[Admiral]

I'm not sure what forum to post this in, but any advice would be great. I finished my setup, but I get a higher-pitched hum through all 7 speakers and the sub. When I unplug the audio cables from the DVD and VCR going into the receiver, it goes away. I used HDMI and component, etc. on the video end, but for audio I am just using RCA plugs/cable --nothing fancy yet. Could this be my problem or is it something more complicated?


Let me know if I should list components...they're all brand new and in good working order (as far as I know).


Thanks,


Jeff

 

[Diode1]

Looks like a possible ground-loop.

Do you have cable-tv connected to that VCR? or anywhere in the system?

Try and make sure the DVD & VCR are plugged into the same AC outlet as the receiver.

You may need to tie the three together via a wire connected to a case screw on the back of each.

edit:

One other area to check would be if you have old wiring within the home that really does not have polarity AC outlets, "different size blades†make sure the orientation of all AC cords/plugs of the components are similar within that outlet.

 

[Admiral]

I do have cable going into that VCR. The DVD and VCR are both plugged into the back of the receiver...maybe plugging them into the surge protector will do it?


The old wiring should not be an issue as the home is only 10 years old.


Thanks for the input!

 

[LoonyTunes]

It sounds to me like your problem could be your CATV connection. Try disconnecting your cable from your VCR (and TV if split) and see if the humm goes away. If so then what has to be done is where cable comes into the house it has a mounting block that is grounded to a different ground source than your audio gear. You will need to get the CATV connection grounded to the same source as the AC delivering power to your gear. This can also get rid of what I call "rolling bars" video noise in the TV picture that usually occurs with this ground loop problem.

 

[Admiral]

You guys were 100% correct. I unplugged the cable and the noise was gone. I really don't have a need for it anyway since I just got satellite. Thanks for the advice!



Jeff