Also can put the DB8 on the rotor. And install a Winegard YA1713 VHF high band antenna VHF channels 7 thru 13 aimed at channel 8 at 252 degree magnetic compass , mounted in a fixed position below the DB8 and rotor. The two antennas will be connected together with a UVSJ and the AP8700 will be connected to Line/output of the UVSJ.
http://www.solidsignal.com/pview.asp?p=UVSJ