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2. SCR-300 - Wikipedia

   en.wikipedia.org/wiki/SCR-300

   The SCR-300 operated in the 40.0 to 48.0 MHz frequency range, and was channelized. Along with other mobile FM tank and artillery radios such as the SCR-508 (20.0 to 27.9 MHz) and the SCR-608 (27.0 to 38.9 MHz), the SCR-300 marked the beginning of the transition of combat-net radio from low-HF ( high frequency ) AM/CW ( amplitude modulated ...

3. Transistor radio - Wikipedia

   en.wikipedia.org/wiki/Transistor_radio

   The typical portable tube radio of the fifties was about the size and weight of a lunchbox and contained several heavy, non-rechargeable batteries—one or more so-called "A" batteries to heat the tube filaments and a large 45- to 90-volt "B" battery to power the signal circuits. By comparison, the transistor radio could fit in a pocket and ...

4. Antique radio - Wikipedia

   en.wikipedia.org/wiki/Antique_radio

   The 32-volt system could also power other specially made appliances as well as electric lights around the farm. Other farm radios, especially from the late 1930s to the 1950s, reverted to using a large "A-B" dry cell that provided both 90 V for the tube plates and 1.5 V for the tube filaments, as did most tube-based portable radios of that era.

5. Emergency locator beacon - Wikipedia

   en.wikipedia.org/wiki/Emergency_locator_beacon

   An emergency locator beacon is a radio beacon, a portable battery powered radio transmitter, used to locate airplanes, vessels, and persons in distress and in need of immediate rescue. Various types of emergency locator beacons are carried by aircraft, ships, vehicles, hikers and cross-country skiers.

6. AN/PRC-77 Portable Transceiver - Wikipedia

   en.wikipedia.org/wiki/AN/PRC-77_Portable_Transceiver

   The AN/PRC-77 entered service in 1968 during the Vietnam War as an upgrade to the earlier AN/PRC-25.It differs from its predecessor mainly in that the PRC-77's final power amplifier stage is made with a transistor, eliminating the only vacuum tube in the PRC-25, as well as the DC-DC voltage converter used to create the high plate voltage for the tube from the 15 V battery.

7. Huge storms are coming this week: Here are 12 things to ... - AOL

   www.aol.com/lifestyle/here-are-12-things-to-have...

   Sometimes power outages can be caused by severe weather conditions, and a hand crank radio can be a last-ditch essential in emergencies. For around $20, the heavy-duty 2000mAh battery can charge ...