Have you tried moving your phono stage around on your rack. Sometimes a few inches will cut the noise way down. Also moving the interconnects a slightly in one direction or another can help. I have mine tied off(with black sewing thread) in the quietest location available. I still have a slight hum, but at my listening position it is not too noticeable and when the music is playing it is gone. The lush sound I get from my tube phono stage makes up for it.
seek advice on hum problem from phono preamp
My EAR 834P phono pre produces quite audible hum at the speakers. It is plugged into a Noisetrapper isolation transformer, which is plugged into another big NT isolation transformer. Probably not a ground loop: cheater plug on the EAR, or anywhere else, doesn't help. Using a Grado Statement Ref cartridge, which is unsheilded and was prone to hum pickup from the motor on a Rega TT, but isn't close to the motor on Thorens TD850; TT is far from the EAR. So the hum comes from the cartridge or the phono pre. Is this just typical of tube phono pre's (meaning, a SS unit is the only real solution), the EAR834P in particular or a defect in same? can the type of tube be a factor, do I need a different cartridge, or what? would greatly appreciate suggestions.
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