Re: [TowerTalk] Hustler mobile resonators dipole

["Alan C. Zack" <k7acz@cox.net>]

If it comes to a vertical arrangement I'd suggest a screwdriver type 
so you could remotely tune it to different bands.  That way you could 
maybe get it higher without having to worry about how to reach it to 
switch resonators, etc.  I think one of the screwdriver antenna makers 
offers a base installation option for this purpose.
GL!

Pete Smith wrote:

> 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

__________________________________________________________________________ 

Alan Zack
Amateur Radio Station K7ACZ
Las Vegas, Nevada, USA
Quality Engineer, The Boeing Company, Retired
Aviation Chief Warrant Officer, U.S. Coast Guard, Retired
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