[Wswss] Comparison Table of 6m Antennas by VE7BQH

[Todd Evans]

I would like to very much thank Lionel for this grand effort, and Lance for distributing it.
Very good stuff,
Respectfully,
Todd and Pamela Evans w6tod and kc6uus Mojave Desert, California

--- On Fri, 6/26/09, Lance Collister, W7GJ <w7gj at q.com> wrote:

From: Lance Collister, W7GJ <w7gj at q.com>
Subject: Re: [Wswss] Comparison Table of 6m Antennas by VE7BQH
To: "Magic Band EME Group" <magic at 6meme.com>, "Amateur radio moonbounce" <Moon-net at list-serv.davidv.net>, "PNWVHFS" <PNWVHFS at googlegroups.com>, rmvhf at rmvhf.org, newsvhf at mailman.qth.net, "Western States Weak Signal Society" <wswss at mailman.qth.net>, "50mhzer's" <50mhz at qth.net>
Cc: "G0LCS, Kerry Rochester" <kerry.rochester at gmail.com>, "Peter G8BCG" <peter at g8bcg.org.uk>
Date: Friday, June 26, 2009, 9:07 AM

I now have the proper web page up in place with the link to the above table, plus 
links to a number of the antennas included in the table:

http://www.bigskyspaces.com/w7gj/6mTable.htm

VY 73, Lance


Lance Collister, W7GJ wrote:
> Howdy!
> 
> Over the last quarter century, antenna performance has improved dramatically.  Thanks 
> to the development of computer modeling software, antennas can now be designed to 
> provide excellent results.  Many older antennas are still in use around the world 
> that were built using less sophisticated techniques.  A number of 6m operators have 
> wondered if it is time to upgrade their antenna systems.
> 
> There is no question that each operator has different interests and constraints. 
> Some want to arrange various antennas to "fill in the nulls" in ground gain patterns 
> so they can be assured of not missing signals coming in at certain angles.  Others 
> want to increase maximum signal strengths while still fitting the antenna in their 
> garden.  And still others are interested in assembling an antenna system that will 
> have enough free space gain to enable them to complete EME contacts while the antenna 
> is elevated (without any ground gain).  With the differences in how antennas are 
> marketed and what specifications are published, it is no wonder that many hams have 
> expressed confusion when they try to compare antennas to determine what would be the 
> best choice for their particular situations.
> 
> Lionel Edwards, VE7BQH, is well known for his pioneering work in EME and his 
> knowledge of antenna design.  His comparison table of 2m antenna designs has been a 
> valuable resource for weak signal enthusiasts on that band.  Lionel now has 
> generously put together a table comparing a number of popular 6m antennas to help 
> guide Magic Band operators on antenna decisions.  This table was painstakingly 
> prepared to include the free space gain of each yagi with respect to a dipole, the 
> optimum and 75% of optimum stacking distances for both two and four yagis and 
> resulting gain figures, and the SWR of a single antenna 150 kHz from the design 
> frequency.  The SWR value provides an indicator of the "Q" of the antenna, and how 
> likely it is to be affected by rain, ice and snow; the narrower the bandwidth of the 
> antenna, the more susceptible it is to such detuning by the weather.
> 
>   http://www.bigskyspaces.com/w7gj/6mAntennaComparisonTableByVE7BQH.txt
> 
> Please join with me in thanking Lionel for graciously agreeing to undertake the very 
> laborious challenge of preparing such a table.  I will also post a link on my website 
> to the table for convenient future reference, along with links to more information on 
> many of the antennas listed in the table.
> 
> GL and DX! VY 73, Lance W7GJ
> 
> 
> 



-- 
Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX)
P.O. Box 73
Frenchtown, MT  59834  USA
QTH: DN27UB
TEL: (406) 626-5728
URL: http://www.bigskyspaces.com/w7gj
2m DXCC #11/6m DXCC #815


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