What do you do about wifi switches/routers/wireless-nics/etc?

It seems, to me, the frequencies which the Ghz signal(s) are modulated at,
by the data stream of bits, is/are the real offender(s)? Other than the
strategic placement of these devices and directional antennas, I have
found little control over the RFI.

Hi, John,

I have found the exact same thing as you. The modulation rate on those
wireless modems and such fall right in the HF band. You've already listed
what I've tried: antenna orientation.

However, most of those things have a variable power output. You can "log in"
to
them via a web interface; point your browser to their IP address and you can
perform administrative functions including adjusting the output power.

One of two things will happen: Increasing the output power may cause the
data rate between your computer and the router to increase, pushing the RFI
higher in the HF spectrum. Or, you may find that using the minimum power
possible you can reduce the interference level. I guess what I am saying is
try changing it and see what happens.

The one I am using right now is an AT&T wireless DSL modem made by 2Wire.

Good luck,

Al W6LX