[RFI] RFI Identification Help
dscribner at myfairpoint.net
Tue Nov 12 15:48:14 EST 2013
I think I located the source of the noise. A street light that keeps cycling
on and off...even during the day. It matches the cycle of the interference.
I entered a trouble ticket with the local utility company and the work has
The pole is about 1/2 mile from me.
I'll post the results.
Doug - K1ZO
----- Original Message -----
From: "Gary Smith" <wa6fgi at yahoo.com>
To: <rfi at contesting.com>
Sent: Tuesday, November 12, 2013 3:40 PM
Subject: Re: [RFI] RFI Identification Help
> You might want to help out the local pwr company by giving them the "pole
> number". Where I live this is a vertical strip with 5 digits on it.
> The folk I have talked to when reporting a light out or other problem have
> greatly appreciated this info.
> On 11/11/2013 5:32 AM, dalej wrote:
>> The street lights we have in our city (Bloomington Mn.) have a little
>> device on top that senses when it's getting dark and to turn on the
>> individual street lights. When that thing goes bad or if the ballast
>> inside the light fixture goes south, these lights can produce ungodly
>> amount of on and off noise. I have found these things several blocks
>> away from my QTH with interfering noise. Sometimes when they are in
>> failure mode they will be on steady during the day. So if you have this
>> type of street light drive around for several blocks away from your QTH,
>> night is best as these things will be on bright for a half minute or so
>> then suddenly shut off, wait a few more seconds and you will see them
>> start to come on slowly and that is the time they generate their noise,
>> awful noise and on the low bands, 80 meters which I use. Fortunately for
>> me the local power company has responsibility for maintaining these
>> lights and they have been responsive to my calls, depending on other
>> rkload priority.
>> I'm not saying this is your noise source rather just sharing my
>> experience with on off type noise, as another poster mentioned it too.
>> 73 and I hope you can find it.
>> Dale, k9vuj
>> On 11, Nov 2013, at 6:40, Doug Scribner <dscribner at myfairpoint.net>
>>> Upon further investigation I have discovered that the interference is
>>> also present during the daytime although it is much lower in amplitude.
>>> It still maintains the same On/Off cycle.
>>> Doug - K1ZO
>>> ----- Original Message ----- From: "Lee K7TJR" <k7tjr at msn.com>
>>> To: "'Doug Scribner'" <dscribner at myfairpoint.net>
>>> Sent: Sunday, November 10, 2013 9:45 PM
>>> Subject: RE: [RFI] RFI Identification Help
>>>> Doug, this might be a street light cycling at night. It's a little fast
>>>> of a
>>>> cycle, but they only come on at night.
>>>> Suggest you drive your neighborhood at night with a BC radio and you
>>>> be able to find this if it is a light,
>>>> while observing it go off and on.
>>>> The noise is very strong as the light comes on and quiet when it goes
>>>> Good Luck,
>>>> Lee K7TJR
>>>> -----Original Message-----
>>>> From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Doug
>>>> Sent: Sunday, November 10, 2013 4:23 PM
>>>> To: rfi at contesting.com
>>>> Subject: [RFI] RFI Identification Help
>>>> Primarily on 160. Although it is also present on 40 and 80. It is much
>>>> stronger on 160
>>>> Only on at night...after dark.
>>>> Cycles On and Off at set intervals. 20 seconds On and 30 seconds Off.
>>>> Produces S4-5 spikes every 2.5 to 3 Kc
>>>> A neighbor less than 1/4 mile away recently installed an electric
>>>> fence. I
>>>> do see regular spikes, very short in duration. Not really that much of
>>>> I have verified that it does not come from within my house.
>>>> I have a picture of the interference on my SM-5000 station monitor if
>>>> thinks that would help.
>>>> Any assistance would be greatly appreciated. It has really put a damper
>>>> my 160 operation.
>>>> Doug - K1ZO
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