|To:||"Tom Rauch" <firstname.lastname@example.org>,"Scott Fike" <email@example.com>, <firstname.lastname@example.org>,"Pete Smith" <email@example.com>|
|Subject:||Re: [TowerTalk] Hustler mobile resonators dipole|
|From:||"Carl Smidt" <firstname.lastname@example.org>|
|Date:||Mon, 18 Oct 2004 09:52:53 -0300|
Tom just lets his knowledge and long time experience shine through.|
The Marconi 1/4 wave vertical, operating in conjunction with a ground system, was a classic in days of old. It was one of the first antenna designs that one learned about in early radio engineering classes.
I have taken the liberty to copy below what 'Google' has to say:
"The simplest vertical is the Marconi which is a quarter-wave radiator above a ground-plane. It has a feedpoint impedance over a perfect ground of 36 ohm. Above real ground it is usually between 50 and 75 ohm. This makes a good match for 50 ohm cable with the shield going to ground. For a given wavelength it is the smallest antenna with reasonable efficiency and so is a popular choice for mobile communication. It can be thought of as half of a dipole with the other half appearing as a virtual image in the ground".
73, Carl VE9OV
----- Original Message ----- From: "Pete Smith" <email@example.com>
To: "Tom Rauch" <firstname.lastname@example.org>; "Scott Fike" <email@example.com>; <firstname.lastname@example.org>
Sent: Monday, October 18, 2004 8:59 AM
Subject: Re: [TowerTalk] Hustler mobile resonators dipole
Pretty funny -- I wasn't sure what Tom meant by a "Marconi", so I went to the ARRL Antenna Book to look it up, and the only reference in the index was to the guy who did those early experiments -- *that* Marconi. ON4UN's book had no index reference to Marconi at all.
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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