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121. Re: LF: Re: CORRECTION regarding 2E0ILY-N1BUG QSO (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Fri, 30 Mar 2018 16:47:47 +0100; Quote: "The Experimenters Radio Licence allows the licensee to participate in what is predominately a hobby, but can be a service also, providing communications for emergencies and disasters when nee; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-03/msg00387.html (11,978 bytes)
122. Re: LF: old CIA-Report about VLF-EARTH-CURRENT-COMMUNICATION (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Fri, 22 Jun 2018 15:40:27 +0100; Thanks for finding this Eike. 73s Roger G3XBM On 19 June 2018 at 18:41, [email protected] <[email protected]> wrote: :-O --Messaggio originale-- Da: [email protected] Data: 19-giu-2018 16.56 A: <rsgb; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-06/msg00128.html (10,340 bytes)
123. Re: LF: RE: MF/630 (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Sun, 1 Jul 2018 16:09:16 +0100; Couldnt hear you down here in Sri Lanka Mal! Mind you, I dont have a radio with me. From: [email protected] [mailto:[email protected]] On Behalf Of g3kevmal@; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-07/msg00005.html (11,599 bytes)
124. LF: 472kHz WSPR RX (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Sun, 1 Jul 2018 22:32:36 +0100; For a total change, I am monitoring 472kHz WSPR. I should be on all night. 73s Roger G3XBM; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-07/msg00006.html (7,995 bytes)
125. Re: LF: RE: Summer games / EARTH ANTENNAS (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 10 Jul 2018 12:10:40 +0100; Am 04.07.2018 18:51, schrieb VIGILANT Luis Fernández: Mmmm. Kite antennas are for summer ;-) What? Ehm, no. They are for winter! :-) See: http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/300m%20VLF; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-07/msg00052.html (14,419 bytes)
126. Re: VLF: Earth antenna transmissions on a guide rail?!?? 2nd day... (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Mon, 30 Jul 2018 21:04:18 +0100; Well done Stefan. Still at the frontiers! 73s Roger G3XBM On 30 July 2018 at 20:31, DK7FC <[email protected]> wrote: Hi VLF and ULF friends, In the attachment you can find 3 spectrograms from tr; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-07/msg00213.html (17,372 bytes)
127. LF: PA0RDT email? (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 4 Sep 2018 10:49:45 +0100; Just wondering if anyone has a recent email address for Rodolf? If so, please could you email me with it? I have an idea that I am using the wrong address. BTW, back on 472kHz WSPR again soon! Thank; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00030.html (8,139 bytes)
128. LF: PA0RDT email (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 4 Sep 2018 11:49:39 +0100; To those that helped, thank you. I was using an old address! BTW, I am getting a message saying "beware, this may be a spoofed email" (mine that is). Not sure why this is occurring as this is most de; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00032.html (8,330 bytes)
129. LF: Active on 472kHz WSPR (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Mon, 10 Sep 2018 18:35:09 +0100; Although later this season I intend to concentrate on 137kHz and 472kHz RX with a PA0RDT mini-whip, I am again (first time this season) on 472kHz WSPR (TX and RX) with my earth electrode "antenna" in; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00134.html (8,482 bytes)
130. LF: 472kHz FT8 QSO? (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 11 Sep 2018 15:21:46 +0100; After the success last night on 472kHz WSPR (10mW ERP) with the earth-electrode "antenna" in the ground, I may try 472kHz FT8 this evening. If you fancy a try please give me a call on FT8. I shall t; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00145.html (8,900 bytes)
131. Re: LF: 472kHz FT8 QSO? (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 11 Sep 2018 15:52:31 +0100; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00147.html (11,870 bytes)
132. Re: LF: RE: 472kHz FT8 QSO? (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 11 Sep 2018 16:52:27 +0100; Hi Jim Trying to rattle your windows now on 474.2 FT8 73 gl de MAL/G3KEV From: [email protected] James Cowburn Sent: Tuesday, September 11, 2018 4:14 PM To: [email protected] rs; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00151.html (15,785 bytes)
133. Re: LF: RE: 472kHz FT8 QSO? (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 11 Sep 2018 16:51:11 +0100; Hi Roger What was your earth loop set up? Is it on your blog? Good to see you giving the bands a bashing! J with best regards Jim Dr. Jim Cowburn G7NKS IO92ub Biggleswade UK; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00152.html (14,225 bytes)
134. Re: LF: RE: 472kHz FT8 QSO? (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 11 Sep 2018 17:16:59 +0100; Hi Jim Trying to rattle your windows now on 474.2 FT8 73 gl de MAL/G3KEV From: [email protected] James Cowburn Sent: Tuesday, September 11, 2018 4:14 PM To: [email protected] rs; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00156.html (16,152 bytes)
135. LF: 472kHz FT8 (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Tue, 11 Sep 2018 19:07:46 +0100; Although Mal was -9/-10dB S/N with me on FT8 calling CQ, he failed to copy me. For now I am back on 472kHz WSPR, although I usually try the 70cm UKAC with my QRP and 2m halo. After that I shall proba; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00161.html (8,273 bytes)
136. Re: SLF: Receiving the American power grid? (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Wed, 21 Nov 2018 14:21:25 +0000; Yes, I can see it faintly.It would be good to look at 60Hz in a much narrower bandwidth? 73s Roger G3XBM On Wed, 21 Nov 2018 at 13:17, DK7FC <[email protected]> wrote: Hi SLF friends, Take a loo; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-11/msg00487.html (10,285 bytes)
137. LF: WSJT 2.0 (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Sat, 1 Dec 2018 18:14:55 +0000; If, like me, you enjoy FT8 and use WSJT-X V2.0 please be aware that rc4 no longer works after Nov 30th. There is a newer release candidate that is reported to be very close to what will be the releas; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-12/msg00014.html (9,635 bytes)
138. Re: LF: 8270 (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Thu, 27 Jun 2013 18:29:14 +0100; Gm LF, The TXis on freq.8270 0,6 amp antenne current ant 14 meter slooper with topload,and they keep the mast erectit, henny cpm... -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-06/msg00203.html (11,545 bytes)
139. Re: LF: ELF antenna ERP calculations - request for resend of information (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Sat, 8 Jun 2013 21:23:28 +0100; Roger, Tom, the paper by A. Fraser-Smith and P. Bannister is on the Stanford site http://www-ee.stanford.edu/~acfs/82Hz.pdf Best 73, Markus (DF6NM) From: [email protected] DK1IS Sent: Saturday, June; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-06/msg00252.html (13,879 bytes)
140. LF: ELF antenna ERP calculations - request for resend of information (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Sat, 8 Jun 2013 17:15:29 +0100; Some months ago - time flies, so it may have been last year - someone kindly sent me a copy of a paper, or at least a formula, to work out the radiated power (as opposed to other forms of signal tran; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-06/msg00280.html (10,619 bytes)

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