Re: [IRCA] [NRC-AM] 1500 KHz "Mystery Station"

[Les Rayburn <les@xxxxxxxxxxxxxxxx>]

Tim,

Thank you for posting this. Extremely helpful for both DXâers 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 didnât 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
>> nightâoften an hour or more than would be required by rule. I live in
>> Alabaster (Maylene) and theyâre not even staying on at the 3 watt level now
>> at night.
>> 
>> The station was an infrequent cheater in the past, but I havenât 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
>>> weâre 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
>>> 
>>> 
>>> _______________________________________________
>>> Now accepting Pre-orders for the
>>> 36th Edition of the AM Radio Log
>>> http://www.nrcdxas.org
>> 
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