[Swampdude]

We got our radios kind of working by getting them at least 8" away from any metal objects. I did tests by blocking the OI radio with an aluminum plate and also positioning the RC radio around in the chassis (w/ and without metal nearby). It looks like if these radios are within 6-8" of aluminum they lose comm (orientation didn't seem to matter). Thats a big problem... We're looking at making a special plastic mount to get this thing up and away from everything else just to ensure a constant signal. The old radios work great no matter where you place them. However they have plastic antennas and these new ones have metal antennas. I wonder if that has anything to do with it. I think FIRST needs to let us use the previous years radios. Theres no way 2000 teams are going to be able to keep their radios in comm and away from aluminum obstructions.

ETA from the IFI Forum (and this IS the fix):
"Poor reception can also be caused from incorrect mounting and wiring. For best radio reception, follows the guidelines: 1) the RC and OI Radio Modems should be mounted high and perpendicular to the playing field. 2) Both the Radio Modem Case and the moveable Antenna should be perpendicular to the playing field. 3) The Radio Modems and DB9 Radio Modem Cables should be kept as far as possible from any High Current Wiring, Motors, and Victors ….etc. 4) The Radio Antennas should not be touching any other surface. 5) The Radio Modem Case and Antennas should not be shielded by any metal structure. 6) There should be a “Clear Line-of Sight” between the RC and OI Radio Modems case and Antenna. 7) Interference from another radio source can be solved by changing to a different practice channel."

But these requirements can be a real pain in the neck depending on your design...