On 7/11/2012 10:17 AM, Scott Yost wrote:
> Anywhere there is AC wiring it is hot. So I have it radiating from my own
> home wiring as well as theirs.
That suggests that both your own home and theirs might not be well
grounded at the service entrance. The AC mains coming into most homes is
a twisted triplet (hot, neutral, hot), so from an RF point of view are
tightly coupled together. Neutral MUST be bonded to ground, and ground
must be carried with hot and neutral to every outlet. The ground
connection at the service entrance SHOULD serve as part of a low pass
filter for the common mode signal (and there should be another one at
HIS service entrance). The characteristics of that filter will depend
on the length of the ground wire, and on the quality of the ground
electrode.
Grounding in homes is often screwed up by careless electricians. For
example, in the home I bought here in CA, neutral WAS properly bonded to
the enclosure at the service entrance, but the "ground" connection was a
50 ft long #12 that was clamped to a spigot for a garden hose, and the
spigot went to PVC pipe. So there was NO earth connection at all, and
when I added earth electrodes (rods) for my ham station, all the power
line noise went to ground through the power wiring to my ham gear.
I strongly agree with the suggestion that you buy him a wireless router
and whatever other gear he needs to make all his computers work with
it. And if you do, be sure to add multi-turn ferrite chokes to both
power wiring and the wired connection to his internet modem.
73, Jim K9YC
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