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too much power?

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Old 12-23-2008, 02:46 PM   #1
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Cool too much power?

I live in Jacksonville, FL, zip 32257. I'm less than 5 miles from all the HD transmitters that broadcast on the channels I need. I've been using a Radio Shack HDTV Outdoor/Indoor Antenna Model: DA-5200 antenna mounted outdoors horizontally. The antenna is about 15 feet above ground and is mounted on the side of a brick chimney facing SE. The transmitters are to the NNE. I got the strongest signal there for the one station that I had trouble with getting a good signal strength, ABC-25.

I've had good luck with the stations that I watch the most, CBS-47, ABC-25, and NBC-12. But I've determined that my reception for WJXT (independent) - 4, and Fox-30 is poor. The signal strength as measured by my DishNetwork 722 is fine on these two channels, 70 to 99 and usually about 85, but I keep losing the picture. The signal strength varies a lot. Fox-30 broadcasts at a power level of 1000kw and WJXT-4 at 976kw.

On the other hand, I get a steady signal strength of 100 for NBC-12 which only uses 25kw. The picture is always perfect. I get similar results for ABC-25 which is now broadcasting at only 11kw.

I checked a few other stations that I never watch just to be complete, and it seems the the higher the power, the worst the reception.

I used the signal strength to determine the best position for the antenna, but maybe I need to do something different and look for a steady signal, even if it's a lower value. When the switch happens, I'm worried that all the stations will use high power and I'll have plenty of trouble.

Any suggestions that might help?

I've read quite a few posts on the great website, and used that information in setting things up, but I haven't seen anyone else with this kind of problem. I love using the antenna for local stations as this gives me a third tuner I can use to record programs in addition to the two in the Dish receiver.
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Old 12-23-2008, 02:56 PM   #2
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Default Overload??

Maybe you're so close the signals overload. Not familiar with this antenna, so if it is amplified maybe it's too much. Try cheapie rabbit ears and see if it clears up.
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Old 12-23-2008, 03:15 PM   #3
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Originally Posted by Rickfla View Post
Maybe you're so close the signals overload. Not familiar with this antenna, so if it is amplified maybe it's too much. Try cheapie rabbit ears and see if it clears up.
I started out with indoor rabbit ears, but they didn't work well enough. I seem to remember that if I unplug the amplifier, it doesn't work at all.
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Old 12-23-2008, 03:31 PM   #4
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Originally Posted by Rickfla View Post
Maybe you're so close the signals overload. Not familiar with this antenna, so if it is amplified maybe it's too much. Try cheapie rabbit ears and see if it clears up.
If there is an amp at 5 miles, I would expect overload, maybe he can try a bunch of splitters in a series to see if the signal quality improves!
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Old 12-23-2008, 03:31 PM   #5
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I started out with indoor rabbit ears, but they didn't work well enough. I seem to remember that if I unplug the amplifier, it doesn't work at all.
Can you post your tvfool?
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Old 12-23-2008, 06:19 PM   #6
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Originally Posted by Rickfla View Post
Maybe you're so close the signals overload. Not familiar with this antenna, so if it is amplified maybe it's too much.
No amplification is needed or recommended with signals that strong. You will get your best results with a "real" unamplified antenna. You may do just fine with this inexpensive model.

http://www.solidsignal.com/prod_display.asp?PROD=HBU22

But since you are running 3 tuners off of 1 antenna, I would lean toward this higher gain model.

http://www.solidsignal.com/prod_disp...p?PROD=HD7694P

Last edited by hoopitup2000; 12-23-2008 at 06:33 PM. Reason: Wrong link
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Old 12-23-2008, 06:22 PM   #7
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Your amplifier is overloaded. You need an antenna without an amplifier. Unpluging the power to the amplifier does not bypass the amplfier. Both the amplified rabbit ears that you had and the DA-5200 are the wrong antenna for you.
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Old 12-23-2008, 07:33 PM   #8
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Originally Posted by gjvrieze View Post
Can you post your tvfool?
I'll give it a shot. I was familiar with antennaweb.org, but not tvfool.
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Old 12-23-2008, 07:51 PM   #9
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i'll give it a shot. I was familiar with antennaweb.org, but not tvfool.
ouch!!
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Old 12-23-2008, 08:16 PM   #10
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overload no doubt....very strong signals there
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Old 12-23-2008, 08:20 PM   #11
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Quote:
Originally Posted by BiknSwans View Post
I live in Jacksonville, FL, zip 32257. I'm less than 5 miles from all the HD transmitters that broadcast on the channels I need. I've been using a Radio Shack HDTV Outdoor/Indoor Antenna Model: DA-5200 antenna mounted outdoors horizontally. The antenna is about 15 feet above ground and is mounted on the side of a brick chimney facing SE. The transmitters are to the NNE.
Amplifier gain of 17-23dB helps reception of weaker stations (http://www.radioshack.com/product/in...5&tab=features)

One word: OVERLOAD! You need a gain antenna with no preamp..

I would go with the http://www.solidsignal.com/prod_display.asp?PROD=HBU22 pointed around 0 degrees and you should get every station in the green with ease, and splitters will not be a problem, with LOS and those signal strengths, there is a "lot" of signal to distribute!
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Old 12-23-2008, 08:35 PM   #12
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The HBU22 is an adequate antenna for your high signal area. But, I agree with the earlier poster that recommended the Winegard 7694. It has a much better build and is stronger than the HBU22. Given your extreme weather, I'd go for the stronger, better built antenna.
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Old 01-04-2009, 06:24 AM   #13
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I decided to first try just changing the orientation of the antenna and possibly detune the signal somewhat hoping that the overload would be reduced. The label side was facing the sky and for the first try I changed it so the the label side faced the transmitters. The reception was terrific! The troublesome stations that had a high signal strength variation now come in at 100 and there is no pixelation at all. I can now watch the college bowl games and NFL playoffs in peace.

Had that not worked, I would have installed one of the antennas recommended here, but trying the easiest solution first was the right thing to do here. I thought I had read enough on the forum so that I wouldn't have to bother you guys, but I missed the possibility of overload.

I still may have to change antennas when all the stations go to full power, but I'm hoping for the best.

Thanks for your help. This is an excellent forum and I'd be lost without your knowledge and willingness to help out.
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Old 01-04-2009, 07:07 AM   #14
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Originally Posted by BiknSwans View Post
I still may have to change antennas when all the stations go to full power.
That's extremely unlikely. The analog stations will be off the air, significantly reducing the preamp overload. You might find that you can aim direct in February.
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