About Radios
Radios are communication systems that send and/or receive electromagnetic waves. Devices such as citizens’ band (CB) radios, walkie-talkies, and handie-talkies are two-way radios that can be used for interpersonal communications. Two-way radios consist of a transmitter, receiver, and antenna. They are available in mobile and base configurations. Unlike cellular phones, radios do not require a monthly contract or carry per-call charges. In the United States, two-way radios are regulated by the Federal Communications Commission (FCC) and use ultra high frequency (UHF) and very high frequency (VHF) bands. UHF radios use line-of-sight communications and repeaters. They provide better reception than CB radios, which can use either HF 27 MHz or UHF 477 MHz. VHF radios are used mainly in marine applications and by emergency personnel. VHF/UHF two-way radios are also available. Radio accessories include two-way antennas, UHF connectors, battery chargers, and external GPS receivers.
Two-way UHF radios use family radio service (FRS) and/or general mobile radio service (GMRS). In the United States, FRS radios use 14 channels (1 -14) and do not require an operator’s license. They have a maximum power level of 0.5 mW and a relatively short range. FCC regulations prevent users from modifying FRS radio transceivers and FRS antennas. GMRS radios use eight dedicated channels (15 - 22) and require an FCC operator’s license. They have a greater range than FRS radios and may be outfitted with antennas to extend their range. Most GMRS radios have power ratings of 1.0 to 5.0 W and a maximum allowable power level of 50W. FRS/GMRS hybrid or dual-service radios provide access to both the FRS and GMRS bands. They can be operated without an FCC license is only the FRS channels are used.
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Engineering Web: Radios
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Google Directory -... Radios Shopping > Consumer Electronics > Communications > Wireless > Radios Directory Help Search only in Radios Search the Web See Google, Inc. Information |
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Two-way Radios and Pagers - Business - Motorola USA TWO-WAY RADIOS - PUBLIC SAFETY Digital Mobile Radios Digital Portable Radios Dispatch Infrastructure |
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MOTOTRBO Portable Radios This versatile portfolio provides a complete system of portable radios, mobile radios, repeaters, accessories, applications and services--a complete |
Part Numbers for Radios
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| AUXBOX | Amazon | PAC | Automotive Parts and Accessories | DUAL AUXILIARY AUDIO INPUT |
| PI75 | Amazon | Schumacher | Automotive Parts and Accessories | Schumacher PI-75 75 Watt Power Inverter with Flexible Neck |
| E93BP-4 | Newark | ENERGIZER | All Supplier Direct Ship | Energizer Alkaline Battery, Size: C, Features: 100 % mercury free, recommended for heavy drain, frequently used devices including portable radios, flashlights and motorized toys, Quantity: 4 |
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