One thing I noticed when driving around with a PC+ USB spectrum analyzer
to find a new QTH, was how much quieter neighborhoods with in ground
utilities were from those with the old "poles and pigs" distribution
systems. Another observation was that big HV transmission systems were
quieter than expected when a few hundred yards from them. My conclusion
is the buried systems shield and choke the rf, just as happens with
buried coax. IMO, much of the rf trash we hear is generated by bad
devices and then radiated from pole systems. 60 acres NW of me were
recently developed, 20 homes on 2 acre lots plus open space and
underground utilities and so far so good. A plasma TV SW from me is an
S4 problem, but I haven't tracked it down. Hopefully, the new
subdivison near you will be all buried.
Several local hams here are seriously affected S9+ all bands by large
grow lights for recreational substances that are clearly not FCC
compliant re radiated and conducted emissions. The distance can be
significant - 1/4 mile or more. Most are probably illegal but of no
interest to law enforcement given trends of the new laws. The FCC
either "doesn't have the resources" or "won't investigate where illegal
activity may be happening without law enforcement present". A perfect
Catch22. In the past, when growing was clearly illegal, law enforcement
used AM radios to find the grow sites.
Grant KZ1W
Redmond, WA
On 5/9/2016 0:21 AM, Ray Benny wrote:
body {height: 100%; color:#000000; font-size:12pt; font-family:arial,
helvetica, sans-serif;}This may seem a strange question to ask and there maybe
many answers, so I will try to be specific as to what I am looking for.
A new subdivision is being built about 1/4 mile away, east and north east,
towards EU. The homes are custom build on 1 acre parcels. What I am trying to
find out: can I expect my noise level to go up as more homes are built?
I spend a lot of time on 160m. I have a RX 4SQ and 2 wire beverage, and I do
hear a number of small RFI noises in a number of directions from nearby homes
in my rural area. Most of the time they do not cause any long term problems. My
thought is that when new housing comes in, new and more electronic gadgets will
be inside that can generate more RFI.
I have done some RFI tracking, mostly electric fences and leaking/defective power line
hardware, but these sources are usually very distinctive and usually easy to fine.
Finding wall wart, LED, etc RFI is harder to find, especially on someone else's property.
Another way to ask my questions: "Does this type of RFI noise typically radiate more
than several hundred feet"?
Any thoughts or experiences are welcome.
Tnx & 73,
Ray, N6VR
Chino Valley, AZ
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