merry christmas everyone dedicated lines..????

hello. i have 2 dedicated lines, one for the tv and one for audio. i am having some difficulty with my AC. i'm trying to address a ground loop hum due to my cable service. however that is not my question today. how it possible, with dedicated lines, that if my wife uses a hairblower in a bathroom three floors up i get hum bars across my t.v. and a terrible buzz through my stereo. i suspect the lines are not actually dedicated. any insight would be greatly appreciated. thanks, d.
Sounds to me like you're picking up RFI (radio frequency interference) which, in this case, is being broadcast through the air, not through your AC lines. So you need to make sure all your shielding issues are in order. And, are your AC A/V circuits dedicated or not? I don't understand why you are uncertain.

It's very important that you isolate the (ground of) your cable service from the rest of the house/system. You can build yourself a cheap $4 isolator by wiring two 300-to-75 ohm adaptors back-to-back. Solder the 300 ohm twinlead sides of each adaptor to each other and cover with electrical tape or shrink tubing. Insert this device in the system by connecting your cable TV service to one side, and using a short piece of cable, the system to the other side.

You can also buy one from Audio Advisor for $100.

Merry/Happy Chrismuccah!
take the easy way out--get rid of your wife ;)
it sounds to me like you don't have dedicated lines....electricians are helpful but sometimes take the shortcut and just don't do it. if you truly have dedicated lines that have twenty amp circuits with proper use of shielded wiring from your box then you should not have any noise from anything unless the lines are lying across others and that is a no's tough to check your lines back to circuit box, but they should be labeled dedicated lines in your box for tv and audio....electricans can be helpful but harmful and you give them your careful and fully explain what you want to electricans
thanks guys. the reason i am unsure is because i cannot personally assertain whether or not they are. the electricians did not label any of their work in the box, so, short of plugging something into every outlet in the house and tripping circuit breakers one by one and seeing what turns off when, i can not know. any suggestions on what step tp take next would be greatly appriciated.
p.s. chrismuccah :)
Start tripping breakers. We've all done it sometime or other :~))
Dedicated isolated lines are not hard to install yourself.
Basically Romex wire either 14/2 for 15A or 12/2 for 20A.
Connect the wire from the main panel to only one outlet.Running the Romex through the walls is the hard part,BUT there are available special plastic or metal trucks at the Home Depot designed to hide the wire for surface runs.You do not need to hire an electrician for a job like this,you do it your self and you know for sure ,you got isolated lines.I got a few 20A lines installed myself for my system,it was fun.
One dedicated line for your audio? that means you have your digital and analog on the same "dedicated" line? You are not truly isolating. You really want a dedicated line for your analog and one for your digital. If both are on the same line, you won't be reaping the advantages of true dedication..warren :)
thanks everyone. i will try all your suggestions, work on the lines myself and start tripping breakers. i'll do like a couple rooms a day, slow and steady will win the race! anyway warren, i have the tv, dvd, and cdp, in one outlet and the anaolgue gear in the other. i think that is the correct way to set-up, yeah? thanks again all, will post results...
I didn't read your post carefully. Two dedicated lines, I see. veddy good. you're on your way to electric nirvanna.
thanks warrenh. we're workin' on it....with a little help from my friends.