Im going to put up a RS Ground plane 25-1.3GHZ 30' up on the tower for the 700-800Starcom system here in IL. It is 75 ohm but i use plain RG6U with a 30' run with the same antenna in a attic and it works great, this will be a 50' run. Any one using Quad Shield on here for 800, its used in the "Dish Field'.....Gettin tooo old to drag the heavy stuf up the tower=Thank You