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Old 22-May-2016, 6:31 PM   #9
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,518
Quote:
Originally Posted by bobsgarage

Latitude

As unimportant as this may seem, My neighbor who claims to know much about OTA TV looked at the aiming of my antennas.

He had his own theories about aiming and provided me with the compass. When I synched my CM9521A north and south, he thought it was off by several degrees. I stated it was square with the road, he said that that was a problem because my road Michigan Blvd is not square with longitude and latitude.

Is there a way to use google earth or other mapping program to show lines of latitude or longitude?

At any rate, it appears my best reception for Chicago is really 166 Degrees and Milwaukee 355, just as TV Fool predicts.

One thing I was trying was to focus south on WRME, but even though the WRME coverage map shows me in range, it won't come in at all. I found that interesting..

http://www.tvfool.com/?option=com_wr...-LP%26type%3dD

My TV Fool Report:
http://www.tvfool.com/?option=com_wr...51349748f48220

Thanks, Bob
Hi, Bob:

I think your neighbor might be a little jealous of your efforts. I hope he is taking into consideration the magnetic declination of 4 degrees. The Google map is oriented so that the top is True North. I added a grid to the satellite view and it looks square to me. The final authority would be a USGS topographic map of your area that might be at your local library.



I think the argument is unimportant because you are going to aim your antenna for best reception, no matter what azimuth it is. Signals are often skewed and can come in at the "wrong" azimuth.
As long as your rotator can repeat the same direction for you, that's all you need.
Quote:
One thing I was trying was to focus south on WRME, but even though the WRME coverage map shows me in range, it won't come in at all. I found that interesting..
WRME is on real channel 6, which is a VHF-Low channel. What antenna were you using, the MCM 30-2476 or the Radio Shack VU-210XR?

Also, if you are using an FM filter, it might be taking out part of channel 6.

Attached Images
File Type: jpg bobsgarageMichAveGrid.JPG (87.9 KB, 1785 views)
File Type: jpg bobsgarageMichAveGrid2.JPG (85.0 KB, 392 views)
File Type: jpg bobsgarageMichAveGrid3.JPG (94.7 KB, 386 views)
File Type: jpg TV CH6.jpg (63.4 KB, 1725 views)
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Last edited by rabbit73; 22-May-2016 at 7:42 PM.
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