[Antennas] Vertical

Sun Nov 27 11:12:54 EST 2005

This is all true... but I don't know more than a hand full of people that 
can either elevate the radial system tall enough so that the residence don't 
get decapitated, or have the land to waste as an "off limits" zone to really 
make an elevated radial system practical. It is a good (better)system if 
you have the facilities to make it practical.
The definitive work on the subject of radials was actually done in the 
1930's by George Brown while he was at the University of Wisconsin at 
Madison. His publications (oddly, his only contribution to antenna theory) 
give a complete understanding of radial systems. Articles by Cebik (QEX, 
May/ June 1998) and Brown (QST, July 2000) simply copy his work. This is 
the work by which the broadcast station standard was developed.
Sincerely,
Dr. William J. Schmidt, II K9HZ
Trustee of the North American QRO - Central Division Club - K9ZC
Email: bill at wjschmidt.com
WebPage: www.wjschmidt.com
"It's not what you take with you... but what you leave behind that counts. 
Live each day as if it were your last."
----- Original Message ----- 
From: "Chris Boone" <CBoone at earthlink.net>
To: <antennas at mailman.qth.net>
Sent: Saturday, November 26, 2005 11:33 PM
Subject: RE: [Antennas] Vertical
> Actually, Bill, AM BC stations are only required under Part 73 to have 120
> radials...but some do run less under waiver and some run NONE (those 
> running
> a Franklin) There is a point of diminishing return after 120....
>> Cebik shows on his web site that 4-elevated radials 10ft or so high will 
> out
> do a larger number of buried or on the ground radials..I ran a vertical 
> with
> only 4 60ft long radials off the peak of the roof (vertical was mounted on
> the vent pipe)..worked like a champ on 80-10 with perfect B/W and SWR
> readings...and it got out too!
>> BTW I know of one radio station that used salt and even a sprinkler system
> to help its ground system....but had to replace the copper every few years
> due to the corrosion (OUCH! :)
>>> Chris
> WB5ITT
> Member SBE (Society of Broadcast Engineers)
>>> -----Original Message-----
>> From: antennas-bounces at mailman.qth.net
>> [mailto:antennas-bounces at mailman.qth.net] On Behalf Of Dr.
>> William J. Schmidt, II
>> Sent: Saturday, November 26, 2005 11:22 PM
>> To: antennas at mailman.qth.net
>> Subject: Re: [Antennas] Vertical
>>>> Yeah leave the "salt" for your thanksgiving dinner and use a
>> real engineering solution here... That is unfounded
>> witchcraft. Elevated radials are great if you have the space
>> for them (read that: get them far enough off the ground that
>> you won't trip over them/ behead yourself/ they don't get
>> caught in the mower/ etc.)... Of course 200+ buried radials
>> works too (hundreds of AM stations can't be wrong!).
>> ______________________________________________________________
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