Look at the back of your set. If it has a separate connection for UHF, you must have a UHF antenna connected to it or else you will not receive any television station above Channel 13. When in doubt, refer to the owner's manual of your television. An important element often overlooked is the transmission line. It is the wire that carries the signal between the antenna and the television set.
Transmission lines deteriorate with age.
If your transmission line is worn-out, you may be looking at a snowy, ghosty signal even if the antenna and television are brand new. For optimum performance, a transmission line should be replaced every five years. If you are installing new transmission line, it is important to select a quality grade to minimize signal loss. Round coaxial cable and flat twin lead are the two basic types of transmission line. Twin lead cable is less expensive, but it deteriorates faster and is more susceptible to interference.