made by Beckman (1974)
Hot cathode
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In vacuum tubes and gas-filled tubes, a hot cathode or thermionic cathode is a cathode electrode which is heated to make it emit electrons due to thermionic emission. This is in contrast to a cold cat
Nixie tube
…amount of argon, in a Penning mixture. In later nixies, in order to extend the usable life of the device, a tiny amount of mercury was added to reduce cathode poisoning and sputtering. Although it resembles a vacuum tube in appearance, its operation does not depend on thermionic emission of electrons from a hot cathode…
A tungsten filament acting as a directly heated cathode in a low pressure mercury gas discharge lamp which emits electrons. To increase electron emiss
A tungsten filament acting as a directly heated cathode in a low pressure mercury gas discharge lamp which emits electrons. To increase electron emission, a white thermionic emission mix coating is applied on hot cathodes, visible on the central portion of the coil. Typically made of a mixture of barium, strontium, and calcium oxides, the coating is sputtered away through normal use, eventually resulting in lamp failure.
Two indirectly heated cathodes (orange heater strip) in ECC83 dual triode tube
Two indirectly heated cathodes (orange heater strip) in ECC83 dual triode tube
Glow of a directly heated cathode in an Eimac 4-1000A 1 kW power tetrode tube in a radio transmitter. Directly heated cathodes operate at higher tempe
Glow of a directly heated cathode in an Eimac 4-1000A 1 kW power tetrode tube in a radio transmitter. Directly heated cathodes operate at higher temperatures and produce a brighter glow. The cathode is behind the other tube elements and not directly visible.
SEM Image of G1 Support and G1 Wire, of a heavily used Pentode showing Barium oxide Contamination (green) from the cathode.
SEM Image of G1 Support and G1 Wire, of a heavily used Pentode showing Barium oxide Contamination (green) from the cathode.