Generally, amplifiers cause more problems on DTV than they solve. The problem is not low signal, it is reflections or "ghosts". All of the digital receivers and converter boxes have a signal strength display (bar graph or number readout). Use that to check to see if your antenna is peaked up on the signals you are trying to receive. Move the antenna slightly and see if you raise the signal level at all. Are all the stations you are trying to get in the same direction? Go to www.antennaweb.org and type in your location, and it will tell you where the transmitters are in relation to you, and whether they are UHF or VHF. A huge "gotcha" in DTV is the concept of "virtual" channel numbers. The FCC made all of us "brand" our digital signal with our analog channel numbers, even though they are a different channel. For instance, the TV station I work for is channel 34, our digital assignment is channel 35, but we have to identify our digital channels as 34-1, 34-2, etc. The real problem with this is if the station has a VHF analog or original channel, and their digital assignment is a UHF channel -- then you are trying to receive UHF on a VHF antenna, which doesn"t work well. Antennaweb.org will tell you the actual RF channels you are trying to receive, and what antenna you need to use to get them.
Write me directly if you have any other questions.
Brian Hoover, Chief Engineer, WNIT PBS, South Bend, IN
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