Hum problem solved

Conversations around originating a webcast for conference, including cameras and mixers.
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Hum problem solved

Postby kwillisjr » Tue Sep 18, 2012 12:27 pm

Last week, I posted a message about problems we had with a webcast. Since then I was able to resolve all of the problems except the hum in the audio. I finally was able to determine the fix today. I attached the drain wire from the ground of the house sound mixer to the shield of the RCA connector at the communicator. Everybody who commented about it said this was not the thing to do. The installation manual for the house sound mixer said this was not the thing to do. Everything and everybody was saying don't do it so I tried everything else....and in an act of desperation attached it and the hum went away. Has anybody else had this experience?

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Postby russellhltn » Tue Sep 18, 2012 12:35 pm

My concern would be that you are shorting out half of your audio feed. What happens if you disconnect the "-" wire and just run with the "+" and shield? Is the shield even connected at the other end?
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Postby johnshaw » Tue Sep 18, 2012 12:45 pm

I had a hum problem with my original stake center (60 years old at least building) and a simple ground loop isolator from the 'Shack' got me going.
“A long habit of not thinking a thing wrong, gives it a superficial appearance of being right, and raises at first a formidable outcry in defense of custom.”
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