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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 AM/CW to low- VHF FM.

3. SCR-284 - Wikipedia

   en.wikipedia.org/wiki/SCR-284

   The Crosley Corporation of Cincinnati, Ohio manufactured the Signal Corps Set, Complete, Radio, 284 (SCR-284) that consists of the Basic Component 654 (BC-654) and associated support equipment. [ 4 ] The SCR-284 was introduced in Africa during Operation Torch and was the first radio set used for communications from the beach to the U.S. Fleet ...

4. Batteryless radio - Wikipedia

   en.wikipedia.org/wiki/Batteryless_radio

   Crystal radio receivers are a very simple kind of batteryless radio receiver. They do not need a battery or power source, except for the power that they receive from radio waves using their long outdoor wire antenna. Sharp Electronics' first electrical product was a batteryless crystal radio introduced in 1925.

5. Shortwave radio receiver - Wikipedia

   en.wikipedia.org/wiki/Shortwave_radio_receiver

   Modern Icom RC-9500 shortwave communications receiver. Modern battery-operated portable shortwave radio receivers often called world radio or world band receivers are marketed primarily to those wishing to receive international broadcasts, and are offered in a range of compact "travel size" to smaller "pocket size" units.

6. NOAA Weather Radio - Wikipedia

   en.wikipedia.org/wiki/NOAA_Weather_Radio

   Hand-held battery powered radios, suitable for use by hikers, boaters, and in emergency preparedness kits. Hand-crank portable radios that do not require AC or battery power, especially designed for use in emergency preparedness kits. Weather radio receivers integrated as an auxiliary function into other devices, such as GMRS radios, portable ...

7. Freeplay Energy - Wikipedia

   en.wikipedia.org/wiki/Freeplay_Energy

   In present Freeplay radios and other products, clockwork mechanisms storing energy in a mainspring have now been replaced by small batteries charged by cheaper hand-crank generators. [9] Freeplay Energy produces a variety of consumer devices in addition to radios, including flashlights, lanterns, mobile phone chargers, and foot-powered generators.