[TowerTalk] Mosley Antenna Question

[ve4xt at mymts.net]

The point many Mosley supporters don't seem to understand is that from the results of one antenna, you cannot derive any knowledge about whether it is outperforming another yagi of comparable cost or dimensions.

A person who puts up a TH7 and uses it exclusively for ten years can proclaim he was happy with the performance, but has no basis for proclaiming it would have outperformed, say, a Skyhawk, JK Tribander, X7 or even a Pro57.

Someone who took down a TA 33 and replaced it with an A4s and notices an improvement DOES have a basis for regretting buying the TA33, however.

An engineer and a tower expert who create a scientific plan for comparing antennas and execute that plan do have a basis for saying that one brand of antennas was inferior to competing, comparable models, as well.

The plural of anecdote is not data. Only by sound comparison can one say for certain that spending $1,500 with Mosley is better than spending $1,500 with DX Engineering or Hy-Gain or JK. 

73, Kelly
ve4xt 


Sent from my iPad

> On Feb 18, 2015, at 9:37 PM, "David Gallatin via TowerTalk" <towertalk at contesting.com> wrote:
> 
> Indeed everything works. That supposition does not rule out some things working far better then others with the proof being in the empirical evidence of experience by making contacts.  I don't need an antenna range or a model to tell me the Mosley tri-bander that's going up in the spring is going to be light years better then the MFJ loop tuner I have sitting on a chair in my spare bedroom. As for measuring performance... I have yet to hear an Asiatic station, much less work one. I expect that will change with the advent of my yagi going up and when the QSL cards start rolling in from JA that's all the measurement I need.  73,
> David, AA9G
> 
> ex W5DCG and KC9EEV
> 
> 
> 
>    On Wednesday, February 18, 2015 1:20 PM, "john at kk9a.com" <john at kk9a.com> wrote:
> 
> 
> N6BT wrote an article in the July 2000 issue of QST called "Everything Works"
> 
> You do not need an efficient antenna to work DX and without a way to
> compare it to other antennas you have no way to measure its performance.
> 
> John KK9A
> 
> 
> 
> To:    towertalk at contesting.com
> Subject:    Re: [TowerTalk] Mosley Antenna Question
> From:    Jim Brown <jim at audiosystemsgroup.com>
> Reply-to:    jim at audiosystemsgroup.com
> Date:    Wed, 18 Feb 2015 09:44:52 -0800
> 
> 
> On Tue,2/17/2015 3:06 PM, Joe Subich, W4TV wrote:
> K7LXC will not "talk his book" but I will say that multiple unbiased
> antenna range tests - including those reported in the K7LXC/N0AX
> "Tribander Test Reports" - have shown that the Mosley antennas perform
> more poorly than any other manufacturer's multiband yagis of similar
> boom lengths.
> 
> It's a bit of a stretch to call it a "book" -- it's a well-written,
> well-documented engineering report on the well-planned and well-executed
> antenna measurements that Steve and Ward did something like 12-15 years
> ago. This report, another on companion tests on HF verticals, and N6BT's
> "Array of Light" book are all available from Steve's Champion Radio
> website, and all are worth far more than what you pay for them.
> 
> The N6BT book is really about antenna design, discusses the designs of his
> Force 12 antennas, and includes designs for a nice variety of HF antennas.
> The only thing it lacks is an editor -- several chapters are redundant.
> One of the chapters debunks the inflated gain claims of antenna
> manufacturers, showing that the advertised gain numbers for their
> tri-banders were 3-6 dB greater than the maximum possible gain for a
> monoband Yagi of comparable size.
> 
> 73, Jim K9YC
> 
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