Re: [IRCA] 1500 KHz "Mystery Station"

[Rick Dau <drummer1965us@xxxxxxxxxxx>]

Well, it shoots down my suspicion that WLAC was somehow causing this warble 10 KHz down from its home frequency.  So the mystery continues, it looks like.



And I have no shot at hearing it here.  I'm 2 miles from the tower of KOMJ 1490 (I'm 78 degrees from it) and if I turn the loop 90 degrees from it and do a VERY tight null, I don't get much of anything on 1500 other than St. Paul and, occasionally, Pawhuska, Oklahoma.



73,

Rick Dau

South Omaha, Nebraska EN21af

http://www.dxworld.com/bcblog.html

________________________________
From: Les Rayburn <les@xxxxxxxxxxxxxxxx>
Sent: Sunday, February 7, 2016 6:33 PM
To: Rick Dau
Cc: IRCA Radio List - irca@hard-core-dx_com; ABDX Yahoo Group - abdx@yahoogroups_com; National Radio Club NRC am@nrcdxas_org
Subject: Re: [NRC-AM] 1500 KHz "Mystery Station"

Sorry to disappoint Rick, but your hypothesis needs some adjustment.

Just went outside in the back yard with a Sangean PR-DR portable. The mystery signal on 1500 KHz was very loud—dominating the channel just after sunset at 6:20 PM Central Time.

The maximum signal off the ends of the loop (sides of the portable radio) was obtained at a bearing of roughly 300 degrees (NW) or 120 SE.

I checked several times to be sure that there was not a peak towards due North, and verified that the mystery signal did not peak in that direction.

What does that do to the list of suspects?

BTW, received an e-mail saying the following:

I have a low cost app on both Android and iPhone called SigTrax that may be a benefit to you and the others who are looking for this signal.

SigTrax allows you to plot bearing on a map image and computes and crosspoints where the bearing plots intersect.  It's a perfect solution for triangulating signals from multiple points and different users. You can also save the bearings in an archive and recall and update them at any time.


73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL
EM63nf

Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.

Elad FDM-S2 SDR, AirSpy SDR, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active Whip.


On Feb 7, 2016, at 5:38 PM, Rick Dau <drummer1965us@xxxxxxxxxxx<mailto:drummer1965us@xxxxxxxxxxx>> wrote:

Glenn says he's getting it strongest on a 95 degree bearing from Enid.  Tim, you say that you're only hearing it on your south antenna.  Les, from your QTH in Maylene, I would suggest pointing your antenna due north.  If my suspicion is correct, the warble should almost be blowing your doors off.

73,
Rick Dau (loves playing the sleuth)
South Omaha, Nebraska EN21af
Http://www.dxworld.com/bcblog.html
________________________________________
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Tim Tromp <kilokat7@xxxxxxxxx>
Sent: Sunday, February 7, 2016 4:04:03 PM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] [NRC-AM] 1500 KHz "Mystery Station"

Les,

I'm not setup with a rotatable loop so I'm unable to get a bearing on this
other than confirming that I only hear it on my south antenna.  I know, not
very helpful..

73,
Tim


On Sun, Feb 7, 2016 at 4:52 PM, Les Rayburn <les@xxxxxxxxxxxxxxxx> wrote:

Tim,

Thank you for posting this. Extremely helpful for both DX’ers and members
of the broadcast engineering community who are attempting to help narrow
down the station with the problem.

Do you have a bearing on the station from your QTH?


73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL
EM63nf

Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.

Elad FDM-S2 SDR, AirSpy SDR, Quantum Phaser, Wellbrook ALA1530 Loop,
Wellbrook Flag, Clifton Labs Active Whip.


On Feb 7, 2016, at 1:41 PM, Tim Tromp <kilokat7@xxxxxxxxx> wrote:

Just so everyone's on the same page, here's a recording of the
interference
that's in question, which I assume is what everyone else is referring to.
I have issue with calling this a "warbler" or "warbling" since I
immediately think of the Cuban transmitters with the wobbling carrier
that
sounds like someone flexing a piece of sheet metal.  This sounds nothing
like that.  The noise is present in both the upper and lower sideband and
it appears at 500 hz intervals centered about the carrier.

https://www.youtube.com/watch?v=_M4opnMHq88

73,
Tim Tromp
West Michigan


On Sun, Feb 7, 2016 at 11:56 AM, Les Rayburn <les@xxxxxxxxxxxxxxxx>
wrote:

Excellent information Glenn. We went to Tennessee yesterday on business,
and I brought along a portable to get some DF bearings. The warbler
noise
was very loud on the car radio right at sunset, but I didn’t have time
to
try for bearings then. After dinner with clients, I checked again and
the
noise was so low in the mix of stations that getting a solid bearing
would
have been fruitless.

I can confirm that WQCR in Alabaster is powering down completely at
night—often an hour or more than would be required by rule. I live in
Alabaster (Maylene) and they’re not even staying on at the 3 watt level
now
at night.

The station was an infrequent cheater in the past, but I haven’t heard
them do that for the past couple of years.

We can eliminate them as a suspect for the noise.


73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL
EM63nf

Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.

Elad FDM-S2 SDR, AirSpy SDR, Quantum Phaser, Wellbrook ALA1530 Loop,
Wellbrook Flag, Clifton Labs Active Whip.


On Feb 7, 2016, at 10:05 AM, Glenn Hauser <wghauser@xxxxxxxxx> wrote:

UNIDENTIFIED. 1500, Feb 7 at 0119 UT, not much signal from KSTP, so I
am
hearing the blues music station and the warble-tone. KSTP is so weak
that I
can get pretty good bearings on these two, nulling them without KSTP in
the
way: warble is about 95 degrees, and blues about 135 degrees (assuming
they
are both eastward rather than westward). Tends to confirm blues source
as
the station doing that all-night, KCLF New Roads LA. At least on
weeknights, with weekends unaccounted for:
http://kclf1500am.com/shows.html

Closest to the 95 degree angle from Enid with the warble are three
Alabamans and one further Georgian: WQCR Alabaster, 2300/3 watts, WVSM
Rainsville, 1000/-, WKAX Russellville, 1000/-; and WDPC Dallas GA,
5000/CH
3200 (Glenn Hauser, OK, DX LISTENING DIGEST)


On 2/5/2016 11:55 AM, Rob Keeney wrote:


If everyone posts their location and loop bearing of the
noisy xmtr, I'll

try and plot the data.



Rob Keeney

Goose Creek SC

EM92xx



On Fri, Feb 5, 2016 at 11:09 AM, Les Rayburn <les@xxxxxxxxxxxxxxxx>
wrote:




Most of us are using bi-directional (simple) loops, but
we’re spread out

geographically. If we plot these on a map, we should be able
to determine

the location pretty quickly. Assuming that the culprit is a
licensed

broadcaster with transmitter problem, there are a limited
number of

suspects.



Anyone have time to try this?



73,



Les N1LF





Les Rayburn, director

High Noon Media Services

130 1st Avenue West

Alabaster, AL 35007-8536



On Feb 4, 2016, at 8:00 PM, Rob Keeney <rkeeneybbq@xxxxxxxxx>
wrote:



I had WFED in pretty well at first look around 1730 ET with
no sign of


the


warbler.  Next check was 1845 ET and the warbler was
present, but

definitely looping west of WFED.



Rob Keeney

Goose Creek SC

EM92xx


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