I think your husband need to look up yagi antenna (multi element directional antenna), aperiodic log antenna (also directional antenna). These two types are what I see for rooftop antenna for regular TVs. Spacing of the elements and width are important in getting the right impedance matching for the frequency of interest. And I have no idea of how to figure all that out. It's black magic to me.
I got a pretty good chuckle on some of the contraption I saw. The coffee can. Wow I'm suprised it even picked up anything.
The old gentleman with hot side going to a dish and ground going to the chain link fence
I'm wondering if the old fashioned multi-element TV antenna for your rooftop is still useable. Not sure what frequency the new DTV is being transmitted. If its the same frequency as the old TV channels 2-7 then you should be able to use it.
KI6YMF (my call sign) smilingcat



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