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1. Re: LF: F4DTL and G3XBM (score: 1)
Author: Roger Lapthorn <>
Date: Wed, 8 Oct 2014 19:35:22 +0100
Nicholas, Roger, Screenshot of F4DTL (475.630) and G3XBM (475.693) WSPR signals this evening. 73, Dave G3WCB IO91RM --Original Message-- From: [mailto:owner-
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-10/msg00163.html (13,652 bytes)

2. Re: LF: RE: Receiver information (score: 1)
Author: Roger Lapthorn <>
Date: Wed, 22 Oct 2014 20:17:53 +0100
Marc, For most amateur VLF work, you will do better with Spectrum Laboratory in "locked" mode i.e. locked to a VLF MSK signal. Then you can look for DAYS if need be in extremely narrow bandwidths. St
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-10/msg00280.html (12,054 bytes)

3. LF: VLF earth-mode test today (score: 1)
Author: Roger Lapthorn <>
Date: Mon, 20 Apr 2015 22:10:40 +0100
As many of you will recall I had a cerebellum brain bleed in September 2013. I was in hospital for 3.5 months and not at all well. Thankfully, I am still recovering, albeit very slowly. Today I did m
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-04/msg00134.html (10,403 bytes)

4. Re: LF: VLF earth-mode test today (score: 1)
Author: Roger Lapthorn <>
Date: Tue, 21 Apr 2015 18:29:36 +0100
Well done Joe! Keep up the good work. 73s Roger G3XBM On 21 April 2015 at 01:32, <> wrote: Hi Roger, Your TX/RX may be giving disappointing results at the moment, but your VLF web page i
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-04/msg00140.html (12,058 bytes)

5. Re: LF: Re: New QRPPP test to night on WSPR 2 MF (score: 1)
Author: Roger Lapthorn <>
Date: Mon, 27 Apr 2015 10:06:07 +0100
Congratulations. QRPPP is certainly fun and a real challenge for the RX stations. 73s Roger G3XBM On 25 April 2015 at 13:34, Guy Andr <> wrote: Muchas gracias Iban. last 3 n
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-04/msg00167.html (24,175 bytes)

6. Re: LF: G3ZJO or G3XBM ? (score: 1)
Author: Roger Lapthorn <>
Date: Fri, 3 Jul 2015 17:04:43 +0100
Stefan, I have been mainly on 10m and 6m and was away earlier this week. Are you still interested in a very weak MF signal? If so, I could move to MF later this evening (July 3rd). Of course you real
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-07/msg00028.html (10,586 bytes)

7. Re: LF: G3ZJO or G3XBM ? (score: 1)
Author: Roger Lapthorn <>
Date: Fri, 3 Jul 2015 17:23:36 +0100
Hi Roger, Thanks. There have been plenty of weak signals in the past days. Furthermore there is very high QRN and so much heat that i tend to shut down my Raspi or at least keep the CPU load as low
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-07/msg00030.html (12,002 bytes)

8. LF: Thank you (score: 1)
Author: Roger Lapthorn <>
Date: Thu, 6 Aug 2015 19:29:19 +0100
There are some really kind people in the world. I have received so many kind and caring emails in the last 18 months all wishing me a speedy recovery from my stroke. Thank you. Yesterday, in the pos
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-08/msg00022.html (9,722 bytes)

9. Re: LF: Thank you (score: 1)
Author: Roger Lapthorn <>
Date: Sat, 8 Aug 2015 20:50:54 +0100
Pat, thank you and stay strong too! BTW I expect to be doing some QRSS3 tests soon on 136kHz again - a first time at this QTH. As I am not expecting too much with my short baseline earth-electrode "a
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-08/msg00043.html (12,981 bytes)

10. LF: Back on 472kHz WSPR (score: 1)
Author: Roger Lapthorn <>
Date: Sat, 3 Oct 2015 18:43:12 +0100
OK, I know you all need a challenge! After a few nights on 472kHz RX only (with a RX preamp) I am transmitting with around 5mW ERP from the earth-electrode "antenna". On RX this seemed to work very w
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00027.html (9,165 bytes)

11. Re: LF: Back on 472kHz WSPR (score: 1)
Author: Roger Lapthorn <>
Date: Sat, 3 Oct 2015 20:21:37 +0100
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00030.html (10,278 bytes)

12. LF: GM4SLV? (score: 1)
Author: Roger Lapthorn <>
Date: Fri, 8 Jan 2016 08:21:40 +0000
Anyone know what has happened to John? He has not been on MF as far as I know this season and my email to his old address bounced last night. He lives in Shetland. HNY to all and my thanks to Mal and
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00133.html (8,984 bytes)

13. Re: LF: GM4SLV? (score: 1)
Author: Roger Lapthorn <>
Date: Fri, 8 Jan 2016 10:23:20 +0000
Dear Paul-Henrik, Just tried John's Gmail account. We'll see what happens. 73s Roger G3XBM On 8 January 2016 at 09:09, <> wrote: Hello Roger, LF Did you try the address on this page? ht
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00135.html (10,775 bytes)

14. Re: LF: 2200m Plots of the whole Band (score: 1)
Author: Roger Lapthorn <>
Date: Fri, 8 Jan 2016 20:42:11 +0000
"for the 74kHz experiments 2 years ago" What were these please? 73s Roger G3XBM On 8 January 2016 at 20:16, Hartmut Wolff <> wrote: Markus, thanks for your reply. Hartmut as you are fai
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00149.html (11,089 bytes)

15. LF: John GM4SLV (score: 1)
Author: Roger Lapthorn <>
Date: Tue, 12 Jan 2016 22:58:39 +0000
Has anyone got any recent news about John please? I have tried 2 email addresses for him and have got nothing back. It would be reassuring to hear something. As it is, I fear something is amiss up in
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00218.html (9,365 bytes)

16. Re: LF: Re: John GM4SLV (score: 1)
Author: Roger Lapthorn <>
Date: Tue, 12 Jan 2016 23:33:30 +0000
Hi, Roger. Take a look at this APRS site. GM4SLV is reporting position as 13mi NW of Lerwick. So Lerwick's still there, at least! http://aprs.fi/info/a/GM4SLV 73, Dave G3WCB IO80DI -- Original M
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00222.html (12,124 bytes)

17. Re: LF: John GM4SLV (score: 1)
Author: Roger Lapthorn <>
Date: Wed, 13 Jan 2016 18:23:21 +0000
I hope hes okay. Had a few WSPR spots with him back in 2009. Nice chap. From: [mailto:] On Behalf Of pat Sent: 13 January 201
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00236.html (15,016 bytes)

18. Re: LF: John GM4SLV (score: 1)
Author: Roger Lapthorn <>
Date: Thu, 14 Jan 2016 10:57:57 +0000
I hope hes okay. Had a few WSPR spots with him back in 2009. Nice chap. From: [mailto:] On Behalf Of pat Sent: 13 January 201
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00244.html (15,934 bytes)

19. Re: LF: Earth modes and ebnaut? (score: 1)
Author: Roger Lapthorn <>
Date: Thu, 2 Jun 2016 21:29:36 +0100
Chris, Some years ago (before my stroke!) I had correspondence with OFCOM about earth-mode (through the ground conduction) communication at VLF. Basically they did not want to know and were not at al
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-06/msg00012.html (13,410 bytes)

20. Re: LF: Good reception on 630m last night (score: 1)
Author: Roger Lapthorn <>
Date: Sun, 21 Aug 2016 13:18:25 +0100
Good night for WSPR last night. RX antenna is a 70cm dia tuned loop at 2m above ground. SV8CS is a first for me. 2016-08-20 00:44 SV8CS 0.475655 -27 0 KM07js 0.1 G3WCB IO80ei 23
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-08/msg00121.html (14,575 bytes)


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