[TowerTalk] MACAntenna

[Arthur Trampler]

duh me...

--- On Wed, 5/20/09, Dubovsky, George <George.Dubovsky at andrew.com> wrote:

From: Dubovsky, George <George.Dubovsky at andrew.com>
Subject: RE: [TowerTalk] MACAntenna
To: "Arthur Trampler" <atrampler at att.net>, "Pete Smith" <n4zr at contesting.com>, towertalk at contesting.com, "Brian Gieryk" <ke6iyc at mac.com>
Date: Wednesday, May 20, 2009, 8:47 AM

Probably a typo in your email, Art, but I presume you meant feet, not inches
;-)

73,

geo - n4ua

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Arthur Trampler
Sent: Wednesday, May 20, 2009 9:43 AM
To: Pete Smith; towertalk at contesting.com; Brian Gieryk
Subject: Re: [TowerTalk] MACAntenna

That's easy Brian.
 
If the boom to mast is at the center of the boom, then one has 10.25" on
that side of the right triangle; 17.333 inches on the other side of the right
triange; and 20.13" turning radius.
 
Art

--- On Wed, 5/20/09, Brian Gieryk <ke6iyc at mac.com> wrote:

From: Brian Gieryk <ke6iyc at mac.com>
Subject: Re: [TowerTalk] MACAntenna
To: "Pete Smith" <n4zr at contesting.com>,
towertalk at contesting.com
Date: Wednesday, May 20, 2009, 8:11 AM

Perhaps a typo on their site, or an oversight, but how cane one have a  
turning radius (20 ft, 1 in.) LESS than the boom length (20 ft, 6 in.)?

Brian
KE6IYC

On May 20, 2009, at 4:41 AM, Pete Smith wrote:

> This year at Dayton, there was a vendor (www.mactenna.net)
> demonstrating something called the SB20-10 Simple Beam.  The basic
> principle was described in a QST article in September 2008, applied
> to a wire dipole, and I remember at the time thinking "You've
gotta
> be kidding."  Now, however, the inventor has incorporated the idea
in
> a 3-element yagi, and unless he has cooked the books, the EZNEC
> models look pretty good.  On all 5 bands between 20 and 10 meters,
> the models show very similar pattern and gain numbers and excellent
> SWR bandwidth, all without motors, moving parts (other than relay
> contacts), and at a decently low price.
>
> The manufacturer's web site is very forthcoming with information,
> which tends to inspire confidence.  Still, I'd appreciate  hearing
> what the gurus among us think.
>
> 73, Pete N4ZR
> New Articles Daily - the Contesting Compendium at
http://wiki.contesting.com
> The World Contest Station Database, updated daily at
www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net
>
>
> _______________________________________________
>
>
>
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