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Hi Roman,
I do not know where the signal came from, I think it must have been generated with the other sound card. The strange thing was that it was not there during daylight.
Having just stated that about signal not there during daylight, the street light outside nearby has just developed a fault, it now keeps going off for 30 to 60 seconds & coming back on again.
The "signal" could be due to the faulty street light, waiting now for the local authority engineers to repair the light. When it has been repairedI can connect back to the other sound card & check.
73,
Gary - G4WGT.
2010/1/20 Roman RW3ADB <[email protected]>
Hi Gary, LF!
OK, I'm understood.
There is no any ideas what is a signal?
Roman
* Gary - G4WGT <[email protected]> [Fri, 15 Jan 2010 10:24:36 +0000]:
Roman, LF,
I realise I have resolved the issue of the "signal" but the spectrum
line
that appeared at the bottom of the display looked like it was a
repeated
1
minute segment. It was in fact a continuous signal which was broken
into
1
minute lengths by the time label at the bottom which is in a black box
for
clearer display.
73, Gary - G4WGT
2010/1/14 Roman RW3ADB <[email protected]>
> Hi Gary, LF!
> TNX to all for the details and participation in identification.
> I thought about an NDB, but signal was so very long 1 minute.
> Is't real to be an NDB ID.
> Some time he was like a carrier on the screen.
>
> * Gary - G4WGT <[email protected]> [Thu, 14 Jan 2010 20:10:59
+0000]:
>
>> Hi All at LF,
>>
>> Update on previous mails regarding 498.800 kHz.
>>
>> The signal is not really there, I tried to Rx it on my "real"
radios
>> using
>> my 500 kHz vertical & there was nothing there. I was able to Rx a
>>
> couple
>
> Do you tried to rx today or yesterday?
> That signal is absent today on the grabber.
>
> of
>> NDB's a little lower at good strength but nothing on 498.800 kHz.
Yet
>>
> it
>
>> was
>> there good & strong on the SoftRock SDR I use for the grabber.
>>
>> My next move was to connect to another sound card & not only was
the
>> signal
>> not there on 498.800 kHz a great deal of hash & other interference
had
>> disappeared as well.
>>
>> You will notice a much better display now on the grabber, the sound
>>
> card
>
>> is
>> an external Creative Sound Blaster Live 24 bit.
>>
>> 73, Gary - G4WGT.
>>
>>
>>
>> 2010/1/14 Gary - G4WGT <[email protected]>
>>
>> > Hi Tracey,
>> >
>> > Thanks, I have looked at the list & the nearest is the following
>>
> UNID
>
>> :-
>> >
>> >
>>
>> 498.7<
>
http://www.classaxe.com/dx/ndb/reu/?mode=signal_list&filter_khz_1=498.7&filter_khz_2=498.7&limit=-1
> >
>
>> > *NT* 0 UNID
>>
>>
XUU< http://www.classaxe.com/dx/ndb/reu/?mode=signal_list&filter_itu=XUU>
>
>> > UNID ENG IRL *2* 2005-08-28
>> > Not sufficient info at the moment, I will see if I can copy an ID
>> when/if
>> > it gets strong enough.
>> >
>> > 73, Gary - G4WGT.
>> >
>> >
>> >
>> > 2010/1/14 Tracey Gardner <[email protected]>
>> >
>> > Hello Gary
>> >>
>> >> Have you checked the REU list for your signal?
>> >>
>> >> http://www.classaxe.com/dx/ndb/reu/
>> >>
>> >> If you do a search between 497kHz and 500kHz you'll find that
there
>> are a
>> >> good number of unid NDBs in that area.
>> >>
>> >> Tracey
>> >>
>> >>
>> >> ----- Original Message -----
>> >> *From:* Gary - G4WGT <[email protected]>
>> >> *To:* [email protected]
>> >> *Sent:* Thursday, January 14, 2010 11:53 AM
>> >> *Subject:* Re: LF:498.8
>> >>
>> >> Hi Roman, LF,
>> >>
>> >> I have also noticed the signal on 498.800 kHz.
>> >>
>> >> I have looked back at 3 days grabber saves & the signal fades in
at
>> about
>> >> 1530utc & fades out at about 0700utc the following morning. At
>>
> times
>
>> there
>> >> appears to an accompanying parallel signal about 1 kHz higher
which
>> looks
>> >> like an NDB ID (see attachment), but nothing on my lists for an
NDB
>> on that
>> >> frequency.
>> >>
>> >> I will set up another SpecLab to monitor that frequency & a few
kHz
>> either
>> >> side to watch for an ID type signal on the LF side as well as
the
>>
> HF
>
>> side of
>> >> the carrier. I will report my findings to LF for anyne who may
be
>> >> interested.
>> >>
>> >> 73, Gary - G4WGT.
>> >>
>> >>
>> >> 2010/1/14 Roman RW3ADB <[email protected]>
>> >>
>> >>>
>> >>> Hi LF!
>> >>> What is a signal are visible onto G4WGT grabber around 498.8
kHz?
>> >>> http://rw3adb.narod.ru/2010/20100113_498.8/capt500-4.jpg
>> >>> http://rw3adb.narod.ru/2010/20100113_498.8/capt500-4.1.jpg
>> >>>
>> >>> --
>> >>> Roman RW3ADB.
>> >>>
>> >>>
>> >>
>> >
>>
>
>
>
>
> --
> Roman RW3ADB.
>
>
Roman RW3ADB.
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