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Old 4-Feb-2011, 1:04 PM   #18
Dave Loudin
Senior Member
 
Join Date: Jan 2010
Location: King George, VA
Posts: 659
Quote:
Originally Posted by bbarr View Post
I took a look at that and it seems I'm in the clear. But looking at the graph, I'm not sure if the top left corner would be the height of the transmitter and the bottom right corner my house receiving antenna?

If so, it looks like I clear the hill. Also just looking at google earth a few more times looks like I'm only having to clear about a third of the hill. It's amazing how a few houses to my left changes that up quite a bit for the worse.
Now that you're calibrated with the profiles, note that you do NOT clear the hill - check the table of your report. You're not too far over the edge and the signal strengths are strong, so you can still see plenty of signal. However, most of your paths are 1-edge.

John's antenna recommendation is meant to help you get ch. 5. You've mentioned that you don't care about that one, so we can recommend a different, smaller antenna. Focussing only on the San Antonio stations, a Winegard HD7694P or similar antenna will work. The challenge, though, is getting KPXL, the ION affiliate, licensed to Uvalde, TX. It's 70 degrees off-axis from the other San Antonio stations and the antenna you need for reliable reception will have a beamwidth of 40 to 50 degrees or so. Your best choice would be to get a rotor to aim the antenna as you need. The bonus would be having the flexibility to point at Austin if you want.

Trying to engineer a two-antenna solution for San Antonio is complex. Any UHF antenna that could see all the stations will not have enough gain to get KPXL without drop-outs. Therefore, you would have to buy an antenna like an Antennas Direct DB4 just for that station and use a special combiner called a Jointenna to add the signal into the other feed.
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