I've had WiFi problems for many moons on 10.9: long latencies when pinging the router and complete dropouts for periods of 2-10 seconds every 3 minutes or so.

I've had WiFi problems for many moons on 10.9: long latencies when pinging the router and complete dropouts for periods of 2-10 seconds every 3 minutes or so. The problem seems only to happen with certain routers. I was hopeful that my problems could be explained by the AirDrop issue (i.e., maybe I was only having problems when in proximity to certain computers using those troublesome routers). Sadly, I don't even have the awdl0 interface. I tried taking down p2p0 but that didn't help either. Any other ideas? I am really desperate!!!