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Total 47 documents matching your query.

41. Re: [TowerTalk] New N6LF Ground Probe Designs (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Sat, 2 Mar 2024 15:07:01 -0800
Thanks for the reference, Paul. I located it here: https://nvlpubs.nist.gov/nistpubs/Legacy/TN/nbstechnicalnote139.pdf Brian _______________________________________________ _________________________
/archives//html/Towertalk/2024-03/msg00011.html (8,649 bytes)

42. Re: [TowerTalk] New N6LF Ground Probe Designs (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Sun, 3 Mar 2024 11:53:37 -0800
Good guess, Jim. N6LF just sent me an old IRE article from 1954 that explains the derivation of the map. It's intended to predict propagation for AM broadcast signals over broad areas, not accurately
/archives//html/Towertalk/2024-03/msg00014.html (8,943 bytes)

43. Re: [TowerTalk] New N6LF Ground Probe Designs (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Sun, 3 Mar 2024 16:43:48 -0800
https://www.antennasbyn6lf.com/ The reference I gave to his original soil parameter article was actually to a preliminary version. Here's the final article: https://rudys.typepad.com/files/qex-nov-de
/archives//html/Towertalk/2024-03/msg00016.html (8,943 bytes)

44. [TowerTalk] HF Ground Parameters (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Thu, 28 Mar 2024 13:10:59 -0700
Ground permittivity and conductivity are needed to model an antenna over ground. Accurate values are particularly important for vertical antennas and for horizontal antennas with low conductors. You
/archives//html/Towertalk/2024-03/msg00111.html (8,575 bytes)

45. Re: [TowerTalk] HF Ground Parameters (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Thu, 28 Mar 2024 17:06:56 -0700
"Brian, can you comment on how your table values relate to the frequency adjusted ground characteristics shown by EZNEC?" Dan, I've never used EZNEC and know nothing about it. The ground parameters a
/archives//html/Towertalk/2024-03/msg00114.html (7,277 bytes)

46. [TowerTalk] Revised HF Ground Parameters (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Tue, 9 Apr 2024 11:15:39 -0700
I've updated my writeup on HF ground parameters. I revised the extrapolation of 1 MHz FCC data to the HF ham bands. I also added data for seawater and freshwater, both of which vary considerably with
/archives//html/Towertalk/2024-04/msg00005.html (7,481 bytes)

47. [TowerTalk] Ground Constants (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Wed, 29 May 2024 12:28:05 -0700
To better represent specific terrain, my HF Ground Constants page now includes an interpolator for the Hagn generic curves. The Hagn HF values are more realistic than the ARRL ground constants offere
/archives//html/Towertalk/2024-05/msg00109.html (8,082 bytes)

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