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  2. Radio repeater - Wikipedia

    en.wikipedia.org/wiki/Radio_repeater

    For example, a 150 MHz hand held may communicate to a vehicle-mounted low-power transceiver. The low-power radio repeats transmissions from the portable over the vehicle's high power mobile radio, which has a much longer range. In these systems, the hand-held works so long as it is within range of the low power mobile repeater.

  3. PMR446 - Wikipedia

    en.wikipedia.org/wiki/PMR446

    Equipment used ranges from consumer-grade to professional quality walkie-talkies (similar to those used for FRS/GMRS in the United States and Canada). Depending on surrounding terrain range can vary from a few hundred metres (in a city) to a few kilometres (flat countryside) to many kilometres from high ground.

  4. Wireless Communications of the German Army in World War II

    en.wikipedia.org/wiki/Wireless_Communications_of...

    It was used with a frame antenna on various reconnaissance units. Range 10 km AM voice to 40 km CW. FuG 11: A medium-wave transceiver (receiver/transmitter) used in command tanks. It operated in the 1,130 to 3,000 kHz frequency range with a transmission power of 100 Watts. Used at the regimental command post. Range 70 km AM voice to 200 km CW.

  5. Walkie-talkie - Wikipedia

    en.wikipedia.org/wiki/Walkie-talkie

    The first handheld walkie-talkie was the AM SCR-536 transceiver from 1941, also made by Motorola, named the Handie-Talkie (HT). [9] The terms are often confused today, but the original walkie-talkie referred to the back mounted model, while the handie-talkie was the device which could be held entirely in the hand.

  6. Repeater - Wikipedia

    en.wikipedia.org/wiki/Repeater

    A radio repeater retransmits a radio signal. In telecommunications, a repeater is an electronic device that receives a signal and retransmits it. Repeaters are used to extend transmissions so that the signal can cover longer distances or be received on the other side of an obstruction.

  7. Personal radio service - Wikipedia

    en.wikipedia.org/wiki/Personal_radio_service

    Since 3 February 2004, the Infocomm Development Authority of Singapore (IDA) has allocated the 446.0–446.1 MHz frequency band for low-powered walkie-talkies on a non-interference, non-protected and shared-use basis.

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