I have my router in my house and need access to it in my outbuilding (about 250-300ft)
Like what channel goes the farthest and what is up with the 'long and short' preamble? if anyone could help thanks.
If you don't mind voiding your router's warranty you can also look into programs like DD-WRT. Your reflash your router and the program adds features that allow you to boost signal, overclock and a whole bunch of other features. DD-WRT is just one of the programs. I think another is Tomato. Not all routers can be reflashed but a lot are.