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21. Re: LF: RE: MSF (6O kHz) and DCF77 (77.5 kHz) (score: 1)
Author: "John Rabson" <[email protected]>
Date: Wed, 22 Mar 2000 20:52:16 +0100
Thank you all for supplying the information I requested. May I explain what is going on? Last weekend the British Cave Research Association's Cave Radio and Electronics Group performed some tests in
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-03/msg00216.html (9,301 bytes)

22. Re: LF: RE: MSF (6O kHz) and DCF77 (77.5 kHz) (score: 1)
Author: "John Rabson" <[email protected]>
Date: Wed, 22 Mar 2000 21:04:57 +0100
That should be CREG Journal. Thank you all for supplying the information I requested. May I explain what is going on? Last weekend the British Cave Research Association's Cave Radio and Electronics G
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-03/msg00217.html (10,696 bytes)

23. LF: Re: French connection (score: 1)
Author: "John Rabson" <[email protected]>
Date: Thu, 6 Apr 2000 06:55:28 +0100
Have the French gone underground on LF. No, but the Cave Radio & Electronics Group do so regularly on LF. 73 de John Rabson G3PAI
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-04/msg00067.html (8,419 bytes)

24. LF: Re: Puckeridge Beacon (score: 1)
Author: "John Rabson" <[email protected]>
Date: Sat, 15 Apr 2000 08:30:15 +0100
Also S3 here on a 17 turn 80 cm loop designed for cave radio on 88 kHz and not retuned. Many thanks gentlemen for all your efforts. 73 de John Rabson G3PAI Hi All, for what it is worth I can copy a r
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-04/msg00191.html (9,130 bytes)

25. LF: Re: Earth contact resistance (score: 1)
Author: "John Rabson" <[email protected]>
Date: Wed, 3 May 2000 07:56:54 +0100
Hi all, I have noted again from Peter's description of the Tesla experiments at the Museum, and from John's Earth Wireless web site, that the addition of several pounds (or kgms) of common salt (and
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-05/msg00039.html (9,343 bytes)

26. LF: Re: Re: MORSE SUBSTITUTE (score: 1)
Author: "John Rabson" <[email protected]>
Date: Thu, 4 May 2000 21:53:53 +0100
My problem with Morse (I did use it once upon a time) is getting the words down onto paper these days. After 15 years of using word processors for everything, I've forgotton how to hand write fast e
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-05/msg00058.html (8,663 bytes)

27. LF: Re: OFFICIAL: FRENCH OM ON LF (score: 1)
Author: "John Rabson" <[email protected]>
Date: Tue, 16 May 2000 08:20:15 +0100
This seems to include St Pierre et Miquelon in region 2 (see http://www.art-telecom.fr/textes/index.htm)! 73 de John Rabson G3PAI -- Original Message -- From: [email protected] f1tay To: rsgb_lf_group
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-05/msg00215.html (10,746 bytes)

28. Re: LF: Re: OFFICIAL: FRENCH OM ON LF (score: 1)
Author: "John Rabson" <[email protected]>
Date: Tue, 16 May 2000 18:31:45 +0100
This reminds me of the day I got my licence. It was January and it had snowed the previous night. Excited by the new licence, I had several successful 160m CW QSOs before I found that the antenna was
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-05/msg00224.html (9,995 bytes)

29. LF: Re: Re: Morse tones / filters etc. (score: 1)
Author: "John Rabson" <[email protected]>
Date: Mon, 22 May 2000 18:45:26 +0100
Has anyone experimented with phase shifted / delayed audio, i.e. with "raw" audio fed to one half of the headphones and a (variably) phase-shifted / delayed version fed to the other half? This remin
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-05/msg00342.html (10,310 bytes)

30. LF: LORAN sidebands (score: 1)
Author: "John Rabson" <[email protected]>
Date: Thu, 25 May 2000 04:18:50 +0100
Can anyone provide a formula or graph showing the relative strength of sidebands down to 80 kHz, please? 73 de John Rabson G3PAI
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-05/msg00364.html (7,621 bytes)

31. LF: Re: Big & Small antennas - Reply to comments (score: 1)
Author: "John Rabson" <[email protected]>
Date: Sat, 3 Jun 2000 19:24:44 +0100
Possible Causes: My money is on the increased field strengths being due to fields and currents under the ground surface, resulting in greater effective height of the antenna. Obviously, this needs m
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-06/msg00048.html (8,955 bytes)

32. LF: Fw: Radiostation Grimeton (score: 1)
Author: "John Rabson" <[email protected]>
Date: Sun, 25 Jun 2000 18:23:48 +0100
The radio station Grimeton celebrates 75year anniversary on July 2nd, 2000. -- Original Message -- From: [email protected] Dick Rollema To: [email protected] LF-Group Sent: Wednesday,
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-06/msg00214.html (12,929 bytes)

33. LF: Fw: Slow-Audio (was Re: DX Cluster spots for 10/17Dec at GB7DXM) (score: 1)
Author: "John Rabson" <[email protected]>
Date: Tue, 19 Dec 2000 09:46:12 +0100
We only got down to half bandwidth, but... You might find this paper interesting: Rabson, John and Hugo (1996) 'Some Experiments in Speech Bandwidth Reduction ', CREG Journal 24, pp3,6. If you have d
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00236.html (10,842 bytes)

34. LF: Slow-Audio (was Re: DX Cluster spots for 10/17Dec at GB7DXM) (score: 1)
Author: "John Rabson" <[email protected]>
Date: Mon, 18 Dec 2000 23:09:39 +0100
You might find this paper interesting: Rabson, John and Hugo (1996) 'Some Experiments in Speech Bandwidth Reduction ', CREG Journal 24, pp3,6. If you have difficulty getting hold of the article pleas
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00242.html (10,554 bytes)

35. LF: Re: Pot cores available (score: 1)
Author: "John Rabson" <[email protected]>
Date: Mon, 11 Dec 2000 05:39:19 +0100
Paul, Please pardon me for intruding here with an offer to sell but it seemed to me that these items may be useful to some on here. I am sorry if I have violated the rules of forum here and wish that
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00359.html (8,507 bytes)

36. LF: Re: Re: Re: 73 khz permits (score: 1)
Author: "John Rabson" <[email protected]>
Date: Mon, 11 Dec 2000 05:37:17 +0100
You also surely must have heard of Government LEAKS rsgb LEAKS GAS LEAKS WATER LEAKS and Welsh Leeks Remember Sir Humphrey in 'Yes, Prime Minister': The Irregular Verb 'To Leak' I give unattributable
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00360.html (9,135 bytes)

37. Re: LF: CW etc (score: 1)
Author: "John Rabson" <[email protected]>
Date: Wed, 31 Jan 2001 19:35:35 +0100
ICW orginally was CW interrupted at AF with an interrupter wheel. See p. 129 of 'Radio Engineering' ed. Roy C Norris, pub. Odhams Press Hello all, Look for example "MIL-STD-188-140A" Appendix A .....
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00005.html (11,683 bytes)

38. LF: Re: RE: Re: Re: Earthing - correction (score: 1)
Author: "John Rabson" <[email protected]>
Date: Tue, 30 Jan 2001 20:17:55 +0100
You don't necessarily need one long earth rod. You can try the same total length made up of several short rods separated from one another by at least twice their length. 73 de John Rabson G3PAI Still
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00050.html (10,915 bytes)

39. LF: Re: Re: Earthing - correction (score: 1)
Author: "John Rabson" <[email protected]>
Date: Mon, 29 Jan 2001 22:51:34 +0100
I should have said 'spaced by 2 or more metres' In cave radio experiments we find that one x metre rod can be replaced by x one metre rods spaced by 2x or more metres.
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00070.html (10,523 bytes)

40. LF: Re: Re: Re: CW allocations... (score: 1)
Author: "John Rabson" <[email protected]>
Date: Mon, 29 Jan 2001 18:24:32 +0100
To All from PA0SE I thought CW means Continuous Wave. Am I wrong? No, the term 'Continuous Wave' was to distinguish it from spark! 73 de John Rabson G3PAI
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00076.html (9,103 bytes)


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