Video Asylum

RE: Switched from DirecTV to Comcast - got loud humming

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Sondek

In Reply to: RE: Switched from DirecTV to Comcast - got loud humming posted by erik on December 23, 2015 at 14:35:38

Very common issue with cable. I suspect you need what is called an "RF ground breaker" to isolate the cable. The link explains what's likely going on. The ground breaker should solve it.
http://www.cinemasource.com/articles/gnd_loop.pdf (Open in New Window)

Follow Ups:

Thanks for the input. - erik 05:05:54 12/29/15 (5)
The cable guy came, couldn't fix the problem, tried to blame it on my stereo. I asked him about the ground loop isolators, and he said those could help. So I ordered a couple from different brands. If they won't help I'm going to switch back to Directv.
- Does your amp have a 3 prong (grounded) plug? - David S. 08:33:29 12/29/15 (4)
  Many will jump in & cry MURDER, but a quick fix would probably to simply install a 2 prong "cheater" plug on the amp's cord. Had to do that when I used an ARC LS3 in a system attached to cable tv - the ARC was SUPER sensitive to ground issues, and the "cheater plug" brought everything back to dead silent backgrounds.
  - RE: Does your amp have a 3 prong (grounded) plug? - erik 16:58:51 12/29/15 (3)
    Just Got the the ground loop isolator thingies. They work great. No hum, no nothing.
    I don't think I'll experiment with cheater plug for now, however I appreciate your suggestion.
    - RE: Does your amp have a 3 prong (grounded) plug? - Sondek 12:10:27 01/07/16 (2)
      Thanks for reporting back. Glad to hear it did the trick and I didn't steer you wrong.
      - Thanks Sondek! - erik 15:35:56 01/07/16 (1)
        
        In Reply to: RE: Does your amp have a 3 prong (grounded) plug? posted by Sondek on January 07, 2016 at 12:10:27
        
        Those things really work great!
        
        RE: Thanks Sondek! - fantja 10:40:12 01/12/16 (0)
        
        In Reply to: RE: Thanks Sondek! posted by erik on January 07, 2016 at 15:35:56
        
        Thanks! for sharing- erik.

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