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Junior Varsity
New and Shocking!
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<blockquote data-quote="John Roberts" data-source="post: 16236" data-attributes="member: 126"><p>Re: New and Shocking!</p><p></p><p>The mic is probably providing a path to ground for some rouge current coming from the guitar rig,,, </p><p></p><p></p><p></p><p>Of course your good ground can still kill the guy, but I would suspect his guitar amp chassis for voltage wrt ground. </p><p></p><p></p><p></p><p>If mains wiring is flaky enough the stage outlet ground voltage differences could be enough to feel on a sweaty lip... </p><p></p><p></p><p></p><p>In these cases very rarely is the mic or mixer the source of the voltage, but it does happen occasionally. It should be quick work with a VOM to chase this down. </p><p></p><p></p><p></p><p>Obvious first measurement if between mic and his guitar... Then if you see steady AC voltage figure out where it is coming from. </p><p></p><p></p><p></p><p></p><p></p><p>JR</p></blockquote><p></p>
[QUOTE="John Roberts, post: 16236, member: 126"] Re: New and Shocking! The mic is probably providing a path to ground for some rouge current coming from the guitar rig,,, Of course your good ground can still kill the guy, but I would suspect his guitar amp chassis for voltage wrt ground. If mains wiring is flaky enough the stage outlet ground voltage differences could be enough to feel on a sweaty lip... In these cases very rarely is the mic or mixer the source of the voltage, but it does happen occasionally. It should be quick work with a VOM to chase this down. Obvious first measurement if between mic and his guitar... Then if you see steady AC voltage figure out where it is coming from. JR [/QUOTE]
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