To dmfdmf,
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is this an actual outdoor location? That would be the best. Putting an antenna right on top of an asphalt roof might not work well but you could try it. Is the area in the attic the part of the roof covered in ceramic tiles? Hmmm... that seems like its going to really block the signals inside the attic.
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Yes, the flat roof is outdoor, but it's facing South where there are fewer channels (the north side of this area is hitting the south wall of the 2nd-story part). And Yes, the attic is under the concrete-tile roof; not only that, there are lots of foil-covered air ducts and AC/FAU equipments in there too!
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Can you physically separate the antennas and use one as a DB4 for testing? Plug the TV directly into the balun for that antenna.
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When I "
tried pointing half of the DB8e at 80degT outside my front window, and lost many channels", I actually detached the 2 parts and connect the TV directly to the balun (didn't know that box houses a balun inside though). Once I conluded that a DB4 is not enough, I put them back and never decoupled them again. So I left the 2 halves coupled when trying it in the attic.
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The trick is to get a piece of 8 or 10 AWG bare copper wire and fold a loop on the end and smash it with a hammer so it makes a thin spade-type connector. Attached a straight piece of wire on each balun input measured for VHF reception.
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Ah, I see what you're doing. Sounds simple enough I will try it and let you know. What's the max thickness this VHF element can be? I have some of the more-common 12-14 AWG wire around in my garage, but not 8 or 10. I am thinking maybe I can find some aluminum sticks or something that are as thick as the bowtie elements themselve. Would that be even better?
Thank you, again.