[ADTech]

You only have one desired VHF station operating on VHF 13 at heading 71° magnetic. Install the 5-element VHF antenna on a fixed aim at that heading. There is no need for it to be on the rotor. If you want to shoot for WALA out of Mobile also, tweak it a few degrees to the right. The several stations immediately to your north are all UHF. There is no point in aiming a VHF antenna at them.

Frankly, the DB8, if properly installed and with a capable pre-amp, should be able to easily receive all the Mobile UHF stations you specified. Even though the DB8 is myopic on VHF, it should readily have even received that local channel 13 signal. That suggests that there are likely details about your installation that we don't know and we're somewhat guessing in the dark, especially this bit about "The window outside my room has bushes and a tree but it is still a clear view. The window on the other side of my room has trees" makes it almost sound as if the DB8 is still indoors.

If you did not order the suggested pre-amplifier, you will still need a UVSJ to combiner the two antennas into a single coax. In a pinch, you can pick one up at most Radio Shack stores for a retail price. Cat # 15-2586.

Exercise caution with the DB8 aimed to the north with a typical pre-amp. The odds of either amplifier or tuner overload is high unless you pick one of the pre-amps designed to handle such signal levels. The signals with damage anything, but the will cause excessive distortion that will, for all intents and purposes, manifest itself on most TV sets the same as a weak signal.