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Join Date: Nov 2007
Posts: 1

Television Antenna and reception...

11/30/2007 4:39 PM

I've tried to do as much research as possible, and in doing so I stumbled on to this site.

I'm trying to figure out how to improve, or should I say "get any" reception at my new "home". It's an old doublewide trailer, so of course it's all metal. Anyway, I get nowhere with the rabbit ears so I started trying to figure it out. The first question is proving to be the hardest to answer...

A little background- My last residence was out in the country... way out, on a farm. Nothing around for miles. The previous tenants had used a "wireless cable" provider, and somewhere along the lines a dish network/directtv setup was there also. The coax throughout the house was connected to a "sort of dish shaped" wire antenna when I moved in, and that's what I hooked my TVs to. There was some sort of a powered amplifier inside that I went ahead and hooked up as well. I set my sets to"air" as opposed to "cable" and I was able to receive many stations, maybe twenty or so. At some point, the company came out and took the antenna down, but my reception never changed.

Long and short, I've now moved back into town and can't get squat. My new place is all wired up from a dish system as well, but I can't get but one channel and very poorly at that.

What was so different about the farm?

Was it maybe just the power amplifier?

I've also been reading about making a simple folded dipole antenna from twin lead. folded dipole

Can a guy make several lengths of the twin lead and wire them up in series ("stack" them on one transmission line) to try to bring in more wavelengths?

Thank you for any help!

-MatB

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#1

Re: Television Antenna and reception...

11/30/2007 4:55 PM

Buy an outside antenna (standard dipole array) and stick it on a pole.

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Guru
New Zealand - Member - Interested in everything- see my Profile please APIX Pilot Plant Design Project - Member - Member Engineering Fields - Electrical Engineering - Member Engineering Fields - Power Engineering - Member Engineering Fields - Civil Engineering - Member Hobbies - Musician - Autoharp and Harmonica Hobbies - Hunting - Member Hobbies - Fishing - Member

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#2

Re: Television Antenna and reception...

11/30/2007 10:00 PM

Hello MatBirch

Because we don't know where in the World you live, it is not easy to assist.

There are many formats of TV transmission, and hundreds of frequencies/channels in daily use.

As advised by bhankiii above,the easiest solution is to go to your nearest town, with your TV Set, ask a TV antenna retailer what type of antenna you need for local transmission type/frequencies.

Once you have that, and put it on a pipe or pole to elevate it, most of your troubles are over.

TV transmissions are "line-of-sight", but do refract around objects a bit.

Ghosting comes from other reflected signals, the ghosting comes from the small time delay, which is caused by the reflected signal path being longer from the Transmitter to your antenna.

Hope that assists you....

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"The number of inventions increases faster than the need for them at the time" - SparkY
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Anonymous Poster
#3

Re: Television Antenna and reception...

12/01/2007 3:05 AM

Your living in country may have actually had you closer to the TV transmitters than where you were in the city for trying to do off air pick up which is a minority of the ways people are doing it today as Febuarary 09 is comming and all digital Tx is required and the range of digital is far smaller than analog. Also you must have TV with a digital tuner as well for any pick up not just HD. You need the correct antenna for good reception oriented at the direction that the Txs are located. The dish's you encountered may have been disabled dish or direct tv units that just the coax was picking up stong off air in the area since the dish units were off. All of this is just general speculation on my part as I don't have long lat #s for your diff locations that I could look at where in your local stations TXs are and where in the grade contours you fall at your locations. There are maps that show the garde A and B signal lines for each stations Txs that would tell us with the correct Rx equipment what quality of signal you should expect and how much of the time given terraain and weather quality. There are many others sources of RF interference natural and man made that can cause a lot of poor to no reception especialy if your equipment isn't correct or even close to being what is needed. Even the length or impedance of the coax you use can have major impact to signal quality. Many a great signal is totally ruined by a person just crimping a connector on their coax causeing major impedance mismatch causing major reflections, standing wave, signal loss and many other signal distortions and loss.

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#4

Re: Television Antenna and reception...

12/01/2007 11:32 AM

google search arrl antenna book. all manner of formulas and plans for different antennas

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