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Audio and Video Talk
Vinyl
The dreaded stubborn hum
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<blockquote data-quote="ludo" data-source="post: 71415" data-attributes="member: 691"><p>Is there electrical continuity between the ground wire and the arm base? There should be. If there isn't, then looping the loose ground wire back to the arm base will help, as you described. So I'm wondering if something is tarnished or loose and not connecting to the arm base/arm tube etc properly via that multipin connector. Check for resistance between the arm tube and the ground wire coming out (with the loose wire not connected to the arm base.) If you find an open circuit from the Amp side ground wire to the arm base then, the problem is somewhere in the connector or the ground wire inside the arm.</p><p></p><p>Cable impedance does not matter <u><em>at audio freq</em></u>. Coax is coax <ducks></p></blockquote><p></p>
[QUOTE="ludo, post: 71415, member: 691"] Is there electrical continuity between the ground wire and the arm base? There should be. If there isn't, then looping the loose ground wire back to the arm base will help, as you described. So I'm wondering if something is tarnished or loose and not connecting to the arm base/arm tube etc properly via that multipin connector. Check for resistance between the arm tube and the ground wire coming out (with the loose wire not connected to the arm base.) If you find an open circuit from the Amp side ground wire to the arm base then, the problem is somewhere in the connector or the ground wire inside the arm. Cable impedance does not matter [u][i]at audio freq[/i][/u]. Coax is coax <ducks> [/QUOTE]
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Audio and Video Talk
Vinyl
The dreaded stubborn hum
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