We purchased a 70 mile range antenna that is mounted about 205 is feet off the ground. It currently recives around 35 channels. We are looking to pull in channels 2 3 and 6. Currently it pulls in 6 but it is very weak and choppy. We also have an RV with an antenna and that antenna (which is amplified) and mounted probably10tish feet below the one on the house. That antenna picks up channel 2 3 and 6 with no problems at all when faced in the same direction as the one on the house. We are using the same DTV convertor box on each so the tuner is not an issue and neither is cabling as we have tried a tv right on the ground outside. Only problem icam think of is that there is a splitter which might be part of the problem. All cable from antenna is brsnd new RG-6. Does it sound like a preamp on the house antenna will help it pull in 2 3 and 6? I know a pre-amp doesn't boost the range but just the signal down the line. I'm just confused to as why the lower small antenna works better than the bigger higher one.