What is it with time capsule that I get this swing in signal/ connection ? My time capsule is on the attic. Nevertheless I am pretty well able to internet downstrairs with my MBA most of the time. Obviously I want to have a stable and strong signal all of the time. As replacing the TC one level down is not an option (hate cables) I am looking for a kind of wireless amplifier device for the N signal, midway attic / downstrairs . Has anyone good advice / suggestions on which device to use ??