Mike,
Talked to Mitch at RTI about your problem. He was telling me that dead spots are common with RF signals. He described it as sort of a wave effect, and that sometimes the signal is being carried on the low part of the wave and does not get through. He went on to tell me that RTI is considering packaging two antennas with the IRF-6 to eliminate this problem. I have asked them to put together some sort of retro kit that I can offer existing IRF-6 owners that are having problems. I will let everyone know what RTI comes up with. Thanks for your patience.
Bill
www.homeautomationnet.com