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Charity Number: 1008250
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Patron: Lord Montagu
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MicrophoneIt is the job of the microphone to pick up sound waves, and convert them into electrical energy that the radio sets can understand and transmit. There is a button on the microphone usually labelled "Transmit", "Push To Speak" (or PTS), or "Push To Talk" (or PTT). This is used to tell the radio when to transmit. It is important that the microphone in use is compatible with the radio set it is connected to. This is not as simple as it may seem, as there are a number of different standards. To make matters worse, some different standards use the same shape plugs, only with the wires connected differently. Make sure that when you are acquiring a microphone that it will work with your set. There are three different types of microphone to match the three types of radio set. Again, these are Base Station, Mobile, and Hand Held. Base StationBase station microphones, like base station radios tend to be bigger than the rest, and often have extra features. They tend to be designed to stand on the desk while being used, rather than being held in the hand like a mobile mike. They can have features like 'mike lock', and volume controls. A Mike Lock lets an operator transmit 'hands free' for long periods, without having to keep the transmit button held down. Volume controls allow the operator to adjust the sound level of the transmission. MobileMobile microphones are designed to be small and operated by being held in the hand. Usually they have some form of clip on the back so that when not in use they can be hung up out of the way. They tend not to have the facilities of the base station microphones. Hand-HeldThere is very little to say about hand-held microphones. They tend to be build into the casing of the radio making it a self-contained unit. You can however sometimes get external (extension) microphones, which may also act as external speakers (think of the beat bobby talking into the little black box clipped to his shirt breast). As a rule these are specific to a make and model, and do not easily interchange with other radios.
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