Based on that report, the signal levels involved and the distances, I have
little doubt that the device is operating WAY above the emissions limits for
this sort of device. It appears to be a carrier-current device (a device that
intentionally conducts signals onto power lines), which would have a limit on
HF that would be approximately S9+10 dB to a Yagi located 30 meters from the
wiring. If this is being heard for 2 miles, radiated from house wiring, I
can't imagine that it is legal.
If this is still available, I'll get one and we can measure its field strength.
The other device mentioned at the end of the article appears to be a HomePlug
product. HomePlug products do meet the emissions limits and, better news yet,
do not use the Amateur bands. They can and do cause interference to other HF
use, such as shortwave broadcasting, WWV, but few hams are willing to initiate
formal harmful interference complaints as a result.
I had been trying to get interference assessments and reports from a number of
BPL areas, to little avail, but when IBEC recently shut down all of its BPL
operations, I heard from a number of hams telling me how happy they were that
all the noise on shortwave broadcast was gone.
73,
Ed Hare, W1RFI
ARRL Laboratory Manager
225 Main St
Newington, CT 06111
Tel: 860-594-0318
Email: W1RFI@arrl.org
________________________________
From: rfi-bounces@contesting.com on behalf of Tim Duffy K3LR
Sent: Sun 4/20/2008 3:18 PM
To: rfi@contesting.com
Subject: [RFI] 15 meter RFI problem - Super documentation
Thanks to Greg, W8WWV who found this RFI source and detailed his experience.
http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/Secur
eViewRFI.pdf
73!
Tim K3LR
http://www.k3lr.com <http://www.k3lr.com/>
K3LR DX Cluster telnet://dx.k3lr.com
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