In my experience, 1-Hz "ticks" are almost always an electric stock fence with a
problem, such as a wet post or weeds partially shorting it to ground, causing
an arc. However, they aren't band-specific.
73, Pete N4ZR
At 11:22 AM 10/17/2006, Kelly Johnson wrote:
>Thanks. I was able to track the source down to one of 3 houses using
>a whip antenna. I'll need something more directional to narrow it
>down further OR go house to house. The houses are about 200 yards
>away or so. I'm really curious what device is causing this problem.
>It only seems to affect 17 meters and it sounds like a "tick, tick,
>tick" at about a 1Hz rate.
>
>On 10/16/06, Jay Bareman <Radio_Q@mchsi.com> wrote:
>> Hello and sorry for the delay in responding to this thread. I had almost
>> the same noise and DF problems here and asked the group about it back in
>> November 2005
>> http://lists.contesting.com/archives//html/RFI/2005-11/msg00005.html
>>
>> In my case, with the bands being so dead, I just ignored it as the owner of
>> the house is a bit of a 'weird dude' so I chose not to confront him without
>> some more suspicions of what I might be looking for.
>>
>> Fortunately for me, something changed and I have not had the noise for
>> several months now.
>>
>> I guess the bottom line to my message is that 1) keep walking around and you
>> will likely find it within a block or so of your qth. 2) Look for coax
>> coming out of his telephone network box (DSL ?) 3) If you have a 'nice
>> neighbor' and are able to figure it out, I know the list would love to hear
>> what you found!!
>>
>> 73's
>>
>> Jim K5QQ
>>
>>
>> -----Original Message-----
>> From: rfi-bounces@contesting.com [mailto:rfi-bounces@contesting.com] On
>> Behalf Of Kelly Johnson
>> Sent: Monday, October 02, 2006 6:57 PM
>> To: rfi@contesting.com
>> Subject: [RFI] DFing an HF RFI source
>>
>> I have an RFI source in my neighborhood that I'd like to track down,
>> but could use some advice.
>>
>> The noise source sounds like a "click" or small burst of energy at
>> approximately 1Hz. In other words, I hear a burst of RFI a little
>> faster than once per second. It seems to be relatively narrow band.
>> I don't hear it below 17 meters. It is strongest on 17 meters, but I
>> can sometimes hear it on 15 meters and maybe even 10. I've never
>> heard it above that. I have DF'd the general direction using my tower
>> mounted HF yagi and the RFI peaks at about S7 or S8 on 17 meters which
>> is fairly strong, however I can't hear it when I walk the neighborhood
>> in that direction with my FT-817 and a whip. I obviously can't carry
>> a 17 meter yagi around the neighborhood. What other decent antenna
>> can I use to DF something doesn't appear to be broadband enough reach
>> into the VHF region?
>>
>> FYI - The strength of this noise source varies from day-to-day and
>> some days I don't hear it at all, but it's there most of the time.
>> _______________________________________________
>> RFI mailing list
>> RFI@contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
>>
>>
>_______________________________________________
>RFI mailing list
>RFI@contesting.com
>http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|