My antenna is the largest that Radio Shack sells. The coax has a long run, about 80 ft. to get to the multiswitch, a 5x8 which services a 3lnb dish. I get good reception by routing the ota coax through the 5x8 and only get the pixellation on one local channel(Signal strength 65). I thought that an amplifier before the multiswitch would boost the signal enough to help that one channel. I will experiment with using a splitter and not going through the multiswitch and going with diplexers for the three receivers instead of the multiswitch. If I still need an amplifier, where is the best place to put it, close to the antenna, or just before the diplexers 80 ft down the line toward the receivers?-