I hate to pop the bubble here, but there is no way that one ground in a cartridge is causing a hum on account of a ground loop!
You can prove this easily enough by tying the minus outputs of a stereo cartridge together- no hum will result!
If one channel is responsible for a hum, it is because there is something about that channel that makes it hum, like an open connection or something like that. I'm not denying that the hum exists, just the explanation for it is not a ground loop.
You can prove this easily enough by tying the minus outputs of a stereo cartridge together- no hum will result!
If one channel is responsible for a hum, it is because there is something about that channel that makes it hum, like an open connection or something like that. I'm not denying that the hum exists, just the explanation for it is not a ground loop.