Hum in the turntable.

Tweakers' Asylum

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I thought I would post here since you guys tend to be more technically adept. I have a soft hum in the left channel only of my turntable which gets worse when I swing the tone arm over the platter (with or without a cartridge attached). I have a Denon DP55K which is a direct drive utilizing a quartz synchronizer.
Now here's the question -- the tonearm (Unitrac I) has a separate ground from the turntable and I cannot ground both the arm and the turntable without a very loud hum. When I measured the voltage between the two grounds with the turntable off, the difference was 16 Volts AC that drops to about 11v when I turn the turntable on (which at least explains the hum) Any ideas why I have the large AC voltage? and any solutions? Is the left channel hum related to this hum (I think the left channel hum may be RFI generated by the turntable).

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Kimber Kable

Topic - Hum in the turntable. - neolith 17:32:04 03/09/04 (1)

Re: Hum in the turntable. - IMHO 13:24:07 03/11/04 (0)

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