On Thursday, March 22, 2012 04:41:00 PM Viesturs Lācis did opine: > Hello, guys! > > I have a total off-topic question, because this is the only place I > know to ask technical kind of questions. > > Is there any way to boost the signal of digital TV? > The thing is that at my parents' house the signal is not very good, > and pretty often lots of channels are not working due to weak signal. > The house is surrounded by hills and high trees and I do not think > that building 30-40 m tall mast is an easy and cheap thing to do, so I > was thinking if someone can suggest a way to boost the signal (and > probably filter the noise).
If an antenna mounted inline coax booster on a 125 mile rated "log- periodic" type antenna doesn't help, then your only recourse is to get it above the trees, they make a great sponge when they are greened up. Just make sure the cabling going into the house goes to within a foot or so of the dirt, drive an 8 foot ground rod into the dirt and put lightning arrestor's on all the cables so if it gets tapped, the (hopefully) only thing you'll lose is the booster on the antenna itself. I have such an antenna setup here, about 16 feet above the roof, guyed to the 4 corners of the roof. Setup for 75 ohm coax, I have an arrestor on the coax, and a telco style arrestor on each of the wires to the rotator motor. I lost the antenna in the 112 mph blow that came by and took 3 of my 5 trees down in 2010, but nothing else has been damaged so far. The bottoms of the guy wires are also grounded to that same rod. That faint thumping sound? Me, knocking on wood. ;-) I may yet have to raise mine as I am in a dead end cul-de-sac with 200 feet of hills topped with 80 foot trees within a block of me on the 2 sides that count. But it works about 99.9% of the time. FWIW, noise is not generally filterable except at the source as it can't be removed once added, best is to get the antenna above the noise makers if you can identify them. But usually, the biggest noisemaker is the loose hardware on the power poles in the street. I have been known to pester the line crews to stick a wrench on the thru bolt where the crossarm braces meet on the pole and take it up half a turn. That will often shut up a noisy pole for years. Hope this helps Viesturs, but I doubt if that is what you really wanted to hear. Sorry. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> It's no longer a question of staying healthy. It's a question of finding a sickness you like. -- Jackie Mason ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
