[RFI] Electrical Noise RFI
Dana Roode <K6NR@ARRL.net>
Sat, 22 Jan 2000 21:57:58 -0800
I described my electrical noise problem a few weeks back on the
reflector - thanks for the input thus far. My really-bad noise went
away by itself (for now), but I am left with a fairly high noise on
the higher bands, and a particularly bad noise on 80m. Tonight I did
some "noise prospecting", driving around in my car with my IC706
connected to a 80m ham stick whip. Here's what I know:
*) Listening with my 35' top-loaded vertical on 80m from home, I have
S8-9 noise at both the low end of 80m (3500) and the phone band
(3800). There is a distinct peak in noise (S9+10db) at about 3527, I
assume from one of those nice wireless network outlets we've heard
about. The noise sounds like very intense "white noise". At times it
pulsates, getting stronger every 1 second or so, then weaker.
*) As I drove around with my IC706+hamstick, the only peaks in noise
listening at 3496 were in the major intersections near me with traffic
lights (each about 1/5 of a mile away from my home) and in the local
grocery store shopping center (about 3/4 of a mile away). The minimum
noise was about S2-3 on the 706, the traffic lights were S9->S9+10,
and the shopping center about S9+10.
*) Listening at 3527, I did find a 30db over 9 peak on one particular
street in one location. Guess I know where approximately my friend
with the wireless outlet lives.
I have an AR8000 .5-2000mhz portable receiver, and happened to have a
little 5 element 1296 mhz beam. Just for kicks, I took it down to the
traffic light and poked around. I didnt hear much at all on 1296 mhz
SSB, *except* I found a very sharp peak - from underneath the concrete
below the signal pole on the corner I was listening from.
*) Is it possible the outlet on 3527 is causing noise on 3500 and 3800
*) Has anyone had any experience with noisey traffic signals? When I
mobile around the city here in Irvine, every intersection is noisey on
HF as I drive through. Should I call the City? Will they care?
Any input welcome! I can record the noise and put it up on the Web if
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