Advertisements When I got my Bolt I put an antenna in my garage attic and ran about 60 ft of double shielded coax to my Bolt. I'm about 55 miles from transmission towers. I got the channels I expected but sometimes there would be pixilation, particularly bad on a couple channels. I had not realized that the signals were so low powered that the 60 ft of coax was hurting things. Did some reading up on preamps, glad I did, first obvious thing, you want your preamp as close to the antenna as possible, rather than something near your tv. So I bought a preamp and connected it to the antenna with 1.5 ft double shielded coax, then connected the 60 ft cable to that. At the tv I installed the power source for the preamp, have no idea how that works, and power source is also a cell filter to remove cell phone signals. The preamp has a little led on it so you can tell you're getting power to it. Made a big difference in the signals getting to my Bolt. Hoping it solves the pixilation issues. Will follow up.