A weak FM signal can be caused by many things and can become a headache for those wishing to use their radios. FM signals are usually weaker when the receiver is located in a building instead of an open area. Walls and other obstacles tend to reduce the strength of the signal making it harder pick up a clear channel. However, there are some options that you can try to boost your FM signal.
Relocate the radio to a different location to find the best spot for reception. Placing the radio near a window usually offers the best signal. Move the antenna in different directions to try to find the path with the clearest signal.
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Purchase an indoor antenna and attach it according to the instructions. Upgrading your antenna can boost your signal.
Switch the "Stereo" setting to "Mono." Sometimes, it is easier for a receiver to pick up a signal in mono then in stereo. Selecting the "Mono" setting will reduce static and background noise, but it will also eliminate the two-channel sound that you are used to with the "Stereo" setting.
Attach a booster to your antenna. Boosters amplify sound and need some signal to work well. If no signal is getting through then the booster will just amplify the noise.
Mount an outdoor antenna to the roof of the building. Building walls can muffle the broadcast signal, making it difficult to receive a clear signal. Installing an outdoor antenna and pointing it to the broadcast transmitter can greatly increase the signal you receive.
Purchase a new radio that features a digital tuner instead of a dial. Digital tuners have better sensitivity and more precise tuning than a dial.