Topband: 1940 kHz Intruder

Fri Jan 6 15:04:51 EST 2023

Hi Rick and Frank,

This may have already been discussed offline but if WWRU 1660KHz is indeed
one of 2 stations mixing then the math suggests 1380 KHz is a prime
candidate regarding the second transmitter involved in the generation of a
3rd order IMD product that falls on 1940 KHz and it turns out that WKDM
1380 KHz actually shares the same transmitter site as WWRU 1660 KHz.

I'm having problems with the FCC AM database at the moment, but it appears
the transmitter site address for both stations is 350 Paterson Plank Rd,
Carlstadt NJ and sure enough I see 8 towers at this address using google
earth.

Just FYI,
Don wd8dsb

On Fri, Jan 6, 2023 at 10:59 AM Rick Lapp <rick at ricklapp.net> wrote:

> Fred, what made it easy was hearing an English language pop song that I
> could easily identify through the fading and static. Switching the VFO to
> the broadcast band, I simply scanned until I heard the same song. Confirmed
> it with several other songs that nailed it. My Korean is rusty so the music
> made it easy.
> Rick
>
> > On Jan 6, 2023, at 8:16 AM, FRED BELGHAUS <fbelghaus at gmail.com> wrote:
> >
> > Rick, you are probably correct.  I recall at least one prior problem
> with WWRU's signal several years ago.
> >
> > Their programming is in the Korean language (according to Wiki).  If
> that's what you're hearing, BINGO.
> > WADO's programming is Spanish, and has been for many years.
> >
> > 73,
> >
> > Fred W2AAB
> >
> > On Fri, Jan 6, 2023 at 7:56 AM Rick Lapp <rick at ricklapp.net <mailto:
> rick at ricklapp.net>> wrote:
> >> Frank,
> >> 1660 +10dB
> >> 620 S4
> >> 1010 +10dB
> >> 1190 S6
> >>
> >>
> >> > On Jan 6, 2023, at 7:36 AM, Frank W3LPL <donovanf at starpower.net
> <mailto:donovanf at starpower.net>> wrote:
> >> >
> >> > Rick,
> >> >
> >> > If you're hearing more than one audio stream on 1940 kHz
> >> > do you also hear program content from:
> >> >
> >> >     1660 kHz  WWRU   or
> >> >      620      WSNR
> >> >     1010      WINS
> >> >     1190      WLIB
> >> >
> >> > tks
> >> >
> >> > 73
> >> > Frank
> >> > W3LPL
> >> >
> >> >
> >> > ----- Original Message -----
> >> > From: "Rick Lapp" <rick at ricklapp.net <mailto:rick at ricklapp.net>>
> >> > To: "topband" <topband at contesting.com <mailto:topband at contesting.com
> >>
> >> > Sent: Friday, January 6, 2023 12:07:50 PM
> >> > Subject: Re: Topband: 1940 kHz Intruder
> >> >
> >> > I’m fairly confident that I’ve identified the signal to be coming
> from 1660 kHz, WWRU in Jersey City NJ. There is considerable fading but I
> confirmed the source by listening to the programming, switching back and
> forth between two VFOs on the TS890.
> >> >
> >> > I’m located in Eastern Long Island, NY about 50 miles east of NYC.
> The 1660 signal is well over S9 and the 1940 is S4-5 max. At times, the
> signal changes abruptly in amplitude.
> >> >
> >> > Rick, KC2FD
> >> >
> >> >
> >> >> On Jan 5, 2023, at 10:23 PM, FRED BELGHAUS <fbelghaus at gmail.com
> <mailto:fbelghaus at gmail.com>> wrote:
> >> >>
> >> >> If we mix 1280 and 1660 we get these 2 stations:
> >> >>
> >> >> 1280 WADO 50 kW Day / 7200 W Night (Licensed to NYC) but transmitter
> in
> >> >> Carlstadt, NJ
> >> >> 1660 WWRU 10 kW Day & Night Jersey City, NJ
> >> >>
> >> >> (Info via): http://mesamike.org/radio/cdbs/amdb.mvc
> >> >>
> >> >> These stations are about 12 miles apart.
> >> >>
> >> >> Fred W2AAB
> >> >>
> >> >> On Thu, Jan 5, 2023 at 12:21 PM Joe Subich, W4TV <lists at subich.com
> <mailto:lists at subich.com>> wrote:
> >> >>
> >> >>> On 2023-01-05 11:26 AM, A J wrote:
> >> >>>
> >> >>>> It sounds like two station are there possibly more.
> >> >>>
> >> >>> Intermodulaton (mixing) ...
> >> >>>
> >> >>>> I heard a frequency 1610khz  said.
> >> >>>
> >> >>> You have two frequencies, solve for the third.
> >> >>>    1940 = 2 * x - 1610 = 1775 (out of band)
> >> >>> or  1940 = 2 * 1610 - x = 1280
> >> >>>
> >> >>> I would start looking at the allocations for a community
> >> >>> where you have a 1610 and 280 close together (preferably
> >> >>> co-located).
> >> >>>
> >> >>> 73,
> >> >>>
> >> >>>   ... Joe, W4TV
> >> >>>
> >> >>> On 2023-01-05 11:26 AM, A J wrote:
> >> >>>> Hi All
> >> >>>>
> >> >>>> It sounds like two station are there possibly more.
> >> >>>>
> >> >>>> I heard a frequency 1610khz  said.
> >> >>>>
> >> >>>> No directional antenna to the south east. Just North and NE nothing
> >> >>>> heard on those. It is heard on the inverted V at varying levels.
> >> >>>>
> >> >>>> The info draws a picture. See link below.
> >> >>>>
> >> >>>> https://www.contesting.com/data/profile/ve3hj/photo.jpeg
> >> >>>>
> >> >>>>
> >> >>>> AJ___ VE3HJ
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>> On 1/5/23 00:09, Frank W3LPL wrote:
> >> >>>>> Hi Jim,
> >> >>>>>
> >> >>>>> No one has yet reported a strong enough signal to be sure if its a
> >> >>> mixing
> >> >>>>> product or a harmonic.  Because everyone -- so far -- is
> reporting a
> >> >>> weak
> >> >>>>> signal I suspect its a mixing product.  Two reporters said that
> the
> >> >>> audio
> >> >>>>> is badly distorted and appears to carrying two programs.
> >> >>>>>
> >> >>>>> The signal it too weak here for me to analyze.
> >> >>>>>
> >> >>>>> It appears to radiate from the vicinity on northern NJ, NY City or
> >> >>>>> southern NY
> >> >>>>>
> >> >>>>> Perhaps a Topbander is that vicinity will report a stronger signal
> >> >>>>>
> >> >>>>> 73
> >> >>>>> Frank
> >> >>>>> W3LPL
> >> >>>>>
> >> >>>>> ----- Original Message -----
> >> >>>>> From: "K9YC" <jim at audiosystemsgroup.com <mailto:
> jim at audiosystemsgroup.com>>
> >> >>>>> To: "topband" <topband at contesting.com <mailto:
> topband at contesting.com>>
> >> >>>>> Sent: Thursday, January 5, 2023 4:48:50 AM
> >> >>>>> Subject: Re: Topband: 1940 kHz Intruder
> >> >>>>>
> >> >>>>> I'm much too far away to hear anything, but the obvious question
> is, "is
> >> >>>>> it a harmonic or a mix?"  So is anyone hearing it loud enough to
> tell if
> >> >>>>> there are two programs or only one?
> >> >>>>>
> >> >>>>> 73, Jim K9YC
> >> >>>>>
> >> >>>>> On 1/4/2023 7:04 PM, samjos at epix.net <mailto:samjos at epix.net>
> wrote:
> >> >>>>>>> From NE PA FN11VF bearing is roughly NNE. Too distorted to make
> out.
> >> >>>>>>
> >> >>>>>> _________________
> >> >>>>>> Searchable Archives: http://www.contesting.com/_topband -
> Topband
> >> >>>>>> Reflector
> >> >>>>>>
> >> >>>>>> --
> >> >>>>>> Knowledge is Power and Power is Knowledge.___AJ___1967
> >> >>>> _________________
> >> >>>> Searchable Archives: http://www.contesting.com/_topband - Topband
> >> >>> Reflector
> >> >>> _________________
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> >> >>> Reflector
> >> >>>
> >> >> _________________
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> Reflector
> >> >
> >> > _________________
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> Reflector
> >>
> >> _________________
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>
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