The few OTA channels i get. But I also have a Channel Plus RF Modulator 5545 that inserts my cameras and DVD to my house cable. When the RCA Preamp is plugged in my cameras and DVD channels are snowy ! And I really want to have a amp to get the weaker channels Since I live in a area that doesnt allow huge or high antenna's Im using a RCA 751R antenna and its preamp I should be getting 11 channels only getting half

The antenna is 14' off the ground and is only 25' from my Cable splitter which is a OnQ with Video engine on it. Is there any amps that will bring in a signal that is showing 7% on my TV ?