![]() Your antenna system is the most important aspect of your station and we’ll explain how to make it as efficient as possible. In Part 3 we will cover aerials – Especially those that can work in a small (<50ft) garden or perhaps where stealth operation is your primary concern. Whether you’ve just got your licence and want to get onto HF quickly, or have been active on 2m for a while and want to “take the plunge” into HF, then this article should help you get to know what to expect from the bands and how to get the most out of your station. This article is split into 3 parts:” The HF Bands“, “ Choosing a Radio“, and “ Aerials.” The content here is primarily aimed at the Foundation/Intermediate licence-holder, therefore a number of topics (especially those surrounding propagation) have been kept “simple” on purpose. If you cannot determine what service the unit may be used in, contact HQ98 for more information.The following is the first part of a three-part guide to help get started with HF, written by Charlie Davy – M0PZT The manual that comes with the radio, or the label placed on it by the manufacturer, should indicate the service the unit is certified for. NOTE: Radios marketed as "FRS/GMRS" or "dual-service radios" are available from many manufacturers. GMRS radios generally transmit at higher power levels (1 to 5 watts is typical) and may have detachable antennas. FRS radios have a maximum power of ½ watt (500 milliwatt) effective radiated power and integral (non-detachable) antennas.If you operate a radio under the rules that apply to GMRS, you must have a GMRS license. If you operate a radio that has been approved exclusively under the rules that apply to FRS, you are not required to have a license. A license for a GMRS system is usually issued for a 5-year term. Any individual in the United States who is at least 18 years of age and not a representative of a foreign government may apply for a GMRS license by completing the application form (either on paper or through the FCC's Universal Licensing System) and paying the license fee (currently $85.00). If you are purchasing a two way radio that operates using GMRS frequencies and plan to use it within the United States, the Federal Communications Commission (FCC) requires that you register for a GMRS license. ![]() NOTE: FCC required all CFR 47 Part 90 VHF (150-174 MHz) and UHF (421-512 MHz) PLMR (Private Land Mobile Radio) licensees operating legacy wideband (25 kHz bandwidth) voice or data/SCADA systems to migrate to narrowband (12.5 kHz bandwidth or equivalent) systems] before 1/1/13. There are also a number of specific frequencies, in both the VHF and UHF spectrum, that are for business use some of these have color-coded names, such as Blue Dot or Red Star. The electromagnetic spectrum between approximately 450 and 470 MHz is used largely for UHF business communications, although this spectrum is not exclusively for business use. The exceptions to this are five specific frequencies that are also part of the Multi-Use Radio Service, which permits unlicensed operation on these frequencies, provided the output power does not exceed 2 watts. In the United States, private use of these frequencies requires a federal license issued by the U.S. They are reserved for use by businesses, and in some cases, by individuals. These are legal for use in this service as long as they are GMRS type-approved.īRS - Business Radio Service describes a series of frequencies on the VHF and UHF two-way radio bands. Mobile and base station-style radios are available as well, but these are normally commercial UHF radios as often used in the public service and commercial land mobile bands. These radios are typically handheld portable devices much like Family Radio Service (FRS) radios, and share some frequencies with FRS. Immediate relatives of the GMRS system licensee are entitled to communicate among themselves for personal or business purposes, but employees of the licensee, who are not family members, are not covered by the same license. It is intended for use by an adult individual who possesses a valid GMRS license, as well as his or her immediate family members. and more to use.GMRS - General Mobile Radio Service is a licensed land-mobile FM UHF radio service in the United States available for short-distance two-way communication. Pair of MR350-R Talkabout 2-way Radios designed for the outgoing, camper, hunter, family, group.
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