[TowerTalk] Re: homebrewing short yagis

[Dan Evans]

Hi Again,

I guess I should have explained things a little better, third shift will do
that to your thought process after awhile:-)

The reason I'm going with a 6' boom with shortened elements on 6 meters is
this will be a "mobile" antenna.  It is pretty uncommon for me to turn the
beam while in motion, but I want to keep the turning radius and wind loading
within reason.  I'm looking for better performance than the omni loops, but
a full size yagi and even the moxons that I have built are a bit too bulky.
And I prefer to stick with horizontal polarization, I've used verticals
before but not with much success.

Also, I wouldn't begin to call myself an expert, but I have built lots of
antennas before.  Mostly yagis for 6 and 2 meters and wire antennas for HF.
But I've never built any "shortened" antennas, so I would like to learn
about that particular aspect of the Black Magic involved:-)

Thanks for the help,
Dan


Dan Evans N9RLA
Scottsburg, IN 47170
{EM78}
IN-Ham list administrator
QRP-l #1269
1/2 of the N9RLA /R no budget Rover Team
Check out the Rover Resource Page at:
http://www.qsl.net/n9rla

----- Original Message -----
From: "Dan Evans" <n9rla@yahoo.com>
To: "TowerTalk reflector" <towertalk@contesting.com>
Sent: Sunday, September 30, 2001 1:24 PM
Subject: homebrewing short yagis


> Hello All,
>
> I have an unusual antenna project in mind and could use some direction.
>
> I'm planning to build a "short yagi" for 6 meters.  I've gone through my
> limited collection of reference books, and haven't found much help.  I
have
> several editions of the Handbook, a fairly extensive QST collection, and a
> 94 edition of the ARRL Antenna Book.  I've been considering some of the
> Antenna compendium series, is there a particular issue that discusses
loaded
> yagis?  I'm sure they are all great, but can't afford to buy the whole
> series.
>
> What I have in mind is a two or three element 6 meter yagi on a 6' boom.
I
> want to keep the element lengths less than 6' overall.  At  6 meters, I
> think this should still produce a reasonably efficient antenna.  I realize
> that most people don't need to reduce the size of a 6 meter yagi, so I
don't
> expect to find "cook book" directions.
>
> And while I'm at it, what do you guys think about loading methods?  Anyone
> care to comment on loading coils versus linear loading?
>
> Thanks,
> Dan
>
>
> Dan Evans N9RLA
> Scottsburg, IN 47170
> {EM78}
> IN-Ham list administrator
> QRP-l #1269
> 1/2 of the N9RLA /R no budget Rover Team
> Check out the Rover Resource Page at:
> http://www.qsl.net/n9rla
>
>


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