[TowerTalk] antenna choices for K4XS

[ve4xt at mymts.net]

Also ridiculous is the notion someone must be on the honour roll to be knowledgeable about antennas. 

73, Kelly
ve4xt 

Sent from my iPad

> On Apr 12, 2015, at 2:36 PM, "Jeff AC0C" <keepwalking188 at ac0c.com> wrote:
> 
> Gear choices are a complete joke when talking about being active over a span of 50+ years - as a lot of the top honor role guys have been.
> 
> Sure, some gear is better than others (antenna X is 2 db better than antenna Y) and in a shoot-out, the better beam will give the better signal by a bit. But that's a pretty small delta compared to solar conditions.  I wonder what the SFI difference needs to be to provide an equivalent 2db better SNR to signals on the bands?  I bet it's not very much.
> 
> The fact is being on the bands when the condx are right - even if you don't have 20 elements at 200' - can get you in the log most of the time.  10m is a great example of that.  When the SFI is sizzling (e.g 90's peak), a whip on the balcony with the railing as the ground system let's you work the world.  For the high bands, when the cycle is down, all the antenna horsepower in the world won't burn a hole through to let you work the DX.
> 
> 73/jeff/ac0c
> www.ac0c.com
> alpha-charlie-zero-charlie
> 
> -----Original Message----- From: Joe Subich, W4TV
> Sent: Sunday, April 12, 2015 2:24 PM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] [Bulk] Re: antenna choices for K4XS
> 
>> On 2015-04-12 2:56 PM, David Blake via TowerTalk wrote:
>> and I on the other hand would suggest you look 1st for a used
>> Mosley. With only Mosley yagi's I am #1 Honor Roll (all 340 DXCCs)
>> and total DXCC confirmed 352. Looking at the ARRL Mixed DXCC list I
>> don't find  K7LXC at any level
> 
> K7LXC and N0AX published two widely respected *scientific* studies
> of tribander performance using validated measurement techniques to
> directly compare the performance of the tested antennas against a
> standard (dipole).  These were field tests not some modelling exercise
> that failes to capture real world losses in the antenna design.
> 
> In those tests, the Mosley antennas TA-33, PRO-57B and PRO-77 were
> the *worst* performers in their respective (small and large tribader)
> categories.  The TA33 averaged less than 1 dB gain compared to a dipole
> on 20 meters and less than 1.5 dB gain compared to a dipole on 10
> meters.  The PRO57B and PRO77 both averaged less than 1 dB gain
> compared to a dipole on 20 meters and more than 1 dB *LESS* gain
> compared to a dipole on 10 meters.
> 
> The small tribander group typically showed 3 dB on 20 meters and 4 dB
> on 10 meters vs. a dipole while the large tribander group typically
> showed 4+ dB on 20 meters and 5 - 6 dB on 10 meters.
> 
> Enjoy your Mosely ... I'm also on the DXCC Honor Roll (CW and Mixed)
> and my only antennas are a 20-10 meter dipole at 20 feet, an R5
> (vertical) with base at 20 feet, and a 160-40 meter trapped inverted V
> with apex at 40 feet.  As has been said many times - anything that
> radiates will make QSOs.
> 
> 73,
> 
>  ... Joe, W4TV
> 
> 
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