There are a few possible reasons why your headshell might hum when you touch the cartridge. Here are some of the most common causes:
- The cartridge is not properly grounded. The cartridge should be grounded to the headshell to prevent it from picking up electrical noise. If the cartridge is not properly grounded, it can create a hum when you touch it.
- The RCA cables are not properly shielded. The RCA cables that connect the turntable to the amplifier or receiver should be properly shielded to prevent them from picking up electrical noise. If the RCA cables are not properly shielded, they can create a hum when you touch the cartridge.
- There is a ground loop. A ground loop is a condition that occurs when there are multiple devices connected to the same power outlet. This can create a loop of electricity that can cause a hum. If you are experiencing a ground loop, you can use a ground loop isolator to break the loop and eliminate the hum.
- The cartridge is defective. In rare cases, the cartridge itself may be defective and causing the hum. If you have tried all of the above and the hum is still there, it may be necessary to replace the cartridge.
If you are experiencing a hum when you touch the cartridge, it is important to try to identify the source of the noise. Once you have identified the source, you can take steps to reduce or eliminate the hum.
Here are some additional things to keep in mind about headshell hum:
- The hum is typically a low-frequency noise. This is because the cartridge is sensitive to low-frequency noise.
- The hum can be intermittent. This is because the noise can be caused by a variety of factors, including the position of the cartridge, the power lines, and other electronic devices.
- The hum can be difficult to eliminate completely. However, by following the tips above, you can reduce the amount of hum that is audible.
If you are experiencing a hum when you touch the cartridge, it is important to consult with a qualified technician to diagnose the problem and find the best solution.
