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In the 1940s, American scientist Sidney Darlington had the idea of a VHF leaky feeder communication system. This is one of the most popular communications systems used by ham radio operators all over the world today. VHF leaky feeders are mainly used for long-distance communication, typically between base stations and mobile transceivers; they don’t offer …Read More

Mine Radio systems are a wireless communication system used in mines to transmit data between the various mine equipment such as semaphore, lighting, first aid, and location. It is also used to transmit information to other mining regions through wired or radio line transmissions.  The use of these systems has become widespread among the mining …Read More