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Amateur radio operators take part in portable operations using radio equipment when traveling. "Portable" equipment indicates a configuration that allows for relatively rapid collection, transportation, and deployment of amateur radio gear. A portable station can be anything from a small QRP (Low Power) radio and antenna, to a large transceiver.
Enthusiasts operate QRP radios on the HF bands in portable modes, usually carrying the radios in backpacks, with whip antennas. Some QRPers prefer to construct their equipment from kits, published plans, [15] or homebrew it from scratch. Many popular designs are based on the NE612 mixer IC, i.e. the K1, K2, ATS series and the Softrock SDR. [16]
Used as base station antennas for land mobile radio systems such as police, fire, ambulance, and taxi dispatchers, and sector antennas for cellular base stations. Curtain array A curtain array is any one of several designs for large, directional, long-distance, broadside transmitting array antennas used at HF by shortwave broadcasting stations ...
Antennas at a ham operator's station in Chennai, India. Amateur radio or ham radio is a hobby that is practised by over 16,000 licensed users in India. [1] Licences are granted by the Wireless and Planning and Coordination Wing (WPC), a branch of the Ministry of Communications and Information Technology.
Retevis RT87 handheld radios. Retevis is the brand of chinese based company Shenzhen Retevis Technology Co., Ltd. headquartered in Shenzhen,China. [40] UHF/VHF radios: Retevis RA89 (7 Watt) Retevis RA685 (5 Watt) Retevis RT87 (5 Watt IP 66) Retevis RT95 (20 Watt mobile radio) Retevis RT3S (5 Watt DMR)
An amateur radio station incorporating two HF transceivers. A typical Yagi antenna used by a Canadian radio amateur for long distance communication Boeing 707 used a HF antenna mounted on top of the tail fin [7] The main uses of the high frequency spectrum are: Military and governmental communication systems; Aviation air-to-ground communications
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