If you will like to receive KLKN-DT 8 then do it this way , aim a Winegard YA1713 antenna with a Winegard AP3700 VHF only preamp at channel 8 , 10 and 12 will also be received. And aim the DB8 at 153 degree magnetic compass. The two antennas will be connected together with a UVSJ inside of the house at the location where all of the coax cables go to. That means that there are two separate coax , one from the DB8 and one from YA1713.
http://www.solidsignal.com/pview.asp?p=UVSJ. A VHF only - AP3700 preamp and power supply will be connected in the coax that goes from the UVSJ to the YA1713 antenna. The DB8 will not have a preamp. The line/output of UVSJ is connected to the house coax system at the place where all the coax go to.