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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 ...
A solar powered radio is a portable radio receiver powered by photovoltaic panels. [1] ... four transistors and a small battery. [2] [3] In 1954, ...
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.
Emergency Hand Crank Radio. $20 at Amazon. Koonie 10000mAh Rechargeable Portable Fan. $36 at Amazon. USB C Car Charger. $10 at Amazon. ... This one is small and mighty, offering quick relief ...
In present Freeplay radios and other products, clockwork mechanisms storing energy in a mainspring have now been replaced by small batteries charged by cheaper hand-crank generators.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.
The AN/PRC-152 Multiband Handheld Radio, is a portable, compact, tactical software-defined combat-net radio manufactured by Harris Corporation. [1] It is compliant without waivers to the Joint Tactical Radio System (JTRS) Software Communications Architecture (SCA). [2] [3] It has received NSA certification for the transmission of Top Secret data.
These small pocket-sized heaters are long-lasting and rechargeable, and can even recharge your phone on-the-go too, if necessary. They have three heat settings, up to 131-degree Fahrenheit. $27 at ...
The RCA model R7 Superette superheterodyne table radio. This is a list of notable radios, which encompasses specific models and brands of radio transmitters, receivers and transceivers, both actively manufactured and defunct, including receivers, two-way radios, citizens band radios, shortwave radios, ham radios, scanners, weather radios and airband and marine VHF radios.
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