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What is the source of the buzzing sound heard at the receiver? How can this be avoided?

April 26, 2017avoided buzzing heard receiver sound source

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What is the source of the buzzing sound heard at the receiver? How can this be avoided?

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The receiver may hear the power supply. A slowly moving, slightly buzzing carrier heard in the receiver may be caused by the antenna being too close. As with the transmitter related noise pick up, a loose coaxial connector or a broken or a missing ground may aggravate this problem. Normally these noises will be below the background or band noise. Increase the separation between the power supply and the receiving antenna. Use an outdoor antenna. This will reduce the amount of signal picked up from the power supply and also increase the amount of the desired signal.