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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+QRM\s+498\-502\s+kHz\s*$/: 17 ]

Total 17 documents matching your query.

1. Re: LF: QRM 498-502 kHz (score: 1)
Author: gm4slv <[email protected]>
Date: Wed, 6 Oct 2010 17:53:53 +0100
Hello Paul-Henrik! I can see no sign of the signal yet, at 16:45UTC! (Just SM6BGP testing) I'm going to try making a passive tuned multi-turn loop tonight and see if I can use it to get a bearing. I
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00131.html (10,984 bytes)

2. Re: LF: QRM 498-502 kHz (score: 1)
Author: John P-G <[email protected]>
Date: Wed, 6 Oct 2010 23:52:04 +0100
Still fairly weak, again, here in Shetland. It's fading up and down, with some degree of frequency selective fading. My grabber should be accesible at: http://dl.dropbox.com/u/3551430/gm4slv.jpg I'm
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00176.html (10,420 bytes)

3. Re: LF: QRM 498-502 kHz (score: 1)
Author: Paul-Henrik <[email protected]>
Date: Wed, 06 Oct 2010 11:35:38 +0300
Hello John, Lee & co. The wideband noise was audible again last night in Vaasa, Finland for 20 to 30 minutes. I checked the time once and it was past 01.00 local time, so past 2200UTC. There was clea
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00313.html (12,397 bytes)

4. Re: LF: QRM 498-502 kHz (score: 1)
Author: John P-G <[email protected]>
Date: Wed, 6 Oct 2010 07:40:15 +0100
Thanks Lee. I could only watch the LF edge on my own grabber. I'll look at the HF edge tonight perhaps. It appears that there's a wideish carrier at the LF side of the noise-like modulated signal at
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00326.html (10,841 bytes)

5. Re: LF: QRM 498-502 kHz (score: 1)
Author: "Martin Evans" <[email protected]>
Date: Wed, 6 Oct 2010 18:47:16 +0100
I can see it in Swansea IO81CR Using SDR-IQ, SDR-Radio software, 100m loop ant roughly E-W. clearly visible, with hints of what appears to be a 7-second flutter together with some much slower fading.
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00388.html (11,263 bytes)

6. Re: LF: QRM 498-502 kHz (score: 1)
Author: "Graham" <[email protected]>
Date: Wed, 6 Oct 2010 00:29:46 +0100
Looks like 'we' are in for a interesting winter window .. ! Its possible that the signal is beamed , so signal levels may no give a true guide ? Don't quite know why wspr has started on 501 , we did
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00424.html (10,720 bytes)

7. Re: LF: QRM 498-502 kHz (score: 1)
Author: "Graham" <[email protected]>
Date: Tue, 5 Oct 2010 11:36:23 +0100
I wonder if John up in the Shetlands can take a bearing ? , that with Finbars would be a good 'fix' G. From: [email protected] Graham Sent: Tuesday, October 05, 2010 12:56 AM To: rsgb_lf_group@
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00436.html (13,170 bytes)

8. LF: QRM 498-502 kHz (score: 1)
Author: "Lee Hudson" <[email protected]>
Date: Mon, 4 Oct 2010 23:12:37 +0100
Hi All, 22:07 UTC Is everyone seeing the 4kHz wide COFDM signal centred on 500kHz currently about 20dB over the noise here. Appears on G3YXM's Grabber too. SM6BGP managing to appear over the top of i
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00501.html (11,423 bytes)

9. RE: LF: QRM 498-502 kHz (score: 1)
Author: "Lee Hudson" <[email protected]>
Date: Tue, 5 Oct 2010 23:38:51 +0100
Hi John, Roelof, Graham, and all, Set up the grabber here so you can see the signal I refer. Notably it doesn't seem as strong as yesterday and with considerably more QSB. http://www.m0lmh.co.uk/grab
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00505.html (11,485 bytes)

10. Re: LF: QRM 498-502 kHz (score: 1)
Author: "Roelof Bakker" <[email protected]>
Date: Tue, 05 Oct 2010 22:52:50 +0200
Hello John, I might have to think about a Perseus now, to look at wider areas.<<< To wet your appetite, you might also consider Tony Park's RX LF Ensemble kit. Used with Winrad or the just released W
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00600.html (10,952 bytes)

11. Re: LF: QRM 498-502 kHz (score: 1)
Author: "Albert" <[email protected]>
Date: Tue, 5 Oct 2010 12:16:23 +0200
LS. In the north of the Netherlands (JO33DE) the max. signal is about 10 dB over my noise level. (at night time and using my tuned TX L-antenna, V18m/H32m). Using my loop the signal is too weak for a
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00648.html (9,292 bytes)

12. Re: LF: QRM 498-502 kHz (score: 1)
Author: John P-G <[email protected]>
Date: Tue, 5 Oct 2010 21:17:07 +0100
G, LF, Unfortunately (or not) I can't hear the offending signal here. There are certainly a few odd carriers & noises around the area that I don't remember as being there last time I payed a lot of a
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00680.html (10,198 bytes)

13. Re: LF: QRM 498-502 kHz (score: 1)
Author: "Roelof Bakker" <[email protected]>
Date: Tue, 05 Oct 2010 11:11:13 +0200
Hello Lee, This signal is very weak in the south western part of the Netherlands. It is only audible at night and too weak to make a proper bearing. It is a weak daytimer near Brest in Brittany, Fran
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00692.html (9,871 bytes)

14. Re: LF: QRM 498-502 kHz (score: 1)
Author: "Graham" <[email protected]>
Date: Tue, 5 Oct 2010 00:56:07 +0100
Lee Its been on for a while , we did have odd carriers up to 502 over the last weeks as well , may of been some form of test , its showing a the delft web sdr as well as Birmingham at the moment .240
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00714.html (12,198 bytes)

15. RE: LF: QRM 498-502 kHz (score: 1)
Author: "Lee Hudson" <[email protected]>
Date: Wed, 6 Oct 2010 18:30:20 +0100
Hi John, LF, It's there now and I've just restarted the grabber. Only just over the noise here, but expect it to pick up later on. 73, Lee M0LMH. Hello Paul-Henrik! I can see no sign of the signal ye
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00722.html (12,594 bytes)

16. Re: LF: QRM 498-502 kHz (score: 1)
Author: "Roelof Bakker" <[email protected]>
Date: Tue, 05 Oct 2010 22:47:10 +0200
It seems strange that I can't hear it but that might help rule in/out a possible location? I'll keep looking. I spoke too soon! I think I can see it on a waterfall now, but using a passive wire ante
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00741.html (11,310 bytes)

17. Re: LF: QRM 498-502 kHz (score: 1)
Author: John P-G <[email protected]>
Date: Tue, 5 Oct 2010 21:41:22 +0100
I spoke too soon! I think I can see it on a waterfall now, but using a passive wire antenna. Whether the ALA1530 loop has a low enough noise floor to use it to DF is a moot point. I'll keep an eye on
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-10/msg00743.html (10,536 bytes)


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