AVS Special Member
Join Date: Sep 2006
Location: Long Island and Upstate NY
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The 4220 is not really going to help because it is a UHF only antenna. And KWWL 7 is a VHF channel that is a weak signal down on your tvfool list.
Obviously the best thing to do would be to get a more conventional VHF/UHF antenna and mount outside, but given that you do not want to really put too much money or time into this project, I would try moving your homemade antenna around in the attic and find a sweet spot. The higher you go, the better. And try to point the antenna to the NNW.
To get KWWL more reliably, maybe you can add a VHF rabbit ears to your UHF antenna, and join them with a combiner. But keep in mind KWWL is 51 miles away at 1 edge reception ( signal has to bend over a hill). So it is a lot to ask for an indoor antenna. Thats why putting it outdoors would at the very least increase chances of better reception.