Say you are a salesperson who keeps moving from one town to another. With a mobile radio, you are able to keep in touch with your head office or other sales people. This is normally installed inside the car. The radio is then connected to an antenna. You must have across these radios on taxi cabs or limousines for hire. Other industries that use such gadgets include the fire department, police, and home repair service providers. Here is some useful information on mobile radios:* A mobile radio is useful in marine vessels, aircraft, and railroad locomotives. The radio’s power needs vary depending on the platform used. A motor car’s radio requires a minimum of 12 volts while a railroad locomotive can power 30 or 72 volts. For large ships that spend many months in the open seas, base stations are mounted on the ship’s bridges for increased efficiency. One feature that distinguishes them from walkie-talkies is portability.* Generally, mobile radios refer to devices that use radio frequencies. On the other hand, the people on both ends can move around. At times, a mobile radio Melbourne salesman may interpret this to mean communication gadgets that are mounted on vehicles. Initially, only the police, army, and other security agencies were allowed to use these radios. Today you will find them in civilian hands.* Nearly every taxi company, trucking firm and security firm in Melbourne has a mobile radio in their vehicles. The portability of this device makes it highly advantageous. Its availability in retail outlets has made the cost come down significantly. This popularity and demand has led to the production of devices with advanced features. Since it is connected to the batteries of a running engine, you are assured of continued service.* One of the major concerns about any mobile radio is the farthest it can go in terms of range. Factors that affect this include efficiency of the antenna, transmitting power in the radio and nature of terrain among others. When determining the range and transmission efficiency, the device is normally tested on a flat ground, where there are few obstructions. In general terms, you would expect a 1 Watt radio to cover the equivalent of a mile. Remember, there are no obstacles.* Whenever you double the power in a mobile radio’s transmitter, you increase its range by approximately...