[TowerTalk] JK Navassa antenna

Jeff AC0C keepwalking188 at ac0c.com
Tue Jun 23 22:30:02 EDT 2015


If you need an endorsement, I believe this antenna was the choice of the 
2014 WRTC.  It was made originally by Cycle 24 but later the designer hooked 
up with JK to do the builds.

73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-----Original Message----- 
From: Rick Stealey
Sent: Tuesday, June 23, 2015 9:02 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] JK Navassa antenna

ve4xt  (A ham with obvious extraordinary expertise associated with all 
things electronic, with a call like that) writes:
"i would disagree: the dBi numbers seem in line with other trapless 2-el 
designs, such as the C3 or XR3."

Tom, N6BT in his book Array of Light, goes to great lengths to specify the 
parameters associated with gain specs.  Good stuff, well known.
But then he goes on to claim that his 2 element designs will beat any 
trapped tribander regardless of size!  Who knows?  But It doesn't appear as 
if Ken of JK Antennas has done anything to distort the gain figures right 
from the highly respected NEC4 model from which his antennas are built. 
What else could you ask for?  No wild claims, no marketing hype.  Isn't this 
what we've been demanding of antenna manufacturers for 50 years?

Rick  K2XT

By the way, sorry that I am unable to delete the text below.  Hotmail does 
not give me an option that I can find.

> From: ve4xt at mymts.net
> Date: Tue, 23 Jun 2015 17:41:49 -0500
> To: samsadventure at gmail.com
> CC: towertalk at contesting.com; mathenyr at marietta.edu
> Subject: Re: [TowerTalk] JK Navassa antenna
>
> i would disagree: the dBi numbers seem in line with other trapless 2-el 
> designs, such as the C3 or XR3.
>
> They’d be way high if they were quoted as dBd numbers, but take off the, 
> what, 2.4 dB, to get to dBd and 4 dB and change sounds reasonable. At 
> least, way more reasonable than, say, 8 dBd that some three-element 
> trapped tribanders pretend to have...
>
> 73, kelly
> ve4xt
>
>
> > On Jun 23, 2015, at 3:55 PM, <samsadventure at gmail.com> 
> > <samsadventure at gmail.com> wrote:
> >
> > no, but the claimed gain for 2 elements on each band seems high
> >
> >
> >
> >
> >
> >
> > Sam N5FO
> >
> >
> >
> >
> >
> >
> > From: Ralph Matheny K8RYU
> > Sent: ‎Monday‎, ‎June‎ ‎22‎, ‎2015 ‎12‎:‎29‎ ‎PM
> > To: towertalk at contesting.com
> >
> >
> >
> >
> >
> >
> >
> > Does anybody have any direct experience with this antenna?  I looked
> > at it at Dayton, as an item for our club to purchase, and I'm wondering
> > how it works out for real users.
> >
> > de K8RYU
> > _______________________________________________
> >
> >
> >
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> > TowerTalk at contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
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>
>
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