I have a non amplified antenna and a Dish. Both signals are combined, then a single wire comes into the house, which then gets split OTA/Dish at the set. I am considering buying a Radio Shack hi gain amp which has an amp at the antenna and the 2nd half of the amp is inside. In reading how this works, the amp sends some power out to the front end..antenna (as well as amps up the back end). If this unit is sending power out and the dish is also attached out there, can this damage the LNB?