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281. LF: 500kHz simple 5W TX/RX transverter (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Tue, 8 Dec 2009 00:20:13 +0000
Dear All, My WSPR tx up-converter has now been modified to a full TX/RX tranverter suitable for WSPR, QRSS and CW  in a very simple way, making use of the FT817 split facility which allows you to RX
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00699.html (11,594 bytes)

282. Re: LF: WSPR LA3? (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sat, 9 Jan 2010 19:30:41 +0000
Dead End mode The freq is swamped by repeative data from several stations that are strong enough to work in either QRS3 or CW MODE. G3KEV   -- Original Message -- From: [email protected] [email protected]
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00010.html (13,939 bytes)

283. LF: WSPR stations in central Europe - please listen through the night (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Tue, 19 Jan 2010 23:09:36 +0000
All, I'm going to leave my 500kHz WSPR beacon running through the night for a few more nights. Beating my personal 1000kms barrier seems to be limited not by my low 1mW ERP, but by an absence of stat
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00031.html (10,610 bytes)

284. Re: LF: Cat Whiskers (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Fri, 15 Jan 2010 14:07:29 +0000
They come from Alpha Centauri and mean peace..... :-) 73s Roger G3XBM 2010/1/15 Rik Strobbe <[email protected]> I have seen them on the KL1X 500kHz grabber once or twice 73, Rik  ON7YD - OR
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00049.html (12,169 bytes)

285. Re: LF: RE: WSPR_test (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Fri, 15 Jan 2010 22:28:24 +0000
Dear Lubos, These are my unique reports in the last hour. I'm being heard! Good luck tonight. Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az  2010-01-15 22:02   G3XBM   0.503904   -25   0
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00050.html (20,313 bytes)

286. Re: LF: JT4A simple guide? (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sat, 23 Jan 2010 16:52:16 +0000
73s Roger G3XBM On 23 January 2010 14:26, Andy Talbot <[email protected]> wrote: AFAIK The is no 'simple guide'   JT4x was never originally going to be one of Joe's supported modes, although
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00101.html (20,314 bytes)

287. Re: LF: WSPR, QRSS, CW... (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sun, 10 Jan 2010 22:42:41 +0000
Dear Stefan, You are, in the end, correct and I am sure that Mal G3KEV will already be writing his response in support of you email, HI. However, my own experience has been that WSPR has made possibl
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00112.html (16,445 bytes)

288. Re: LF: G3XBM (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Wed, 20 Jan 2010 22:24:41 +0000
Yeh ! Congratulations Roger.   Lubos you have the Water Pistol, can you now RX a tiny Dripping Tap, my QRPp 200uW ERP is on..   73   Eddie G3ZJO   --Original Message-- From: owner-rsgb_lf_group@blac
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00124.html (16,803 bytes)

289. Re: LF: G3XBM & Anti Social ssb (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sun, 3 Jan 2010 20:04:32 +0000
Hi Peter (and all LF) My point on WSPR is a serious one and I think you've either not followed my logic or understood how bandwidth efficient WSPR is. Let me spell it out again... Within just 200Hz o
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00127.html (17,239 bytes)

290. Re: LF: RE: 500kHz tonight (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Fri, 8 Jan 2010 09:15:56 +0000
Let me update group members on the results to date with my 1mW ERP 500kHz WSPR station so far.... Since starting on 500kHz a few months ago with what is, by any measure, a TINY station in all respect
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00145.html (13,762 bytes)

291. Re: LF: Re: 500kHz WSPR overnight (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sun, 10 Jan 2010 21:28:50 +0000
  I'm afraid one of us two will have to move his qth or antenna by 10km. -:) Anyway, new distance record for you!   73 Clemens DL4RAJ    2010-01-09 00:02   G3XBM   0.503897   -23   0   JO02dg   0.00
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00154.html (19,165 bytes)

292. LF: G3XBM's ERP on 500kHz (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sat, 23 Jan 2010 13:02:42 +0000
All, Yesterday I did a recalculation of the G3XBM ERP based on the classic formula and re-measurements of my antenna current. My antenna is a 5m long vertical with a spiral top hat of about 7 turns a
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00161.html (10,098 bytes)

293. Re: LF: G3XBM's ERP on 500kHz (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sat, 23 Jan 2010 14:46:25 +0000
The simulation gives a radiation resistance of 0.074 Ohm, so with 0.12 A a radiated power just over 1mW EMRP (1.75mW ERP). In the real world it will be some dB's less (as Jim stated recently), probab
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00174.html (12,733 bytes)

294. Re: LF: Re: 500 kHz WSJT JT4A (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Tue, 19 Jan 2010 20:20:06 +0000
You've got a good signal on the Twente receiver, Gary. At least - I assume that it's you, it's the correct frequency. Can't decode it, of course. Martin  GW3UCJ. -- http://g3xbm-qrp.blogspot.com/ htt
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00188.html (12,798 bytes)

295. Re: LF: 2nd try of sending the pic of my loop preamp with the BF862 (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Sat, 30 Jan 2010 19:56:11 +0000
Dear LF,   Some OMs informed me, that the picture of the loop preamp is in a strange design. That may be come, since i (have to) use outlook exchange (?)   Now i try to do it again. Those who asked
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00219.html (12,739 bytes)

296. Re: LF: RE: WSPR_OK (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Wed, 20 Jan 2010 20:56:30 +0000
1200km!!!!  new record for me!!   With best regards     Jim From: [email protected] [mailto:[email protected]] On Behalf Of Lubos OK2BVG Sent: 20 January 2010 19:24
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00228.html (14,296 bytes)

297. Re: LF: G3XBM (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Wed, 20 Jan 2010 22:07:06 +0000
Hello Roger, LF! This moment is just now: 2136  -7  0.2   0.503874  0 G4JNT IO90 23 2142 -29 -0.5   0.503910  1 G3XBM JO02 0 Congratulation! Lubos, OK2BVG, JN88KS Windows 7: Který poíta je pro vás t
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00242.html (11,982 bytes)

298. Re: LF: about guns, water pistols and dripping tabs (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Thu, 21 Jan 2010 13:25:03 +0000
Hi Rik, This is most interesting. I notice that M0BMU was running with 50mW ERP last night, so it might be worth plugging in his reports as well for last night. My ERP was based on (a) field strength
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00297.html (17,086 bytes)

299. Re: LF: Re: G4JNT Beacon WSPR parameters changed (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Fri, 1 Jan 2010 21:38:33 +0000
Very strong here in East Cambs Jim (+8/+9dB S/N). 73s and happy NY to all Roger G3XBM 2010/1/1 James Moritz <[email protected]> Dear LF Group, Now QRV in WSPR mode on 502.4kHz "dial freque
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00318.html (10,816 bytes)

300. LF: Further DX reports from OK land (score: 1)
Author: Roger Lapthorn <[email protected]>
Date: Thu, 21 Jan 2010 21:57:55 +0000
Lubos is listening again on 500kHz and has spotted my WSPR signal again:  2010-01-21 21:32   G3XBM   0.503906   -26   0   JO02dg   0.001   OK2BVG   JN88ks   1232   102   2010-01-21 20:50   G3XBM   0.
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-01/msg00346.html (10,766 bytes)


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