I have a HDTV and comcast high speed internet. I have not subscribed cable internet and use antenna to capture free air signals. I do not watch much TV though, so do not have any plan to pay for the cable channels. I recently moved to a new place which is surrounded by other apartments and cannot really get TV signals, means my antenna is not helping me get free air HD channels. When I connected my coax cable from TV to the point(in wall) from  where I get internet, I get all the free channels. I believe the comcast box outside the apartment is acting as an antenna. I was using 5-900 MHz 2 way splitter to get internet and the TV signals.  But the splitters stops working after approx 30 mins use. I replaced the splitter and the problem is still same. Is there any specific type splitter for such purpose. Any particular frequency range??? Guys, Please advise ...