Radio transceiver interference and noise

A discussion of various sources of noise and interference, things that degrade your ability to listen to other stations on your radio transceiver.

intermod

Intermod is short for intermodulation. Intermodulation is a source of interference that arises from the combination of two or more signals at different frequencies in some kind of non-linear system. For example, you could hear strong interference at 14.0 MHz if there are two strong signals at 86.0 and 100.0 MHz that combine in a rectifying circuit, such as an oxidized fence connection or a gutter.

power line noise

Power-lines or associated hardware improperly generate unwanted radio signals that override or compete with desired radio signals. Disruption of radio communications, such as amateur radio, can occur. Loss of critical communications, such as police, fire, military and other similar users of the radio spectrum can result in even more serious consequences.