[GroundUrMast]

'Bashing' the Mohu product serves little if any positive purpose... so I hope the following comes across as 'constructive criticism'.

I have not been able to find any useful technical spec's on the Mohu web site. So I'm left to speculate as to the real performance of the antenna. The Mohu web site does claim 15 dB of gain... The only credible explanation for that gain is that it is produced by the amplifier that's built into the assembly. No amplifier adds to the true gain of the antenna, and no amplifier 'pulls' signal from the air, antenna or coax.The antenna performance should be considered independent of any amplifier, but the published gain claim is clearly a combination of the antenna and amplifier performance. Mohu is not the only vendor to use such misleading statistics manipulation, but they are being just as misleading as some scam antenna peddlers when they mash antenna and amplifier gain figures together as if they are the same.

The exterior shape of the Sky leads me to believe that it simply a 2-bay UHF bow-tie design with no reflector. If this is true, one would reasonably guess that the actual antenna can not produce more than 1 or 2 dB of gain. One would also have to assume that the antenna would be bi-directional which would make it a poor choice if multi-path interference is present.

Attics are widely variable in their ability to block, reflect and absorb radio waves. They are also prone to having significant amounts of interference due to the wiring in them and proximity to the electrical and electronic equipment in the building below.

You own the Sky... So, have you tested reception with the antenna outside, clear of obstructions such as trees and structures?

If I was starting from scratch, with a report like yours, I'd not presume that attic mounting was impossible, but I would not be surprised if the results were unreliable. I'd be prepared to mount outside in the clear. Antennas such as the Winegard HD7694P and Antennacraft HBU-33 would be the smallest I'd consider using. A premium solution such as a two antenna array, consisting of an Antennas Direct DB8E + Antennacraft Y10713 would not be overkill in my opinion.