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Low Earth Orbit
Lighting & Electrical
AC line loss causes hum
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<blockquote data-quote="Greg Cameron" data-source="post: 82981" data-attributes="member: 42"><p>Re: AC line loss causes hum</p><p></p><p></p><p></p><p>Sure it does. Starting at page 21. You're question was, "The followup question here is why a high neutral to ground voltage causes hum. (?)"</p><p> </p><p>Page 21: "MYTH: Most Noise is Caused by “Improper” AC Power Wiring"</p><p> - Small voltages between outlet safety grounds is NORMAL in proper wiring</p><p> - Parasitic transformer effects in wiring</p><p> - Lowest between nearby outlets on the same branch circuit</p><p> - Highest (up to a few volts) between distant outlets on different branch circuits</p><p> - INTERFACE problems cause the NOISE!"</p><p></p><p>Then he goes on to explain how the interface allows the noise to occur.</p></blockquote><p></p>
[QUOTE="Greg Cameron, post: 82981, member: 42"] Re: AC line loss causes hum Sure it does. Starting at page 21. You're question was, "The followup question here is why a high neutral to ground voltage causes hum. (?)" Page 21: "MYTH: Most Noise is Caused by “Improper” AC Power Wiring" - Small voltages between outlet safety grounds is NORMAL in proper wiring - Parasitic transformer effects in wiring - Lowest between nearby outlets on the same branch circuit - Highest (up to a few volts) between distant outlets on different branch circuits - INTERFACE problems cause the NOISE!" Then he goes on to explain how the interface allows the noise to occur. [/QUOTE]
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