[TowerTalk] How far does RFI travel?

[Patrick Greenlee]

Of course there is no magic distance beyond which RFI hits a "Gardall 
Shield." Distance attenuates and at some point the level will go 
significantly below your natural noise floor (world wide lightning 
discharges etc.) Another answer is, "It depends."  If you have some pot 
growers using industrial lighting instead of residential lighting then 
be prepared for lots of noise.  Fairly recently there was a big flap 
over commercial/industrial lighting being sold at the big box stores 
being put into residential use. The RFI emissions of the residential 
grade lighting are much lower than the industrial which cause 
significant RFI problems.

Patrick        NJ5G


On 5/9/2016 2:21 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
>