Search String: Display: Description: Sort:

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+Modeling\s+\"Ground\"\s+and\s+losses\s*$/: 34 ]

Total 34 documents matching your query.

21. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Fri, 27 Feb 2015 14:26:37 -0500
Having lived in the Newburgh area, I have to object again to this report that I have tried to debunk before. I have earlier communicated this objection to Mr. Fry which he chooses to ignore. Given th
/archives//html/Topband/2015-02/msg00736.html (14,557 bytes)

22. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Richard Fry" <rfry@adams.net>
Date: Fri, 27 Feb 2015 14:33:48 -0600
... Simply put, the Newburgh area is at least a difficult area and at worst an entirely inappropriate area to test this thesis. ... Some may not be aware of the methodology used to determine the FCC
/archives//html/Topband/2015-02/msg00739.html (10,942 bytes)

23. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Fri, 27 Feb 2015 20:41:34 -0800
I agree with Tom's analysis -- a good radial system SHIELDS the field from the earth, returning the field and the IN PLACE OF the lossy earth. Studying N6LF's excellent work lit up the light bulb for
/archives//html/Topband/2015-02/msg00758.html (10,619 bytes)

24. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sat, 28 Feb 2015 01:06:31 -0500
Jim, This brings up something I have been wondering about. You make several good points that I agree with. However, on one hand we have a very lossy earth (for instance sand) which would mean less co
/archives//html/Topband/2015-02/msg00759.html (11,234 bytes)

25. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Richard Fry" <rfry@adams.net>
Date: Sat, 28 Feb 2015 07:33:58 -0600
Comments to two earlier posts by separate posters (clips below): But if indeed a less lossy ground means that fewer radials are needed to be placed in the field, then the coupling to the less lossy g
/archives//html/Topband/2015-02/msg00763.html (18,404 bytes)

26. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Sat, 28 Feb 2015 19:14:07 -0500
The source of the r-f current flowing on buried radials is the r-f current flowing in the earth as a result of radiation from the vertical monopole. Current is not "lost" to the earth from the buried
/archives//html/Topband/2015-02/msg00777.html (9,297 bytes)

27. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sat, 28 Feb 2015 21:23:50 -0500
Richard, You have just upset the apple cart for me. For the sake of argument, assume a monopole with a single radial in free space. I would assume that this would be a somewhat efficient antenna with
/archives//html/Topband/2015-02/msg00780.html (17,718 bytes)

28. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Richard Fry" <rfry@adams.net>
Date: Sun, 1 Mar 2015 08:48:09 -0600
Reply to W8JI post of Sat, 28 Feb 2015 19:14:07 -0500: The source of the r-f current flowing on buried radials is the r-f current flowing in the earth as a result of radiation from the vertical monop
/archives//html/Topband/2015-03/msg00007.html (11,044 bytes)

29. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Sun, 1 Mar 2015 10:39:53 -0500
The source of the r-f current flowing on buried radials is the r-f current flowing in the earth as a result of radiation from the vertical monopole. (etc) It seems to me that answer ignores other eff
/archives//html/Topband/2015-03/msg00009.html (10,087 bytes)

30. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Richard Fry" <rfry@adams.net>
Date: Sun, 1 Mar 2015 12:08:58 -0600
The feedpoint connection, in all cases of vertical antennas, whether the system is shunt fed or series fed, or even if it is an end-fed half wave, ties one feed terminal to the ground or counterpoise
/archives//html/Topband/2015-03/msg00018.html (8,954 bytes)

31. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Sun, 1 Mar 2015 18:16:56 -0500
If the total energy flowing into the monopole system with buried radials is dictated only by its hard-wired connection through the transmission line back to the transmitter, then what is accounting f
/archives//html/Topband/2015-03/msg00028.html (9,440 bytes)

32. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Bill Aycock" <baycock@mediacombb.net>
Date: Sun, 1 Mar 2015 20:37:53 -0600
Richard-- Is it conventional to compare the surface wave fields at a distance so near the Radial length and the wave length? 0.1 km Sounds like a lot, but it is only 100m, which is low, in Lambda ter
/archives//html/Topband/2015-03/msg00033.html (9,621 bytes)

33. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "Richard Fry" <rfry@adams.net>
Date: Mon, 2 Mar 2015 05:35:41 -0600
Is it conventional to compare the surface wave fields at a distance so near the Radial length and the wave length? I chose a horizontal plane distance that would be just a bit into the far field radi
/archives//html/Topband/2015-03/msg00035.html (8,117 bytes)

34. Topband: Modeling "Ground" and losses (score: 1)
Author: Bill N6MW <billsstuffn6mw@comcast.net>
Date: Wed, 04 Mar 2015 22:35:42 -0800
As is touched on in a note found on the www with more detail than useful here ( http://n6mw.ehpes.com/AntennaGroundLoss3.pdf ) let me make a couple of points on ground losses without directly address
/archives//html/Topband/2015-03/msg00040.html (13,227 bytes)


This search system is powered by Namazu