I bought a refurbished 1 TB Time Capsule (FB277LL/A) in August 2009. I'm looking for options for optimizing its Wi-Fi performance. The TC is upstairs in my home office so it can have a wired connection to my iMac and Vonage box. For years, it provided good performance (coverage and speeds) in my living room, which is downstairs and on the other end of the house. A few months ago, my wife's Windows laptop died, and she started using my mid-2012 MBA. Ever since, when we're in the living room, my iPad 1 has trouble maintaining a connection to the TC, and my wife often complains that the MBA doesn't stay connected as well as her old Windows machine. When I use the MBA there, I notice that it often loses the connection. The only other thing that's changed since performance went downhill is that Apple pushed out an AirPort update. I think that was in July. First question: Is anyone else experiencing reduced TC coverage since that update? Second question: Is it possible that the TC is performing normally, but the the MBA and iPad are interfering with each other? If so, what are my options for reducing that interference? For example, I don't see any settings in AirPort Utility -- both the software that I access via my iMac and the AirPort Utility app for iOS -- that would let me put each device on a separate channel. Final question: Moving the TC to a central location in the house isn't an option. What about Wi-Fi range extenders? Do they work well? Any models to focus on or avoid? Thanks in advance.