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  2. Long-range Wi-Fi - Wikipedia

    en.wikipedia.org/wiki/Long-range_Wi-Fi

    A rooftop 1 watt Wi-Fi amp, feeding a simple vertical antenna on the left. Another way of adding range uses a power amplifier. Commonly known as "range extender amplifiers" these small devices usually supply around 1 ⁄ 2 watt of power to the antenna. Such amplifiers may give more than five times the range to an existing network.

  3. Wireless repeater - Wikipedia

    en.wikipedia.org/wiki/Wireless_repeater

    Most wireless repeaters (or range extenders) are purpose-built, but certain wireless routers can be flashed with custom firmware such as DD-WRT to give them a 'range extender' option. A better option for extending wireless coverage is to configure a secondary box as a wireless access point , with a wired connection between a LAN port on this ...

  4. Frequency extender - Wikipedia

    en.wikipedia.org/wiki/Frequency_extender

    In broadcast engineering, a frequency extender is an electronic device that expands the usable frequency range of POTS telephone lines. [1] It also allows high-fidelity analog audio to be sent over regular telephone lines, without the loss of lower audio frequencies . It is an extended concept of a telephone hybrid.

  5. Fan (machine) - Wikipedia

    en.wikipedia.org/wiki/Fan_(machine)

    This type of fan is used in a wide variety of applications, ranging from small cooling fans for electronics to the giant fans used in cooling towers. Axial flow fans are applied in air conditioning and industrial process applications. Standard axial flow fans have diameters of 300–400 mm or 1,800–2,000 mm and work under pressures up to 800 ...

  6. Mobile phone signal - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_signal

    A mobile phone signal (also known as reception and service) is the signal strength (measured in dBm) received by a mobile phone from a cellular network (on the downlink). Depending on various factors, such as proximity to a tower , any obstructions such as buildings or trees, etc. this signal strength will vary.

  7. Specific fan power - Wikipedia

    en.wikipedia.org/wiki/Specific_fan_power

    In reality the fan system efficiency is often in the range 0 to 60% (i.e. <); it is lowest for small fans or inefficient operating points (e.g. throttled flow or free-flow). The efficiency is a function of the total losses in the fan system, including aerodynamic losses in the fan, friction losses in the drive (e.g. belt), losses in the ...

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