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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Original\s+73kHz\s+first\.\s*$/: 5 ]

Total 5 documents matching your query.

1. LF: Original 73kHz first. (score: 1)
Author: Andy Talbot <[email protected]>
Date: Fri, 19 Feb 2016 22:40:11 +0000
Can anyone remember what the first claimed 73kHz QSO  was .  I seem to remember it was a few tens of metres across a car park, probably in 1996 (Strictly, that was a capacitor not radiation, but...)
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00294.html (9,293 bytes)

2. Re: LF: Original 73kHz first. (score: 1)
Author: "Graham" <[email protected]>
Date: Sat, 20 Feb 2016 01:43:15 +0100
First true free running single pass data TA decode on 73 K -43 , right on the lower limit, but 9% fade [data loss] very stable path 02:25 73 WG2XRS de DL-SWL Op65 -43 dB F:9% in nr Wolfsburg More loc
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00296.html (18,981 bytes)

3. Re: LF: Original 73kHz first. (score: 1)
Author: "F6CNI - Andy - JN19QB" <[email protected]>
Date: Sat, 20 Feb 2016 08:54:30 +0100
Hello Andy. Not about the first claimed 73kHz QSO, but just for info the first time I heard Peter G3LDO on 73.4 kHz normal CW ( 338 km ) was around november / december 1996. Later, I had my first xba
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00297.html (11,062 bytes)

4. Re: LF: Original 73kHz first. (score: 1)
Author: Lawrence Galea <[email protected]>
Date: Sat, 20 Feb 2016 15:44:47 +0100
Hello Andy, I think that G3YXM at wireless dot org dot uk might be able to help you as he has a lot of information on LF at http://www.wireless.org.uk/ Regards Lawrence
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00301.html (11,209 bytes)

5. Re: LF: Original 73kHz first. (score: 1)
Author: Andy Talbot <[email protected]>
Date: Sun, 21 Feb 2016 11:20:13 +0000
As a rule of thumb, the near / far field transition is taken to be lambda/ 2.pi   Where the reactive fields are down to below the level of the radiation . So for 137kHz that lies at 350m     and for
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00315.html (13,416 bytes)


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