[RFI] Tip on approach to, or where to start looking for new noise source

[WW3S]

Been there, done that….
Except…..when I killed the main breaker the noise continued so I “assumed” it wasnt my house……turns out my catv modem has a battery backup for my voip phone service….and yes, that was the culprit. Cable company swapped it for a newer version and noise went away……now only 40 more sources to find !! 

Sent from my iPad

> On Dec 31, 2022, at 3:33 PM, David Eckhardt <davearea51a at gmail.com> wrote:
> 
> And another thought:
> 
> Every Christmas RFI complaints increase only to drop off after New Years.
> You might wait (and hope) that it disappears after the holidays.  If not,
> will.........time to DF.
> 
> But, first, exercise you breakers at home and if you can, run your receiver
> / transceiver on battery power so you can shut off the entire house to
> start your search.
> 
> Dave - WØLEV
> 
>> On Sat, Dec 31, 2022 at 8:21 PM Hare, Ed, W1RFI <w1rfi at arrl.org> wrote:
>> 
>> It can be useful to know *broadly*​ what it is, but this falls into very
>> broad categories.
>> 
>> o Power line noise
>> o Cable or DSL leakage
>> o Electric fence
>> o Device in a home
>> 
>> It is the latter that can really trick you up, because even if you know
>> it's a lamp dimmer, you still gotta' go find it, and what if some new
>> device makes a similar noise?
>> 
>> Ed
>> 
>> ------------------------------
>> *From:* RFI <rfi-bounces+w1rfi=arrl.org at contesting.com> on behalf of
>> David Eckhardt <davearea51a at gmail.com>
>> *Sent:* Saturday, December 31, 2022 3:18 PM
>> *To:* k9mk at flash.net <k9mk at flash.net>
>> *Cc:* RFI List <rfi at contesting.com>
>> *Subject:* Re: [RFI] Tip on approach to, or where to start looking for
>> new noise source
>> 
>> I occasionally detect an electric fence at my rural location.  Mine is a
>> very sharp pulse every second.  There are other designs and signatures that
>> serve the same purpose.
>> 
>> Why be so concerned with the "what it is" if it is interfering with your
>> operations?  Rather attempt to discover "where it is" and then attack the
>> problem.  Your wasting time and effort to determine specifically "what" it
>> is.  Do the DFing first and then you know what you are dealing with.
>> 
>> Dave - WØLEV
>> 
>>> On Sat, Dec 31, 2022 at 6:36 PM <k9mk at flash.net> wrote:
>>> 
>>> Greetings to the group,
>>> 
>>>   This week I discovered something new on the HF bands.  It does get
>>> stronger on the lower bands.
>>>   I am not sure what it is (yet).  At first, I thought it was an
>> electric
>>> fence but now I'm not so sure.
>>>   I'm seeing five on and off pulses.  The pulse duration is one second
>> on
>>> (wideband noisy hash) and then off for three.
>>>   That repeats five times and then it goes quiet for about 30 seconds,
>> and
>>> then repeats.
>>> 
>>>   Has anyone else seen something with this signature?  Thanks in
>> advance.
>>> 
>>> 73, Mike K9MK
>>> 
>>> PS: My QTH is rural, and the community is mostly cattle ranchers.
>>> 
>>> 
>>> _______________________________________________
>>> RFI mailing list
>>> RFI at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>>> 
>> 
>> 
>> --
>> *Dave - WØLEV*
>> _______________________________________________
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>> 
> 
> 
> -- 
> *Dave - WØLEV*
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