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- Dekatron abstract "In electronics, a Dekatron (or Decatron, or generically three-phase gas counting tube or glow-transfer counting tube or cold cathode tube) is a gas-filled decade counting tube. Dekatrons were used in computers, calculators and other counting-related products during the 1950s and 1960s. "Dekatron," now a generic trademark, was the brand name used by the British Ericsson Telephones Limited (ETL), of Beeston, Nottingham (not to be confused with the Swedish TelefonAB Ericsson of Stockholm).The dekatron was useful for computing, calculating and frequency-dividing purposes because one complete revolution of the neon dot in a dekatron means 10 pulses on the guide electrode(s), and a signal can be derived from one of the ten cathodes in a dekatron to send a pulse, possibly for another counting stage. Dekatrons usually have a maximum input frequency in the high kilohertz (kHz) range — 100 kHz is fast, 1 MHz is around the maximum possible. These frequencies are obtained in hydrogen-filled fast dekatrons. Dekatrons filled with inert gas are inherently more stable and have a longer life, but their counting frequency is limited to 10 kHz (1–2 kHz is more common).Internal designs vary by the model and manufacturer, but generally a dekatron has ten cathodes and one or two guide electrodes plus a common anode. The cathodes are arranged in a circle with a guide electrode (or two) between each cathode. When the guide electrode(s) is pulsed properly, the neon gas will activate near the guide pins then "jump" to the next cathode. Pulsing the guide electrodes (negative going pulses) repeatedly will cause the neon dot to move from cathode to cathode. Hydrogen dekatrons require high voltages ranging from 400 to 600 volts on the anode for proper operation; dekatrons with inert gas usually require ~350 volts. When a dekatron is first powered up, a glowing dot appears at a random cathode; the tube must then be reset to zero state, by driving a negative pulse into the designated starting cathode. The color of the dot depends on the type of gas that is in the tube. Neon-filled tubes display a red-orange dot; argon-filled tubes display a purple dot (and are much dimmer than neon).Counter (common-cathode) dekatrons have only one carry/borrow cathode wired to its own socket pin for multistage cascading and the remaining nine cathodes tied together to another pin; therefore they don't need bases with more than 9 pins.Counter/Selector (separate-cathode) dekatrons have each cathode wired to its own pin; therefore their bases have at least 13 pins. Selectors allow for monitoring the status of each cathode or to divide-by-n with the proper reset circuitry. This kind of versatility made such dekatrons useful for numerical division in early calculators.Dekatrons come in various physical sizes, ranging from smaller than a 7-pin miniature vacuum tube to as large as an octal base tube. While most dekatrons are decimal counters, models were also made to count in base-5 and base-12 for specific applications.The dekatron fell out of practical use when transistor-based counters became reliable and affordable. Today, dekatrons are used by electronic hobbyists in simple "spinners" that run off the mains frequency (50 Hz or 60 Hz) or as a numeric indicator for homemade clocks.".
- Dekatron thumbnail Dekatron.jpg?width=300.
- Dekatron wikiPageExternalLink english.html.
- Dekatron wikiPageExternalLink articleview.php?item=792.
- Dekatron wikiPageExternalLink dspin.html.
- Dekatron wikiPageExternalLink 16.html.
- Dekatron wikiPageExternalLink trade10-dekatron.htm.
- Dekatron wikiPageExternalLink cold-cathode_tube___dekatron.html.
- Dekatron wikiPageExternalLink decimal-tubes.
- Dekatron wikiPageID "11463156".
- Dekatron wikiPageRevisionID "595290630".
- Dekatron hasPhotoCollection Dekatron.
- Dekatron subject Category:Digital_registers.
- Dekatron subject Category:Switching_tubes.
- Dekatron subject Category:Vacuum_tube_displays.
- Dekatron type Artifact100021939.
- Dekatron type Conduit103089014.
- Dekatron type Gas-filledTubes.
- Dekatron type Object100002684.
- Dekatron type Passage103895293.
- Dekatron type PhysicalEntity100001930.
- Dekatron type SwitchingTubes.
- Dekatron type Tube104493505.
- Dekatron type Way104564698.
- Dekatron type Whole100003553.
- Dekatron type YagoGeoEntity.
- Dekatron type YagoPermanentlyLocatedEntity.
- Dekatron comment "In electronics, a Dekatron (or Decatron, or generically three-phase gas counting tube or glow-transfer counting tube or cold cathode tube) is a gas-filled decade counting tube. Dekatrons were used in computers, calculators and other counting-related products during the 1950s and 1960s.".
- Dekatron label "Decatrón".
- Dekatron label "Dekatron".
- Dekatron label "Dekatron".
- Dekatron label "Dekatron".
- Dekatron label "Lampa zliczająca".
- Dekatron label "Zählröhre".
- Dekatron label "Декатрон".
- Dekatron sameAs Zählröhre.
- Dekatron sameAs Decatrón.
- Dekatron sameAs Dekatron.
- Dekatron sameAs Lampa_zliczająca.
- Dekatron sameAs Dekatron.
- Dekatron sameAs m.02rdndz.
- Dekatron sameAs Q247225.
- Dekatron sameAs Q247225.
- Dekatron sameAs Dekatron.
- Dekatron wasDerivedFrom Dekatron?oldid=595290630.
- Dekatron depiction Dekatron.jpg.
- Dekatron isPrimaryTopicOf Dekatron.
