[HCARC] Vertical Antenna Data

[W4wj at aol.com]

Gary...
 
Reference the AC4CA antenna...  the wires could certainly  be replaced with 
those aluminum tubes.
 
With spacing between the elements of course.  You would  "trim" the antenna 
by cutting the tubing to resonance.
 
A bit of work, but it could be done!
 
73
Don
W4WJ
 
In a message dated 11/11/2012 6:26:44 P.M. Central Standard Time,  
qltfnish at omniglobal.net writes:

I have the ON4UN book and have read it more than once, but I  guess I need 
to go back and re-read the parts on antenna arrays.  There  is always so 
much to learn and an idle mind is the devils  ........
 
What got me to thinking about vertical antennas being close  to each other 
and sharing part or all of an arrays of wire on the ground was  the talk at 
last meeting about the wire antenna "array" and its  counterpoise.  Not 
having numerous towers or tall trees to string  wire from to hold the upper part 
of a wire antenna, I was just wondering if  more than one vertical could 
act like that antenna set up.  I can get  interlocking aluminum 4 foot ( 1 3/4 
inch diameter) mast sections off of  Ebay for about $53 for a dozen 
sections.  A couple of loads of these  sections should build a number of antennas 
in the 30/20/15/10 meter  range.  Again, I am not sure what the larger 
diameter does exactly and  whether these could actually be used, but it would be 
fun to see.  The  antennas could even be raised higher off of the ground 
using the same kind of  pole sections that are made from fiberglass. Then a 
raised counterpoise might  be able to be used too.
 
Gary J/

 
 
73
Doin

N5BAA
HCARC Secretary (2013)

----- Original Message ----- 
From:  _W4wj at aol.com_ (mailto:W4wj at aol.com)   
To: _kerryk5ks at hughes.net_ (mailto:kerryk5ks at hughes.net)  ; 
_qltfnish at omniglobal.net_ (mailto:qltfnish at omniglobal.net)  
Cc: _HCARC at mailman.qth.net_ (mailto:HCARC at mailman.qth.net)  
Sent: Sunday, November 11, 2012 5:42  PM
Subject: Re: [HCARC] Vertical Antenna  Data


Gary...
 
In the ON4UN Low-Band Dxing Book, available from the ARRL,  there is a very 
complete
chapter on Vertical Arrays.  Good reading, with  examples of different 
types of antennas in this
category.
 
 
73
Don
W4WJ
 
 
In a message dated 11/11/2012 5:00:55 P.M. Central Standard Time, 
_kerryk5ks at hughes.net_ (mailto:kerryk5ks at hughes.net)  writes:

Gary,

I've been able to get antenna data on AM broadcast  stations from the FCC 
web site.  The last time I visited, it was _http://www.fcc.gov_ 
(http://www.fcc.gov/)  and once I got there i  went to the "audio Division" and there was 
a place for AM query.  The  site did provide antenna patterns for the AM 
stations and provided data on  the feed scheme used to generate those patterns.

One place I've  found info on VLF through MF ground systems is "Antenna 
Engineering  Handbook" edited by Jasik, Henry, 1961.  Chapter 19 shows a couple 
of  the VLF ground systems including an AF VLF antenna at Marion, Mass 
built  by RCA Communications.  Chapter 20 has a typical ground system for a  two 
element directional antenna.  

The FCC site is easy to  find, the old Jasik book is a challenge.  I'm sure 
there are  others.

Kerry
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