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Re: [TowerTalk] Hustler mobile resonators dipole

To: Tom Rauch <w8ji@contesting.com>,"Scott Fike" <kc0bus@hotmail.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Hustler mobile resonators dipole
From: Pete Smith <n4zr@contesting.com>
Date: Mon, 18 Oct 2004 07:59:44 -0400
List-post: <mailto:towertalk@contesting.com>
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.

From context, I infer that Tom is talking about base-feeding one mobile whip, as originally intended, and placing it over a good ground plane. Correct? In that case, wouldn't another, more efficient mobile antenna be a better choice? I used a Hustler mobile whip in a garden apartment back in the 70's, and while it worked, I never had really good feelings about the resonator, since it got warm with only 100 watts CW.

73, Pete N4ZR



At 07:39 AM 10/18/2004, Tom Rauch wrote:

>   Specifically, I have been thinking of using two 80 meter
> Hustler/Newtronics mobile resonators fastened back to back
in a dipole
> configuration. Only instead of putting them in the more
common horizontal
> configuration, I was wanting to orient them in the
vertical position.

Scott,

My suggestion would be you do something different.

You will have much poorer efficiency with a vertical dipole
of loaded elements compared to a similar height and coil
style antenna worked as a Marconi against a good ground
system.

 If you can, you might consider as large a ground system as
you can muster (as many straight radials as you can fit, or
a screen) and a Marconi antenna. You will have less ground
loss, less feedline radiation, wider bandwidth, and better
antenna efficiency if you keep the same overall height and
use the antenna as a Marconi. The only thing you have to do
that is more work is install a ground of some type.

A vertical dipole is workable, but decoupling the feedline
is a chore and the losses are pretty high with two mobile
antennas back-to-back.

73 Tom


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