Re: LF:498.8

[Gary - G4WGT <g4wgt@tiscali.co.uk>]

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 <rw3adb@rambler.ru>

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 <g4wgt@tiscali.co.uk> [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 <g4wgt@tiscali.co.uk>

> 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 <tracey.gardner@talktalk.net>
>
>  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 <g4wgt@tiscali.co.uk>
>> *To:* rsgb_lf_group@blacksheep.org
>> *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 <rw3adb@rambler.ru>
>>
>>>
>>> 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.