I need a little help figuring out if I need an amplifier in my system and which one to pick. First off my zip code is 60634. AntennaWeb says I'm about 8.5 - 8.6 miles from most of the antennas. I have an old antenna mounted inside my attic. I believe it was a near fringe antenna. The longest rear element is about 9.5 - 10 feet. I have a regular roof, I assume asphalt shingles. I have 50 feet of cable connected to the antenna and then it goes into a 2 way splitter. One side of the splitter connects to my TV, which really is only being used as a monitor right now, but eventually I will replace it with a HDTV, so assume one side of the splitter going to a TV. The other side of the splitter has a 25 foot cable connected to it and then it goes to a 4 way splitter. I then have 4 TV tuner cards for computers connected to the 4 way splitter. Most of the time TV records OK, but I do get where channel 2 sometimes turns into a sort of green screen and I also sometimes get where it appears I lose some frames when recording. I have read a bunch of stuff on your site, but I'm still a little confused. I figure my signal loss to the computers as follows.
50 feet of cable -3.0dB
2 way splitter -3.5 - 4.0dB
25 feet of cable -1.5dB
4 way splitter -7.0 - 8.0dB
Total loss -15 - 16.5dB at the computers
One concern I have is if I use a preamp would I possibly have to much signal at the TV?
So, should I be using a preamp or a distribution amp, and which one? If a distribution amp, I'm kind of assuming HDA-100. But, again I'm a little confused. The HDA-200 has a gain control, so does that mean I could get an HDA-200 and turn down the gain? Also, where in the system would I place the distribution amp? Thank you.