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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Coast\s+to\s+Coast\s+on\s+74kHz\s+ground\s+wave\s+\?\s*$/: 7 ]

Total 7 documents matching your query.

1. LF: Coast to Coast on 74kHz ground wave ? (score: 1)
Author: Laurence KL7 L <[email protected]>
Date: Thu, 2 Jan 2014 15:20:00 -0900
Hi Chaps - I saw the discussion on the modes and losses and wanted to add a bit - When looking at WWVB 60Khz (close to 74?) contours for daytime I notice more of a Vertical peanut shape in the fiedls
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-01/msg00124.html (12,204 bytes)

2. RE: LF: Coast to Coast on 74kHz ground wave ? (score: 1)
Author: Bob Raide <[email protected]>
Date: Thu, 2 Jan 2014 20:09:08 -0500
Laurence; It would be easy to determine coverage of radio signals of longer wavelengths using the soil map. However, the "soil map" is only an estimate and changes DRASTICALLY from season to season.
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-01/msg00390.html (15,262 bytes)

3. RE: LF: Coast to Coast on 74kHz ground wave ? (score: 1)
Author: Bob Raide <[email protected]>
Date: Thu, 2 Jan 2014 21:39:06 -0500
Jay; The only actual way to determine if it's field strength is of course to take field strength measurements. Frozen ground makes the biggest conductivity change. And to what depth of ground is froz
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-01/msg00391.html (19,318 bytes)

4. RE: LF: Coast to Coast on 74kHz ground wave ? (score: 1)
Author: Laurence KL7 L <[email protected]>
Date: Thu, 2 Jan 2014 17:34:27 -0900
Bob - Jay - thanks - Yes its the same here in the NDB world - it was always amusing to work with (or against mostly) a certain government agency who phoned me up time and time again, mostly in the Wi
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-01/msg00392.html (19,375 bytes)

5. RE: LF: Coast to Coast on 74kHz ground wave ? (score: 1)
Author: Bob Raide <[email protected]>
Date: Thu, 2 Jan 2014 23:50:34 -0500
Jay; No question about SNR being a factor. Very important you-know if anyone would. However, the Coast I would attempt to hit is not necessarily, in fact not likely California but Washington or maybe
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-01/msg00393.html (22,683 bytes)

6. Re: LF: Coast to Coast on 74kHz ground wave ? (score: 1)
Author: <[email protected]>
Date: Thu, 2 Jan 2014 21:16:07 -0500
Laurence, Bob I cherry picked the winter and summer SNR levels of WWVB at different US locations ... see http://www.w1vd.com/WWVB20wintersummer.jpg . The daytime path from Boulder to Cutler ME is abo
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-01/msg00555.html (18,137 bytes)

7. Re: LF: Coast to Coast on 74kHz ground wave ? (score: 1)
Author: <[email protected]>
Date: Thu, 2 Jan 2014 22:27:53 -0500
Bob Here are the 'signal only' plots for winter and summer ... http://www.w1vd.com/WWVBwintersummersig.jpg . Apparently not much difference at 60 kHz ... other than hours of daylight. SNR plots proba
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-01/msg00556.html (21,604 bytes)


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