Darryl,
I am interested in your comment re tubing over the Spektrum antennas also. I have been using a 10X with a Spektrum module to fly my Bobcat and Kingcat since the beginning of 2008. The Bobcat uses an AR9000 receiver with (2) remotes and the Kingcat uses an AR9100 with (4) remotes. Prior to installation I had covered all the antennas with 3mm Polyurethane clear tubing manufactured by Freelin Wade. The initial range tests on both airplanes yielded very low fade numbers on all antennas at the (30) paces as specified by Spektrum. Both airplanes are flown with Data Loggers installed and have always yielded low numbers. Prior to each flying session I conduct a simple range test at twice the recommended distance and again have always gotten low fade numbers.
However if there is some reason why the installation of this tubing might result in range loss then I will remove it. I had installed the tubing to protect the antennas and keep them straight never thinking about possible RF issues.
Al Watson