Almost any cartridge will produce a faint noise if it is in space, not touching the LP surface, and if you then turn up the gain high enough. That is more a function of the phono stage signal to noise ratio and/or ambient electrical noise, than it is a function of the cartridge. But on the one hand you do say it only happens when the arm is resting, which fits my theory. Then you imply you hear the faint noise on your digitized copies of LPs, where the stylus must have been tracing a groove, which contradicts my theory. Which is it? The cartridge hanging in space is like an antenna which picks up stuff and then delivers it to your phono stage, which has a lot of inherent gain.
TT Hum
So... I have not noticed this through my speakers, but in headphones; I get a low hum depending on the location of my tonearm. When it’s resting it’s noticeable, but when I move it to cue the hum reduces. Basically, the closer to the center of the platter the less the hum. I have an SL1200, and the power supply is offboard so it shouldn’t be anything under the platter, there is no transformer, etc. It’s not the ground wire from the arm (Jelco SA750D) either. My PSU and everything else is on another shelf, so I can’t see it being interference, and when moving things around it doesn’t change. The only things I can think of could be some kind of weird interference from the pitch fader (that’s the only thing even near the arm's resting position) or I’ve yet to try yet another cart/headshell. Stumped. Thoughts?
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- 12 posts total
- 12 posts total