I have removed the preamp and attached the antenna to just one TV and do not get 8 or 13 and 10 is iffy. The preamp was new and was left in the factory setting, so I assume the FM trap was "IN". If I switch that to "OUT", would that make a difference? One other note that I did not mention: all the TVs are probably at least 50 ft. from the antenna. There are two splitters--one on the incoming signal going to one TV and to another splitter which takes care of the other two TVs. I also cannot find a 3413 model distribution amp. They go from 3412 to 3414.
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