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-Original Message-
From: Jay Bromley jayw5...@cox.net
To: Discussion of AM Radio in the Amateur Service
amradio@mailman.qth.net
Sent: Fri, Jan 22, 2010 12:38 am
Subject: Re: [AMRadio] QRM fron Neighbor's Security System
Hi Jim,
I just went through nearly a year of this! You would not believe
Do any of you guys have any idea as to how many Field Engineers the
FCC employs? NOT many! The last time I checked, they had a grand
total of TWO for the southeast United States. Out of Atlanta.
Do you really think they are going to go out and get involved with
this when they have all of
Years ago my young son bought one of those scooters with his own
hard-earned money...
Steve,
The switch-mode chargers used for scooters are notoriously noisy. I had a
similar issue with the neighbor to the side of me. These supplies offer
little or no common-mode filtering between the
It can be quite interesting approaching someone who innocently is a source of
interference.
Years ago when I worked in two-way we had a problem with interference on the
input of a customers repeater.
A signal would come and go, sounded like TV raster. Was strong enough to take
out the
entertainment value.
-Original Message-
From: Bry Carling bcarl...@cfl.rr.com
To: AM Radio amradio@mailman.qth.net
Sent: Fri, Jan 22, 2010 8:50 am
Subject: Re: [AMRadio] QRM fron Neighbor's Security System
Do any of you
, January 21, 2010 11:39 PM
Subject: Re: [AMRadio] QRM fron Neighbor's Security System
You can certainly avail yourself of the FCC but before you start
contacting them I would (after following through with your plan to
make sure something your neighbor has, is indeed the problem) attempt
to work something
If this is a sign of what we can expect in the way of FCC policy (and
I hope it is not) then the message I get is every man for himself and
if the noise floor raises, then we have to raise our signal strength
along with it in various ways such as increasing ERP and improving S/N
ratio on rx. I do
Mike, glad to read one account of the FCC doing something. I have
always thought that I'd welcome a visit from them. I have nothing to
fear. I know I'm linear, clean (including 2nd harmonic), and under 1.5
kw. AND, I imagine they'd have some fancy super dooper analytical
gear with them so I'd
..
--
From: Mike Sawyer w3...@verizon.net
Sent: Friday, January 22, 2010 5:21 PM
To: Discussion of AM Radio in the Amateur Service
amradio@mailman.qth.net
Subject: Re: [AMRadio] QRM fron Neighbor's Security System
Rob, (et al),
I wouldn't count on the ARRgghhL doing
Jim,
You reported the following. I have recorded a problem like this with an 8566B
in peak mode. There is a
continuous sweep from about 7.1mc to 8.5mc at a two to five second rate.
Traced it to a neighbor who just installed the X10 security and home control
system. It's using the spread
On Thu, Jan 21, 2010 at 7:51 PM, JAMES HANLON knjhan...@msn.com wrote:
Jim,
If I had a problem like that, I would discuss it with Ed Hare, W1RFI, the
ARRL Laboratory Manager. Ed is quite active in fighting RFI, especially that
involved with BPL systems. I am pretty sure that you do not
I am not familiar with this particular system, but most X-10 equipment uses
the home's power lines for transmission. If you are both on the same
transformer, you may be getting interference from your home's power line. You
may need some power line filtering. Depending on your gear, you may
:51 pm
Subject: [AMRadio] QRM fron Neighbor's Security System
Jim,
You reported the following. I have recorded a problem like this with
an 8566B
in peak mode. There is a
continuous sweep from about 7.1mc to 8.5mc at a two to five second
rate.
Traced it to a neighbor who just installed the X10
Sometime in the recent past there was a ham in Houston, TX (I believe)
who had interference that he traced to a neighbor who had two of those
electric scooters, one for him and one for his wife. The noise was on
every night and the battery charge circuits put trash on the AC lines
that tore
Hi Jim:
May have been a coincidence that the same home started radiating a sweep that
behaves like spread spectrum 7.1mc to 8.5mc at the same time that the
security/control system was installed. I hate to knock on a neighbors door and
ask to walk around with a probe looking for illegal or
You can certainly avail yourself of the FCC but before you start
contacting them I would (after following through with your plan to
make sure something your neighbor has, is indeed the problem) attempt
to work something out with your neighbor first. I have been through
the RFI dance myself on the
Hi Jim,
I just went through nearly a year of this! You would not believe how wide
or how far those signals from a little battery charger can go. Over and
down the next street from my house that was about 1/8 a mike away! Also
what made this even worse it was HF only! With the help of my local
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