I have the Sony oval dish with the multiswitch for 4 receivers. I use 2 receivers. The cable for my Zenith 1080 is about 70 or 80 feet long. The best signal I can get is 62. I also replaced all my old cable with Belden 1694A. (made a big difference). The only line amplifier I've seen (Phillips) seems to be for one lnb and for a round dish. Is there an anplifier I can use to boost my signal a little more? The 62 signal is only for Sat B, Sat a is 88. Thanks for any info.