Bob:
Sorry you are having trouble.
My instructions were obviously not good enough to make it clear what you needed to do. Also, your second thread asking about the CM 3412 should have been added to your original thread so that ADTech would know what you were trying to do. You didn't tell him what two antennas you were trying to combine.
What two antennas, by brand and model number, are you trying to combine?
Your original thread:
Help with antenna selection and possible options in San Diego
http://forum.tvfool.com/showthread.php?t=15686
http://www.tvfool.com/?option=com_wr...8e03afb14308f1
Quote:
Originally Posted by rabbit73
A splitter can be used in reverse as a combiner, but it doesn't always work because when the same signals arrive at the combiner they will interfere with each other if they are not in phase. In your case you should combine two antennas, one for VHF and one for UHF with a UVSJ, which is a low loss device that combines the two bands without interference.
The signal loss in an attic is difficult to predict because of differences in construction. A metal roof, aluminum thermal barrier, aluminum siding, and stucco will block signals, as will trees and other buildings.
For KFMB CBS on real channel 8 and KGTV ABC on real channel 10 install a Winegard HD7694P aimed at 230 degrees magnetic. The 7694 is a VHF/UHF combo antenna because VHF-High only antennas are now in short supply.
For KSWB, down thru KNSD, install an Antennas Direct DB4E aimed at 144 degrees magnetic.
I have selected antennas that will give a little extra gain because your 2Edge signals might have a hard time making it over the terrain obstructions. You can see the terrain profiles if you click on callsigns in your TVFOOL report.
You probably will not need a preamp, but if you run out of signal after splitting, you can replace the splitter with a distribution amp like the Channel Master 3412 or 3414.
If that doesn't work, you can move the distribution amp to the attic and remotely power it through the coax or install a preamp.
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A UVSJ is designed to combine a UHF antenna with a VHF antenna so that they don't interfere with each other.
http://www.solidsignal.com/pview.asp?p=uvsj
http://mjsales.net/products/tru-spec...ant=1198505857
http://www.radioshack.com/vhf-uhf-go...r/1502586.html
Code:
DB4e >
\
UVSJ > coax > splitter > TVs
/
7694 >
If you need more signal for two sets, replace the splitter with a CM 3412 which is an amp an splitter combined in one unit:
Code:
DB4e >
\
UVSJ > coax > CM 3412 > TVs
/
7694 >