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Old 17-Feb-2012, 4:49 PM   #1
bkv102
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Join Date: Feb 2012
Location: Rector, PA
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Need a little reception help/advice

Please see below.

Last edited by bkv102; 18-Feb-2012 at 1:51 AM. Reason: Duplicate
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Old 17-Feb-2012, 7:11 PM   #2
bkv102
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Join Date: Feb 2012
Location: Rector, PA
Posts: 4
Signal Reception Help

Here is my tvfool report:

http://www.tvfool.com/?option=com_wr...0b86e7d4ae0680

Here is my current layout:

I have a Winegard HD8200U mounted on top of my roof via a chimney mount in the center of the roof, connected to a Winegard AP series pre-amplifier, connected to a 50 foot run of RG 6 coaxial cable, which connects to my tv inside the house.

Here is my situation:

Based on the tvfool report I should only be able to get WWCP, WJAC, and WPCW broadcasting from the Johnstown, PA direction with a rooftop antenna (red or above). I am able to get WWCP and WJAC with no trouble (WPCW no longer broadcasts on 27 from that location).

On the plus side, I am actually able to get the following stations out of Pittsburgh by aiming my antenna to the northwest: WQED 13, WPXI-DT 48, WPCW 11, WINP-TV 38. This is despite the fact that they all have NM readings on my report of -20.3 or less.

On the negative side, I cannot get KDKA-DT 25, WPMY-DT 42, WTAE-DT 51, or WBGH-DT 43, which are all coming from basically the same direction out of Pittsburgh. KDKA actually comes frome the same tower as WPCW.

At first I was thinking that maybe my antenna is just much better at grabbing Hi-VHF than UHF, hence the strong signal strengths with WPCW and WQED and almost no signal reading for KDKA and others. But then I am getting WPXI coming from nearly the exact same direction and it is UHF. The other weird thing is that KDKA, WPMY, and WBGH come in very spotty if I turn the antenna around and aim it at nearby Laurel Mountain, presumably getting the signals bounced off the ridge. But this phenomenon does not happen with any of the Pittsburgh stations that I normally get when actually aiming at Pittsburgh, such as WPXI, WQED, WINP, and WPCW.

The whole situation has me really stumped.

Here are some other things to note about my location:

My house sits near the lower part of a valley with ridges on all sides. There are two tall trees to the northwest in the direction of Pittsburgh, but I seem to be able to grab a good line of sight between them to pick up the above-mentioned channels. Also, there is a thick line of tall pines to the east and northeast, which seem to restrict me from picking up any additional Johnstown/Altoona Area broadcasts (besides WWCP and WJAC).

Can you provide any advice as far as how I can improve signal reception and/or add the additional missing channels from Pittsburgh? If not, do you have an explanation as far as why I get some and not others, and why some are bouncing off the mountain and others are not?

Do I need a different antenna that might be better suited to UHF? Is there anything available that has better UHF but still could pick up the handful of Hi-VHF channels I'm getting now? Should I just replace my antenna with separate UHF and VHF antennas for improved reception? Would messing with the antenna height make a big difference? (I've tried varying the mast height by adding or subtracting 5' sections, and it doesn't seem to matter much). What about tilting the antenna upward?

Any help you can provide is greatly appreciated!
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Old 19-Feb-2012, 7:19 AM   #3
Electron
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Tv antennas and Tv reception

I reverse engineered the location to better understand the reception situation. I am researching the Tv station/s location changes and channel changes and hills and mountains. It is complicated , I am drawing it out on paper.
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Old 19-Feb-2012, 3:33 PM   #4
bkv102
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Location: Rector, PA
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Thanks!

Thanks for looking into this, I really appreciate the help!
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Old 21-Feb-2012, 7:53 AM   #5
Electron
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Tv antennas and Tv reception

Ok , by raising the antenna height to 100 feet with the tower on the north side of the house there is a improvement in the signal strengths. KDKA 25 goes from -14.8 to -7.2 , WPMY 42 goes from -17.9 to -10.6 , WPCW 11 goes from -19 to -4.9 , WPGH 43 goes from -19.0 to -11.5. With more improvements at 125 and 150 feet. New 100 , 125 , 150 foot towers are big bucks. If I were going to do it I would find a used tower. The fold over or lay over towers are the best because antenna installation and adjustments are done standing on the ground. Yes you can try aiming the antenna that is mounted on the chimney up at the ridge toward Pittsburgh. This puts the length of the antenna in line with the signals that are scattered downward from the ridge in the direction of Pittsburgh.
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Old 24-Feb-2012, 2:26 PM   #6
bkv102
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Join Date: Feb 2012
Location: Rector, PA
Posts: 4
Thanks

Unfortunately, I don't think my wife will go for a 100 ft antenna in the backyard. But I do appreciate the advice. I'm going to try adjusting the tilt of the antenna and perhaps experiment with some temporary locations not on the roof that are on the north side of my property using a temporary pole.

After further research, it appears the stations I'm not getting are broadcasting at higher elevations (> 600m), while the ones I do get are at slightly lower elevations (500m-600m range). This may explain why I get some and not others, based on how these signals bend over the ridge before they get to me from Pittsburgh. And it could also explain why the ones broadcasting at higher elevations are successfully bouncing of the ridge behind me and giving me spotty signals, whereas the others do not.

I'll try and respond if I have any success with any new layouts.

Thanks Again!
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Old 25-Feb-2012, 3:03 AM   #7
Electron
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Tv antennas and Tv reception

You are on the right track. The way channels / frequencies , scatter , refract defract , reflect is effected buy variable factors , the density of the earth , the construction of buildings , the heights of transmitting antennas and receiving antennas , the angles of reflections , and on and on. There is phenomonon called ground wave where tv signals can be stronger at one inch to about 3 feet above ground , usually about 1 foot to 1 and 1/2 feet. Ronard at http://www.ronard.com , has tree mounts , tall straight pine trees work well , climb up the tree , clear away branches so the branches do not break up the antenna in the wind , and mount a antenna up there. There are antennas that mount at the back of the antenna like the Winegard HD9095P and Antennas Direct C5 and also others.
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