https://www.dropbox.com/s/faxmop972rok7i1/Noise.m4a?dl=0
Sorry, bad link copy and paste. I can't change it on the original but here it is.
Sorry, bad link copy and paste. I can't change it on the original but here it is.
Anyone Know Where I should Look to Figure Out This Hum?
https://www.dropbox.com/s/faxmop972rok7i1/Noise.m4a?dl=0 Sorry, bad link copy and paste. I can't change it on the original but here it is. |
The first thing to do is to get a ground tester and use it to check the ground and polarity of all your outlets. If they all test fine, then disconnect the main cable line that feeds the home and observe if the him goes away. This should eliminate a ground loop created by your cable/ISP. Just because your outlets test fine for ground and polarity does not mean that you are gremlin free. Any house hold appliance could be causing the issue and back feed the hum into your system. I know this because my system did the same thing and I traced it back to my new cooktop. I did all of my suggestions above, installed a ground loop isolator, bought a $2500.00 surge/line conditioner: made sure the entire system is routed through it and the hum was still there. I even had my electrician rewire the cooktop which improved but did not eliminate the issue. His conclusion was that my 65 year old electrical mains is out of date and out of code and needs to have a new ground installed. Luckily, the hum only rears its ugly head when the cooktop is on so I power the the system off when cooking. I did purchase IFI AC Line Purifier for $100.00 and so far I have not heard the hum but it is only a band aid until the electrical mains can be addressed.So the lession here is that a common appliance that you do not think is a problem is the problem, finding is the hard part. |