[TowerTalk] Hustler 5BTV - multi band trapped vertical antenna

Rob Martin rgmrob at yahoo.com
Mon Mar 10 19:00:22 EDT 2014


Thank you for the reply. 

I have done modelling of verticals over various radial systems on a single band with results very similar to those you presented in your paper.

What I would like to do is to model the Hustler 5BTV so the effect of radials cut for different bands and attached simultaneously can be seen across all five bands that the antenna is supposed to serve.

This is going to need a way to model the traps and loading hats. On looking around, it seems that others report difficulty in modelling the traps in an manner that gives results that line up with actual measurements.

Just so I'm clear, I would like to be able to simulate the multiband antenna (traps, hats and all) on all of the bands it claims to serve, and vary:
    the height of the feed point, 

    the radials  - vary how many and recognize that each radial will start at the feed point, have a length and a "route" from one end to the other. Some will be simple: a length, an azimuth and a "relationship" to the ground below (downtilt or straight out).  Some radials will not be straight and, by necessity, have to conform the available space. 

Again, many thanks for your help.


 From: Rob Martin <rgmrob at yahoo.com>
To: "jim at audiosystemsgroup.com" <jim at audiosystemsgroup.com> 
Sent: Monday, March 10, 2014 3:20 PM
Subject: Re: [TowerTalk] Hustler 5BTV - multi band trapped vertical antenna

Thank you. I'll read your pdf and reply later.


----- Original Message -----
From: Jim Brown <jim at audiosystemsgroup.com>
To: towertalk at contesting.com
Sent: Monday, March 10, 2014 2:07 PM
Subject: Re: [TowerTalk] Hustler 5BTV - multi band trapped vertical antenna

On 3/10/2014 1:49 PM, Rob Martin wrote:

> I would like to model the effect of mounting height and radial placement before installing this antenna.

As it happens, I have modeled extensively, and did this presentation at 
the Pacificon Antenna Forum last fall.


73, Jim K9YC

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