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321. Re: LF: RE: 500kHz tonight (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Fri, 8 Jan 2010 17:05:26 +0000
Hello Roger, I have been almost 24/24 receiving wspr over the past days, a monitoring period of 126 hours between Jan 2nd 17UTC and Jan 8th 09UTC, what produced some interesting facts: - over this a
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00647.html (16,386 bytes)

322. Re: LF: 500 kHz JT4A (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Fri, 22 Jan 2010 22:42:57 +0000
Gary, OK, I just decoded you (see previous mail). But signals are that strong that CW would be armchair copy. I guess I have to figure out the sync problem (as I understand a good value would be 20 o
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00705.html (17,187 bytes)

323. LF: The power of WSPR (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sun, 10 Jan 2010 20:07:11 +0000
As an illustration of why I am so "sold" on WSPR, take this example from a few minutes ago when a single transmission burst with my ultra-tiny 1mW ERP station resulted in no less than 8 simultaneous
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00706.html (15,392 bytes)

324. Re: LF: 1/2 wave 500 (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Thu, 14 Jan 2010 16:35:09 +0000
Hi Has anyone in the USA tried a 1/2 wave dipole on 500 K/cs? inv V design, at a modest height around 100 ft. de mal/g3kev     -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.you
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00714.html (11,808 bytes)

325. Re: LF: Callsigns (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Tue, 5 Jan 2010 17:41:45 +0000
Mal, So you've no strong views on slow QRS modes. That's good.. 73s Roger 2010/1/4 mal hamilton <[email protected]> Chris QRS 3 is manageable for a full call but when it gets to QRS 60, 120, 240
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00722.html (13,672 bytes)

326. Re: LF: WSPR_XBM (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sun, 31 Jan 2010 09:20:27 +0000
Hello Roger, LF! You was successful with your TX 1mW here in JN88KS last night. My PC decoded your signal: 0344 -26  1.3   0.503898  0 G3XBM JO02 0 I hope, I will see your signal in the night again.
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00729.html (10,703 bytes)

327. Re: LF: Link budget calculation or estimation of dist for given power on WSPR (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sun, 10 Jan 2010 19:54:56 +0000
Do we know how many dB loss (over land and over sea) for a single hop Rik? 73s Roger G3XBM 2010/1/10 Rik Strobbe <[email protected]> Jim, if ionoshperic propagation is involved signal stren
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00760.html (15,059 bytes)

328. Re: LF: JT4A simple guide? (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sat, 23 Jan 2010 14:43:09 +0000
  http://www.physics.princeton.edu/pulsar/K1JT/WSJT_User_600.pdf  http://www.physics.princeton.edu/pulsar/K1JT/wsjt.html http://www.physics.princeton.edu/pulsar/K1JT/JT2_JT4.TXT   Its still debatable
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00827.html (17,061 bytes)

329. Re: LF: Anti Social ssb (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sat, 2 Jan 2010 22:20:18 +0000
I am afraid we have a SSB beacon on 508 kcs spreading over 3 kcs wide and S9 plus with me. Beacon SM6BHZ is causing QRM to those of us trying to listen and work the East Coast USA stations. I cannot
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00830.html (12,285 bytes)

330. Re: LF: VLF_8.79 kHz (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Mon, 22 Feb 2010 17:58:27 +0000
Maybe some enterprising US hams could "borrow" the massive antenna system (if it is still up) for some <9kHz tests in much the same way some UK hams used the old Decca stations on 73kHz! Thanks - int
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00003.html (16,312 bytes)

331. Re: LF: VLF_8.79 kHz (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Mon, 22 Feb 2010 21:01:04 +0000
Thanks Andy. So they didn't actually say no, just didn't reply. 73s Roger G3XBM On 22 February 2010 20:45, Andy Talbot <[email protected]> wrote: My thoughts precisely.   The phrase attribute
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00008.html (14,740 bytes)

332. Re: LF: VLF_8.79 kHz (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Mon, 22 Feb 2010 15:29:26 +0000
Rick, Horst, et al,   I am unsure of the "official" UK position regarding operation below 9kHz. Back in the late 1960s a Test and Development Licence was required and I held two around 1970 (G9BIB an
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00030.html (13,376 bytes)

333. Re: LF: DATA (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Tue, 23 Feb 2010 16:38:06 +0000
Generally band condx vy good at present from LF to HF as far as 24 Mcs. Modes mostly CW and SSB world wide, some strong USA stns. What is noticeable is the lack of Amtor, Pactor and packet transmiss
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00057.html (13,064 bytes)

334. Re: LF: 503.600 kHz WSPR 2 way mode (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sat, 13 Feb 2010 21:03:31 +0000
73, Gary - G4WGT. -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/G3XBM G3XBM    GQRP 1678      ISWL G11088
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00163.html (10,776 bytes)

335. Re: LF: New NoV (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Thu, 11 Feb 2010 22:22:18 +0000
CW good, WSPR good too     :-)) 73s Roger G3XBM On 11 February 2010 17:11, M0FMT <[email protected]> wrote: Well done Dom   Hope to hear you soon. CW Good  ......... WSPR BAD!!  73 es GL petefmt -- O
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00215.html (12,387 bytes)

336. Re: LF: Re: 503.600 kHz WSPR (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Fri, 12 Feb 2010 15:12:52 +0000
Hi Rog   Run the WSJT7 programme and select wspr mode   If you receive a signal in the window using the spectrum display click on it and click decode   When you have callsign and locator decoded in
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00222.html (20,938 bytes)

337. Re: LF: Re: VLF TX experiments this sunday (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sun, 28 Feb 2010 17:39:26 +0000
Don't worry Tim. Knowing Mal's humorous way of expressing his views, we definitely see his interest in the matter as a positive encouragement.   And, best of all, it's fun.   Best 73, Markus, DF6NM
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00234.html (16,762 bytes)

338. Re: LF: VLF_8.79 kHz (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Mon, 22 Feb 2010 21:56:52 +0000
Rik  ON7YD - OR7T ________________________________________ Van: [email protected] [[email protected]] namens Chris Trayner [[email protected]] Verzonden: maanda
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00255.html (13,901 bytes)

339. Re: LF: VLF_8.79 kHz (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Mon, 22 Feb 2010 17:32:34 +0000
base camp below?  Couldn't our friends in NZ drive North Island and South Island as a dipole? 73, Chris G4OKW -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/G3XB
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00278.html (12,951 bytes)

340. Re: AW: LF: AW: Beaconing on 8.79 kHz in QRSS (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Mon, 22 Feb 2010 19:48:57 +0000
Most cave radio work takes place on 87kHz USB although we have sometimes used frequencies as low as 27kHz.  The maximum range we have achieved with a 4 W transmitter is about 2 1/2 kilometres. 73 Jo
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00297.html (12,769 bytes)


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