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3D TV, High Definition Television, HDTV 4K and AV
Hi Fi section
Phono Stage noise on my amp
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<blockquote data-quote="Terryl" data-source="post: 993153" data-attributes="member: 369937"><p>I think it's a grounding issue, the shielding on audio leads are not that good of a conductor compared to a direct copper wire (insulated) from the turn table chassis to the amp chassis.</p><p></p><p>Ground loop maybe, but with both units in the same AC supply line there should not be a ground loop problem.</p><p></p><p>The input pre-amp stage on the phono inputs are very pron to picking up AC buzz or other noise from anything, even the mechanical noise from tone arms, you could have a possible mismatch in the impedance on the input to the pre-amp on the main amplifier, a line input isolator could help with this.</p><p></p><p>You could try one of these hummers.</p><p>[code]http://www.instruments4music.co.uk/di_boxes__isolators/omnitronic_stereo_phono_line_isolator/24884_p.html[/code]</p></blockquote><p></p>
[QUOTE="Terryl, post: 993153, member: 369937"] I think it's a grounding issue, the shielding on audio leads are not that good of a conductor compared to a direct copper wire (insulated) from the turn table chassis to the amp chassis. Ground loop maybe, but with both units in the same AC supply line there should not be a ground loop problem. The input pre-amp stage on the phono inputs are very pron to picking up AC buzz or other noise from anything, even the mechanical noise from tone arms, you could have a possible mismatch in the impedance on the input to the pre-amp on the main amplifier, a line input isolator could help with this. You could try one of these hummers. [code]http://www.instruments4music.co.uk/di_boxes__isolators/omnitronic_stereo_phono_line_isolator/24884_p.html[/code] [/QUOTE]
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3D TV, High Definition Television, HDTV 4K and AV
Hi Fi section
Phono Stage noise on my amp
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