I've noticed that all of my PC friends receive strong Wi-Fi Signals, but my airport signal is weak or non existant. Why? I use a 12" PowerBook G4. I've tried turning on "Interference Robustness", but that didn't do anything. Is there anyway that I can boost my signal? My PC friends will be able to log on to a network, but I won't be able to due to a low signal strength. I've also noticed that sometimes, I can log on to a network with a very strong signal, and then the signal will fade away a few seconds after connection. What's that? It seems to me that the PowerBook amplifies the wi-fi antenna signal to connect to a network and then reverts to "normal operating signal strength" after connection. If I could just keep it at the amplified signal strength, it would be all good.