LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #24   Report Post  
Old May 4th 13, 01:32 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 409
Default Anyone know where I can find plans for an artificial ground?



"Szczepan Bialek" wrote in message
...


"Wayne" napisal w wiadomosci
...


"Szczepan Bialek" wrote in message
.. .



So with direct coax connection, one leg radiates and the other leg is
ground?


# Yes.

Would you be willing to touch the end of the "ground"/"radial" wire while
transmitting?


# The electron density changes periodically in the both legs (while
# transmitting).
# Are the voltages equal in the both legs?

But the question was: if the half of the antenna connected to the coax is
ground, would you be willing to touch the end of that half while RF power
is supplied to the center conductor connected half of the antenna?

That would be a good way of verifying your theory.


# It is not my theory. Somebody wrote:
# "H. Horizontal, unbalanced antennas, such as a long wire or random wire,
# need an RF Ground wire that should be 10-15% longer than the antenna wire
# itself. This is often called a counterpoise. The RF ground wire in this
case
# can be laid out in many ways, just so long as it does not cross over
itself
# to form a loop. Indoors, such wires are often run under carpets or along
# walls, out of windows, or anywhere else convenient. This wire will often
# have large RF voltages on it, so it should be kept away from people or
# insulated to prevent contact." From:
# http://www.sgcworld.com/radialstechnote.html

# Your "dipoles" are "horizontal, unbalanced antennas". The radial or
# counterpoise "should be kept away from people or insulated to prevent
# contact."

It appears that your reference above from SGC contradicts your single radial
assertion.

For a half wave antenna broken in the center, you claim that the half
connected to the coax braid is a radial.
If it is a radial, why does it have high voltage at the end, behaving like a
dipole?

 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Anyone know where I can find plans for an artificial ground? W5DXP Antenna 1 April 18th 13 11:06 PM
FA: MFJ-931 1.8-30 MHz HF Artificial Ground Larry Wilson Swap 5 January 7th 06 02:26 AM
FS: New MFJ - 931 Artificial Ground K8drn Swap 0 April 19th 04 06:24 AM
FS: MFJ artificial ground K8drn Swap 0 April 3rd 04 09:12 AM
artificial ground Joseph Fenn Antenna 2 March 29th 04 01:23 AM


All times are GMT +1. The time now is 10:33 AM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright Š2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017