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#2
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Yes, but the original poster may not have such an ideal location.
TV Fool azimuth plot: http://i44.tinypic.com/2a4wghx.jpg Was considering 3 antennae with wide reception angles pointed generally at 45, 140, 310 deg. Only 3 are LOS (15, 18, 33) Pretty flat terrain, no tall structures nearby . Top of the mast: 14 ft. agl. Thanks. -- Al, the usual |
#3
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On Sun, 31 May 2009 14:04:50 -0700, Usual Suspect
wrote: Yes, but the original poster may not have such an ideal location. TV Fool azimuth plot: http://i44.tinypic.com/2a4wghx.jpg Nice plot. Kinda looks like you'll need a rotator. The -3dB beamwidth varies from 54 to 95 degrees. At best, 3 antennas will cover 3*95 = 285 degrees. At worst, 3*54 = 162 degrees. Was considering 3 antennae with wide reception angles pointed generally at 45, 140, 310 deg. Only 3 are LOS (15, 18, 33) What are the ranges and approximate signal strengths? Looks like 18 and 33 can be covered with one antenna pointed at about 250 degrees. A second antenna at 45 degrees *MIGHT* catch the largest number of channels. However, there's no optimum location for a 3rd antenna to catch all the remaining stations. You'll probably have to pick and choose among the relatively strong ones and take what you can get. With a UHF only antenna, stations 2-13 are problematic (or impossible). If you're going to run multiple antennas, you'll probably need an antenna switch, 3 tower mounted amplifiers, and 3 coax cable runs. If you try to combine then with a power splitter, you'll get interaction between antennas and an ugly and unpredictable pattern. With an indoor antenna of any sorts, which ones can you receive (including the weak ones)? With only 4dBi of antenna gain, I don't think you'll be able to dig the ones you can't receive out of the noise. Pretty flat terrain, no tall structures nearby . Top of the mast: 14 ft. agl. They let you have a 14 ft mast and you're worried about the antenna police? Might as well go for broke. Install a real yagi antenna, tower mounted amplifier, and rotator. For the tower amp, I recommend a Channel Master 7777. http://www.channelmasterintl.com/amplifiers.html For an antenna, whatever you can find. The bigger and uglier the anenna, the better it works. See specs at: http://www.hdtvprimer.com/ANTENNAS/comparing.html If you're not sure, buy just one antenna, hang it out the window on a broom stick, and see what it does. If you're close, continue with your proposed ideas. If it looks hopeless, give up before you burn any more money. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#4
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On May 31, 11:52*am, Jeff Liebermann wrote:
On Sun, 31 May 2009 11:16:42 -0700 (PDT), wrote: On May 31, 10:06*am, Jeff Liebermann wrote: http://www.hdtvprimer.com/ANTENNAS/comparing.html Unfortunately, the SS-1000 and SS-1000 are not listed. Sure it is but it's called 'Square Shooter' Sorry, typo error. *I mean't the SS-1000 and SS-2000 (amplified). *It does list the "Sharp Shooter" which is a different indoor antenna. What's inside the SS-1000 and some really weird "gain" tests: http://www.hdtvexpert.com/pages/squareshot.htm It's antenna 'M', the Square Shooter As I said, I use it 35 miles out from Mt Wilson (Los Angeles) and have it split 4 ways - no preamps. I do have Line Of Sight (just barely) Yes, but the original poster may not have such an ideal location. And that is why I point out my line of sight condidtion at 35 miles Also, bad guess on the beamwidth. *It's 54 (channel 69) to 95 (channel 7) degrees. *Sorry. You're right, it isn't very directional but it has a reasonable front- to-back ratio. It varies with frequency. *It's only 2.6dB at channel 10. *See specs below. I don't expect it to be usable where I'm at for channels 7,9,11 and 13. I'll try it and if / when it fails, I'll tie in the VHF of the Winegard in the garage eaves. Hopefully its VHF performance will make the grade under the roof 'chaff'. If the wife would put up with the all channel garage antenna on the roof, it would certainly be fine BUT she doesn't want to look at it, hence the SS-1000 at least for the UHF. All I can say is I've been using Winegard antennas since 1974 and have found them to be well built good performers and have never been disappointed with their products. Also, any friends who took my advice were never disappointed with either the antannas OR me. I try to avoid shopping by brand. *Even the best manufacturers have their lemons and losers. *Right now, the advertising trend is to replace your existing antenna with an HD or Digital TV antenna, whatever that means. *Also, to make it look like a DBS dish, which is generally accepted by most HOA. Specs and details: * http://www.winegarddirect.com/pdf/spec_ss1000-ss2000.pdf http://www.winegarddirect.com/squareshooter-ss1000-ss2000/winegard-sq... http://www.winegarddirect.com/viewitem~p~ss-1000~d~Winegard-SS1000-Sq... I don't see much to complain about in the design and construction of this antenna. *However, whether it's suitable for the OP's location and application is unknown. -- Jeff Liebermann * * You won't find any new Sony at our house but you will find 4 Gigabyte motherboards with AMD processors, 3 old Technics receivers, 8 Advent speakers, Canon cameras and a lot of who knows what. When one of the brands falls short I'll re-evaluate but for now I'm happy. G² |
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