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In Reply to: RE: Line noise from tv cable? posted by Awe-d-o-file on December 07, 2014 at 13:04:26
No connection whatsoever. That's why it took so long to track it down. I unplugged the wall wart amp on the coax when originally checking, but the hum remained so I was stumped 'til I tried disconnecting everything in turn in the area...including the coax. Bingo. My neighborhood is at the end of the cable and there are amps for the cable signal each TV (3).
Follow Ups:
You (or the CATV provider) can install a single inline CATV isolator within the CATV junction box in order to affect all televisions and associated audio systems in your home. If a cable guy for the CATV provider does it, ask him to check the signal after it's installed. You may also be able to ask a CATV customer service agent over the phone to check the signal remotely if you install one yourself.
If your cable box or TV set is connected to your audio system the him can enter ad the coax ground may not be at electrical ground.
No connections between cable and audio system. I tried it once but the analogue audio was out of synch with the HDMI video on the TV.
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