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Old 22-Apr-2012, 6:03 PM   #3
GroundUrMast's Avatar
Join Date: Oct 2010
Location: Greater Seattle Area
Posts: 4,773
Reliable reception of the Atlanta stations will require even more antenna than the HBU-55.

Looking at WSB, real channel 39, the predicted signal in the air is 11.0 dB below the strength needed for reception with a 'standard' dipole connected directly to the tuner. The HBU-55 has a published gain of about 9 dBd in the UHF band, so you are theoretically 2 dB short. An Antennas Direct 91XG has published gain of 15.57 dBi (13.42 dBd) at 622 MHz which is within CH 39. On paper, this begins to put you in positive territory. {11.0 dB NM} + {13.4 dBd antenna gain} = 2.4 dB net Noise Margin at the antenna output.

I would want to give you a solution that provides at least 10 dB net NM at the antenna output, 15 dB net NM is not over-kill IMO. That means that you may have to consider a tall tower to put the antenna at an elevation with more available signal.

Then, to receive high-VHF signals, (real CH-7 through CH-13), you'd need a high-VHF antenna such as the Antennacraft Y10713 or Winegard YA1713.

The CM7777 is a good fringe area preamp. The Antennas Direct PA-18 is in the same class and has better noise performance.

Bottom line, You can improve your situation, but you need to take what some may consider 'extreme measures'. You are up against curvature of the earth, hills and vegetation all of which block your view of the transmitters in Atlanta.
If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)

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Last edited by GroundUrMast; 22-Apr-2012 at 6:15 PM. Reason: formatting
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