hah at alumni
Apr 9, 2008, 4:29 PM
Post #2 of 3
(353 views)
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> mythtv folks:
>
> This is pretty much a followup to my posts in the earlier thread
> http://www.gossamer-threads.com/lists/mythtv/users/318560#318560
>
> I was waiting for spring to try moving the antenna from the attic to the
> roof in order to get better reception. Well, spring is here.
>
> To recap my setup: For tuners I have a pcHDTV 5500 and an HDHR. I had
> bought two directional UHF antennas since the "you got questions, we got
> answers" folks at Radio Shack said that's the way to go since we are
> located in between the two antenna clusters. The smart folks on this
> list suggested I'd be able to get the closer cluster out of the back of
> the directional antenna, and in fact I got just as good reception with
> one antenna pointed to the distant cluster as I did with both. So I
> took the second one out of commission.
>
> Now, I am considering putting up both antennas on the roof, but set up
> this way: Both would point to the distant cluster. One would plug into
> my 5500 and the other one (with a splitter) into the two HDHR inputs.
> This way I don't have as much splitter losses. It also makes sense
> location-wise, too, since the first logical mounting spot is near my
> mythtv box (combined FE/BE, with the 5500 PCI card), and the other
> location is nearer my home network router, where I could plop down the
> HDHR. I've already got the two antennas so all I'd be shelling out for
> is two mounting kits and a bit of RG-6, and the grounding wire, so why
> not?
>
> My question is this: These two logical spots on the roof are about 28
> feet apart. Is this far enough apart such that they will not interfer
> with each other? Does the fact that they are not merged make
> interference less of an issue? I am looking at channels ranging from 14
> to 43.
28 feet apart sounds like plenty to me, but if you are dealing with
diffraction then they may be in separate "hotspots" for various frequencies.
Here's what I consider a very authoritative source on antennas:
http://www.hdtvprimer.com/ISSUES/erecting_antenna.html
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