First follow-up to the original post. Let me thank everyone for their
interesting responses so far. As always an education.
I can tell you it is NOT the 900 MHz wireless phones. We disconnected
both of them from AC Mains and telco. We also turned off the outside
motion sensing lights. Neither one solved the problem.
We have one digital timer that turns on a light about 5 pm and off about
11 pm. This light is a CFL. We are going to replace it today with an
incandescent to see if that helps. We have two other CFL in the kitchen
but they aren't used very often. We also have another digital timer that
turns on an incandescent light at random times. It is usually manually
turned off when somebody gets home from work in the evening. So two more
tests would be to replace the other two CFL just to be sure and to
remove the digital timers.
We can think of no other time dependent gizmos that operate only during
the 6-10 pm window in our house. There are things that maybe could cause
the issue, but they are just as likely to operate at other times as
during the problem time.
Does anybody think this could be a conducted EMI issue (on the AC Mains
getting through the little wall-warts that power either the router or
radio)? Or does it seem more likely a to be a radiated issue, as in
messing with the modulated RF between our radio and the access point? Or
maybe radiated into some cabling or wiring in the house? Still trying to
narrow the mechanism down.
Somebody asked why is the antenna in the tree. The AP is down by the
lake, maybe 150-200 feet lower elevation. And there are hills and tons
of trees between us. The ISP brought a bucket truck to move the antenna
around and see where he could get the best signal. And it was not from
on or around the house. We have seen no power issues on the radio at any
time of the year (except when we have ice storms). The AP relays to the
main system antennas on top of a local "mountain". An ice storm in
January 2011 coated the main system antennas with 6 inches of ice. The
tower was so coated it was too dangerous to climb so we had to wait
until they melted. Otherwise weather has not been an issue.
I am not aware of any local radio operators within a mile of our house.
There are some dish users that may have communications over the power
lines, but they are at least a distribution transformer or two away from us.
The saga continues.
Scott
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