What you will need is a dual feedhorn capable of mounting both a
C-band LNB and a KU-band LNB. Chapparrel makes a nice one. You will need 2
coaxial cables, one from the C-band LNB and one from the KU-band LNB.
A DirecTV or ExpressVu LNB will not work for most FTA satellites; you will need a linear polarity type.
kat