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  2. Self-regulating heater - Wikipedia

    en.wikipedia.org/wiki/Self-regulating_heater

    A positive-temperature-coefficient heating element (PTC heating element), or self-regulating heater, is an electrical resistance heater whose resistance increases significantly with temperature. The name self-regulating heater comes from the tendency of such heating elements to maintain a constant temperature when supplied by a given voltage ...

  3. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    Line voltage thermostats are most commonly used for electric space heaters such as a baseboard heater or a direct-wired electric furnace. If a line voltage thermostat is used, system power (in the United States, 120 or 240 volts) is directly switched by the thermostat.

  4. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    Can also be used as an Audio Output tube. This is the 6.3 volt heater version of types 25L6-GT and 50L6-GT. 6X4 (EZ90) and 6X5 (EZ35) – Full-wave rectifiers with indirectly heated common cathode. Type 6X4 has a 7-pin miniature base, the 6X5 has an octal base. Based on type 84/6Z4. No longer in production.

  5. That’s Fall, Folks! Get Ready for Chilly Nights With These ...

    www.aol.com/lifestyle/best-patio-heaters-beat...

    The Best Patio Heaters. Best Overall: Solo Stove Tower Patio Heater. Best Basic: Amazon Basics Propane Patio Heater with Wheels. Best Value: Hampton Bay Standing Patio Heater with Wheels. Most ...

  6. All American Five - Wikipedia

    en.wikipedia.org/wiki/All_American_Five

    To keep the total heater voltage at around 120 V, the two output tubes would have to be 25 to 35-volt types, such as the 35L6 or 25L6. There were even a few "AA4" designs, usually midget sets, only usable in strong-signal metropolitan areas, because most had no IF amplifier (although some replaced the rectifier tube with a selenium rectifier).

  7. Electric heating - Wikipedia

    en.wikipedia.org/wiki/Electric_heating

    Electric heating is a process in which electrical energy is converted directly to heat energy. Common applications include space heating, cooking, water heating and industrial processes. An electric heater is an electrical device that converts an electric current into heat. [1] The heating element inside every electric heater is an electrical ...