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Old 17-Sep-2016, 5:37 AM   #1
SKYSCANNER
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Question Antennas Direct 91XG Signal

I have the Antennas Direct 91XG UHF long range antenna. I also use the GE 24db gain booster. I have the antenna at around 37-38' with the elevation of 663. I can get 12 channels out of Springfield Missouri that is 90 miles away consistently with no drop out on most days. I have 65-75% signal during the day and around 95% after sundown. My mother has the same setup at about 30' high but her elevation is 643 and shes approx 3 tenths of a mile away from me. She only gets 6 of the channels and 3 of them fade in and out during the daytime hours but work great after sundown. She gets around 65% on 3 of them in the day and goes to above 80% some days after dark. But the main KY3 channel she wants KYTV out of Springfield Missouri she gets around 57% during the day and it don't come in most days during the daytime but works well after sundown. My question is if there is a stronger/better booster she can use that might help her out. I know height is her problem but a better booster may help. Any Ideas??
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Old 17-Sep-2016, 5:56 AM   #2
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http://www.tvfool.com/?option=com_wr...e2cbf3ce8517f7

See I get the KYTV 3.1 3.2 3.3 all day long with mine but she don't. I see its in the grey area to.
The KSPR-DT She can get them during the day its 33.1 33.2 33.3 but says 19 on the chart.
I can get all these channels all day long. But at night I get a lot of extra ones to. Like the KOZL-TV I get 27.1 27.2 27.3 I also get all the K21JS 21.1 21.2 21.3 21.4 channels. All these work in the day also some but work the best at night.
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Old 17-Sep-2016, 11:31 AM   #3
Jake V
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Welcome, Skyscanner!

There is a warning on your TV Fool plot that the address was only resolved to the block level. That means it may or may not be accurate. I recommend preparing and posting a new TV Fool Report using the following directions: http://forum.tvfool.com/showthread.php?t=14508

Jake
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Old 17-Sep-2016, 2:56 PM   #4
SKYSCANNER
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30' and 40' Map it.

http://www.tvfool.com/?option=com_wr...e2cbc99eb003e9 30'

http://www.tvfool.com/?option=com_wr...e2cb95efa03c57 40'

KYTV 44 3.1 NBC is the main channel my mother is wanting to get.

Last edited by SKYSCANNER; 17-Sep-2016 at 2:58 PM.
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Old 17-Sep-2016, 3:13 PM   #5
rabbit73
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Is the report you gave in post #2 for your location and the reports you gave in post #4 for HER location?

Are there any trees or buildings in the signal path at her location?
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Old 17-Sep-2016, 3:22 PM   #6
SKYSCANNER
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Quote:
Originally Posted by rabbit73 View Post
Is the report you gave in post #2 for your location and the reports you gave in post #4 for HER location?

Are there any trees or buildings in the signal path at her location?
Post 2 is just general area location. Post 4 is her exact location at 30' and 40' antenna height. We live in middle of nowhere there are trees everywhere. No buildings.
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Old 17-Sep-2016, 3:27 PM   #7
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http://www.tvfool.com/?option=com_wr...e2cbda3de2d911
This is my location at 38' antenna height. But my elevation is 20' higher than hers.
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Old 17-Sep-2016, 3:32 PM   #8
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Thank you. I will study it and try to find a useful suggestion.

I will try to run a terrain profile derived from the report. If it isn't helpful, I might ask for the coordinates of her antenna in a PM from you if are willing.
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Old 17-Sep-2016, 3:37 PM   #9
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Her report, ending 3C57, shows KYTV NM -4.1 dB at 40 ft.

Your report, ending d911, shows KYTV NM -10.0 dB at 38 ft.

Am I reading that right?
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Old 17-Sep-2016, 3:43 PM   #10
SKYSCANNER
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Quote:
Originally Posted by rabbit73 View Post
Her report, ending 3C57, shows KYTV NM -4.1 dB at 40 ft.

Your report, ending d911, shows KYTV NM -10.0 dB at 38 ft.

Am I reading that right?
Yes but I have no idea what that means.
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Old 17-Sep-2016, 5:02 PM   #11
rabbit73
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The strength of a signal on the tvfool report is given in two ways.

The first way shown is the Noise Margin, or NM for short. The TVFOOL FAQ says that a signal must have a NM of at least zero to be received, but you can add the antenna gain to make the NM more positive.

Both of the NMs are negative, so the -10.0 dB signal is weaker.

FAQs here:
http://www.tvfool.com/index.php?opti...ask=view&id=57

The signal Power in dBm is another way to state the strength of a signal, and can be measured with a signal level meter. Most tuners require a signal to be at least -85 dBm, but you can also add the antenna gain and the preamp gain to make it more positive (less negative) if it is weaker than -85 dBm on your report.
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Last edited by rabbit73; 17-Sep-2016 at 5:07 PM.
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Old 17-Sep-2016, 5:12 PM   #12
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Quote:
This is my location at 38' antenna height. But my elevation is 20' higher than hers.
The tvfool report takes elevation into consideration, but not trees
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Old 17-Sep-2016, 5:16 PM   #13
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I see you just started another thread. Is it for her location, your location, or for someone else?

Antenna and Booster Suggestions?
http://forum.tvfool.com/showthread.php?t=16096
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Old 18-Sep-2016, 12:21 AM   #14
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OK, I answered your other thread and am back on this one. I think I figured out where your mom is in Wideman. The satellite photo shows trees, but there are no leaves because of when the photo was taken. Trees block UHF signals:
http://www.hdtvprimer.com/antennas/siting.html
scroll down to Trees and UHF

Her location is on the extreme fringe of KYTV coverage:



a closeup shows that her location is in a dead zone for the KYTV signal. Purple is very weak; no color is even weaker.



The terrain profile shows the interference from the curvature of the earth and the rough terrain.

Attached Images
File Type: jpg SKYSCANNERTVFcovKYTV.JPG (129.0 KB, 632 views)
File Type: jpg SKYSCANNERTVFcovKYTVcu.JPG (65.8 KB, 619 views)
File Type: jpg SKYSCANNERTVFp2KYTV.JPG (110.9 KB, 603 views)
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Last edited by rabbit73; 18-Sep-2016 at 12:27 AM.
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Old 18-Sep-2016, 12:42 AM   #15
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To improve her chances of better NBC reception, I suggest the 91XG with the front tilted up 5 to 10 degrees by trial-and-error testing, aimed at 323 degrees magnetic, and a Channel Master 7777 preamp. The antenna must be mounted in a location that does not block the signal with trees.

If the antenna is outside, the coax shield should be grounded with a grounding block that is connected to the house electrical system ground with 10 gauge copper wire for electrical safety and to reject interference. For further compliance with the electrical code (NEC), the mast should also be grounded in a similar manner to drain any buildup of static charge which will tend to discourage a strike, but the system will not survive a direct strike.

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Last edited by rabbit73; 18-Sep-2016 at 12:47 AM.
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Old 18-Sep-2016, 1:13 AM   #16
rabbit73
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Here is the Longley-Rice coverage map for KYTV on the FCC contour map for her area. Red color is very weak; no color is even weaker. Source link:
http://www.rabbitears.info/contour.p...2.941138888889

Attached Images
File Type: jpg SKYSCANNERTVFcovKYTVcu2.JPG (88.2 KB, 586 views)
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Old 18-Sep-2016, 1:35 AM   #17
rabbit73
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SKYSCANNER

Please let us know how it works out on this same thread.

Best regards,
rabbit
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Last edited by rabbit73; 18-Sep-2016 at 1:50 AM.
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Old 18-Sep-2016, 3:23 AM   #18
SKYSCANNER
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Quote:
Originally Posted by rabbit73 View Post
I see you just started another thread. Is it for her location, your location, or for someone else?

Antenna and Booster Suggestions?
http://forum.tvfool.com/showthread.php?t=16096
Yes this is all together a different location. Its around 20 miles closer to the transmitters. Step dads place. You are correct on my mothers place. Thanks for the enlarged maps. I gotta figure out how to use the maps and tools better.

Last edited by SKYSCANNER; 18-Sep-2016 at 12:49 PM.
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Old 20-Sep-2016, 1:04 AM   #19
Nascarken
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We'll I had the same problem with the antennas Direct 91XG I firest used a channel master 7778 I Wood get. A CHANNEL 85Miles ALL night till 11:am loose IT in till 6pm so then I bought the channel master 7777amp and then I received ALL channels day or night with no dropouts
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Old 20-Sep-2016, 3:50 PM   #20
SKYSCANNER
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Originally Posted by Nascarken View Post
We'll I had the same problem with the antennas Direct 91XG I firest used a channel master 7778 I Wood get. A CHANNEL 85Miles ALL night till 11:am loose IT in till 6pm so then I bought the channel master 7777amp and then I received ALL channels day or night with no dropouts
Thanks for the info!!
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