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and I want to add a separate UHF antenna for CBS (real ch. 28). what is the correct way to combine all of them? Would it be to combine the two UHF's first the go to the UHF/VHF combiner?
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I was afraid you were going to ask that question; it's not easily done. The problem is that when the same signals from the two antennas aimed in different directions arrive at the combining point they will interfere with each other if they are not in phase (arrive at the same instant). You must try it to see what happens when you combine the two UHF antennas with a splitter in reverse. Sometimes it works; sometimes not.
If you don't receive all the channels after combining that you had when the antennas were separate, then combining doesn't work for you.
Since you haven't tried combining yet, the possible solutions are perhaps premature, but you might want to do it because of the DVR+.
Any method of combining will make the Seattle signals even weaker, and you already have the handicap of an attic antenna with no preamp.
Possible solutions if combining two UHF antennas aimed in different directions doesn't work:
1. Two antenna systems and an A/B switch to select which one you want to use. It might be necessary to rescan after switching antennas unless your tuner can add a channel after scan.
2. Connect the main antenna to the TV antenna input and connect the second antenna to a separate tuner with its output connected to an aux input of the TV. This is my favorite solution.
3. If a DVR is needed for both antenna systems, have two DVRs, one for each system.
4. Order a custom filter from Tin Lee Electronics that will insert KIRO 28 CBS into the main system. The filter will be expensive and might cause some signal loss.
http://www.tinlee.com/MATV_headend.p...IGNALINJECTORS
http://www.tinlee.com/PDF/AC7-custom...kup%20Info.pdf
Forum member
mulliganman used an AC7 to insert a UHF channel into his system for his TiVo:
question regarding overamplification
signal readings before:
http://forum.tvfool.com/showpost.php...8&postcount=15
signal readings after:
http://forum.tvfool.com/showpost.php...6&postcount=21
Thanks for answering my PM. I find the green signal lines produced by the TVFOOL Interactive Map Browser very helpful when aiming an antenna.
http://www.tvfool.com/index.php?opti...pper&Itemid=90