Do you really think I am that stupid? Trust me, I know how to df and I DID use
a portable radio to find this house. Been dfing for years and I'm good at it.
I didn't just turn the beam that direction. I did my homework. I've been
tracking and documenting for two weeks
Sent from my iPhone
On Aug 16, 2010, at 4:06 AM, "Paul Christensen" <w9ac@arrl.net> wrote:
> Kelly,
>
> You'll need to start documenting the interference. To the best of your
> ability and time, keep a log of the times the interference starts and
> stops -- even if its days in between. As has been suggested here on
> numerous occasions, first ensure that the interference is not coming from
> your own property. That involves turning off all panel breakers and
> disconnecting battery-backed systems (e.g., security alarms).
>
> It's unreasonable for the neighbors to be turning on/off power without
> evidence. You need to secure some minimal evidence before making contact
> with them. If you don't, you're only a boy crying "wolf!" at best. At
> worst, you've just become the new neighborhood crackpot.
>
> The mind begins to conjure all kinds of things when the interference is
> really bad. "I need to move," "questionable renters," and "super powerful
> computers" mean nothing when you really need to flesh-out the root cause of
> interference.
>
> Today, we're confronted with more sources of interference than ever before.
> But fortunately we have some tools that were not available until recently.
> It may take you some time, but if you want to get really proficient at noise
> source detection, you're going to have to become knowledgeable with noise
> patterns and select the right equipment for detection.
>
> Before contacting neighbors, utility company or the FCC, you really need to
> have your facts straight. Simply turning your beam in the direction of the
> perceived noise source isn't nearly enough. You've got to localize it
> through triangulation.
>
> I have two systems here:
>
> (1) The first is a hand-held 3-element 2m Yagi and a 2m HT capable of AM
> mode. This system is primarily used for broadbanded power line noise;
>
> (2) The second system has been seeing much more use here in the past year,
> primarily due to the increased proliferation of switch-mode appliances. It
> consists of an Elecraft K3, SDR-IQ with SpectraPlus software, netbook PC,
> Palstar active rotatable loop antenna, and a small 12V gel-cell battery. I
> purchased a mid-size Pelican case to allow me to quickly set-up and break
> down the equipment as I roam the neighborhood. I generally do not need to
> access the neighbor's property. Most of my measurements are taken at the
> street or from within my property.
>
> After some time spent with switch-mode noise sources, I can now localize a
> noise source in about 30 minutes to nearly pin-point accuracy. However,
> some noise begins in a room of the home, and the home wiring propagates the
> noise to make it appear as if its coming from a different part of the house.
> That's one reason why it's so important to move around and take quality
> measurements. My system is self-documenting. I take PC screen captures of
> SpectraPlus showing noise levels all pointing to a single location. That
> becomes my evidence for presentation to a neighbor, or if necessary to the
> FCC. When you've got that kind of powerful data, the FCC is really on your
> side. But you cannot go to the FCC and talk in terms of "questionable
> neighbors," and "super powerful computers."
>
> It may seem like this is all going over-the-top in equipment and procedure,
> but if we want to enjoy the hobby without running a noise blanker all the
> time, we all need to become proficient in recognizing noise source patterns
> and know how and what type of equipment is needed to detect the problem with
> a high degree of accuracy.
>
> Paul, W9AC
>
> ---- Original Message -----
> From: "Kelly Johnson" <n6kj.kelly@gmail.com>
> To: "RFI List" <rfi@contesting.com>; <mike@rfiservices.com>
> Sent: Sunday, August 15, 2010 10:19 PM
> Subject: [RFI] Am I hosed? RFI problems
>
>
>> It took me two weeks, but I'm now about 99% certain that I found the
>> source of my horrible RFI problem. It's a house about 100 yards from
>> me. A group of questionable renters just moved into that house a few
>> weeks ago. The noise is worse than anything I have ever heard. It's
>> S9/S9+ on 40m through 10m; dropping down to S7 or so on 6m (all while
>> I beam that direction, which is unfortunately the direction I must
>> beam for the East Coast from here in CA). I can null it out if I beam
>> perpendicular to that direction, but unfortunately, there aren't that
>> many stations of interest directly north or south of me :-(
>>
>> When I told the renter today that I have heard the noise start at 8am
>> the last 2 days, his first response was: "there's a guy here that has
>> a very, powerful computer that he turns on at 8am". He asked the guy
>> to turn it off to see if it was the source and the guy clamed to have
>> done it, but I don't believe he did. I think he was just trying to
>> get rid of me. The noise was still there. When I asked the guy if he
>> would be willing to shut everything off to see if it went away he said
>> no. I don't know what to do now. My HF station is nearly worthless
>> at this point with S9+ noise. I can't hear much of anything above the
>> hash. My S meter read S0 last night at 10:30pm and still S0 this
>> morning from 6am until 8am. I was sitting in front of the radio at
>> 8am when the noise came on. The S meter instantly jumped from S0 to
>> about S7. It slowly got worse until it peaked at S8 on CW in a CW
>> 250HZ bandwidth and S9+ in a 2KHz bandwidth on SSB.
>>
>> Any advice (other than move, wait for these guys to move, or something
>> illegal)?
>> _______________________________________________
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>>
>
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