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2. Our Favorite Walkie Talkies From the Trails to the Worksite - AOL

   www.aol.com/lifestyle/favorite-walkie-talkies...

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3. Walkie-talkie - Wikipedia

   en.wikipedia.org/wiki/Walkie-talkie

   There are various types of accessories available for walkie-talkies such as rechargeable batteries, drop-in rechargers, multi-unit rechargers for charging as many as six units at a time, and an audio accessory jack that can be used for headsets or speaker microphones. Newer models allow the connection to wireless headsets via Bluetooth.

4. SCR-536 - Wikipedia

   en.wikipedia.org/wiki/SCR-536

   The SCR-536 weighed 5 pounds (2.3 kg) with batteries and 3.85 lb (1.75 kg) without batteries. The unit operated in AM voice mode between 3.5 and 6.0 MHz frequency range on any one of 50 channels. Plug in crystals and coils were used to control the frequency of the receiver and transmitter. The antenna was a 40 inch telescoping rod that slid ...

5. Family Radio Service - Wikipedia

   en.wikipedia.org/wiki/Family_Radio_Service

   The Family Radio Service ( FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies around 462 and 467 MHz in the ultra high frequency (UHF) band. It does not suffer the interference effects found on citizens' band (CB) at 27 MHz, or the 49 MHz band also ...

6. Crystal radio - Wikipedia

   en.wikipedia.org/wiki/Crystal_radio

   The early earphones used with wireless-era crystal sets had moving iron drivers that worked in a way similar to the horn loudspeakers of the period. Each earpiece contained a permanent magnet about which was a coil of wire which formed a second electromagnet. Both magnetic poles were close to a steel diaphragm of the speaker.

7. Two-way radio - Wikipedia

   en.wikipedia.org/wiki/Two-way_radio

   Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...