Radio transmits signals from AM and FM station and antennas across the state. All radio reception is affected by distance, physical obstacles and other broadcast signals. But, most often simple enhancements can lessen the handicaps imposed on radio signals.

AM reception, which travels both on the ground and through the air, is prone to interference by a variety of sources. These sources can cause AM station signals to reflect off the ionosphere and skip over areas that receive the signal during the day.

When it comes to AM reception, not all AM/FM receivers are created equal. Some used AM/FM radios have built- in antennas while some do not. Many used AM/FM receivers have an external connection for an AM loop antenna. This might have come with the receiver when it was purchased. Whether the used AM/FM radio receives AM poorly or not at all, one needs to install this loop antenna and orient it appropriately for the best reception.

FM broadcasts deliver greater audio fidelity and are less susceptible to static. But they too, have their own reception-related challenges. Used FM radio will have the best reception when the radio waves travel in straight lines, unobstructed, to a transmitting antenna. When there are reflecting surfaces such as tall buildings or mountains near the receiving antenna, FM radio waves are prone to a disturbance known as “multi-path”.

Most used AM/FM radio receivers require an external antenna. One should ensure that the antenna one purchases is compatible with the used AM/FM radio. A car’s AM radio receiver needs an antenna to help it pick the transmitter’s radio waves out of the air. The radio receiver also requires a tuner, which will separate one wave from the thousands of radio, signals that the antenna receives. In the case of an AM radio, the detector is made with an electronic component called a diode. The AM radio next amplifies the clipped signal and sends it to the speakers.

A normal FM station transmits at thousands of watts. This level of power means that the station needs lots of expensive transmitting equipment, as well as a fairly substantial antenna. In a used FM radio, the detector is different, but everything else is the same. In a used FM radio, the detector turns the changes in frequency into sound, but the antenna, tuner and amplifier are largely the same. One can order for this either online /offline.

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