A humming receiver can be a frustrating problem. There are a few possible reasons why your receiver might be humming, and the solution will vary depending on the cause. Here are some of the most common causes of receiver hum:
- Power supply: The power supply in your receiver can sometimes cause humming. This is because the power supply can be noisy, and the noise can be amplified by the receiver’s circuitry.
- Ground loop: A ground loop is a condition that occurs when there are two or more devices connected to the same power outlet, and each device has a different ground. This can create a loop of electricity that can cause a hum.
- Interference from other devices: Other electronic devices in your home, such as computers, televisions, and fluorescent lights, can sometimes cause humming in your receiver. This is because these devices can emit electromagnetic interference (EMI) that can be picked up by the receiver’s circuitry.
- Defective components: In rare cases, a defective component in your receiver can cause humming. This is usually a problem with the power supply or the amplifier.
If your receiver is humming, it is important to try to identify the cause of the noise. Once you have identified the cause, you can take steps to reduce or eliminate the hum.
Here are some tips for reducing or eliminating receiver hum:
- Check the power supply: Make sure that the power supply in your receiver is properly grounded. You can do this by connecting the receiver to a power outlet that has a ground wire.
- Break the ground loop: If you are experiencing a ground loop, you can use a ground loop isolator to break the loop and eliminate the hum.
- Move the receiver away from other electronic devices: If other electronic devices in your home are causing interference, try moving the receiver away from these devices.
- Replace the receiver: If you have tried all of the above and the hum is still there, it may be necessary to replace the receiver.
If you are not comfortable troubleshooting the hum yourself, you can take your receiver to a qualified technician for diagnosis and repair.