-=> On 09-27-97  14:19, Roy Witt said to Ivy Iverson,<=-
-=>"About High Gain Antennas for 2M...,"<=-
-=> 25 Sep 97 00:55, Ivy Iverson wrote to Roy Witt:
 
 RW> Hello Ivy.
 
Hi, Roy;
 
 RW>> I built one a few years ago and it worked well.  The antenna
 RW>> itself is constructed using RG8 coax, cutting to 1/4 wave lengths
 RW>> and soldering them all  together in a vertical mode.  I put mine
 RW>> into a piece of PVC pipe and used it  for a while on my backup
 RW>> repeater that I keep in the garage.
 
 II> Do you have construction details for this one?  Would it be possible
 II> to get a copy from you?
 RW> You  guys are just bound and determined that I go home and look
 RW> through my  garage file cabinet...:)  Those plans are there somewhere,
 RW> along with the Quagi plans...
 
Yup.  (Pretty please?)   }:->
 
Seriously, wouldn't it be something like this, using electrical 1/4 wave
pieces of coax, (such as RG-8)?
 
        _______ _________ _________ _________ _________ _________
        -------/ /-------/ /-------/ /-------/ /-------/ /-------
        ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~
 
(I could do a better drawing with high-ASCII).
 
In other words, every electrical 1/4 wave, connect the center conductor
of the previous section to the shield of the next section and visa-versa?
 
 II>   It sounds like a good toy for field day or communication emergency
 II> situations.  (Got a weather baloon and a tank of helium?)   :-}
 RW> These are much more than field day or emergency antennas, their the
 RW> same basic  antenna you'll find on every mountain top,
 
Understood, but there aren't too many gain antennas that you can roll up
for storage.  And if you can hang it from a sufficently large balloon, you
would have one heck of a high antenna... how high is only limited only by
the length and strength of your coax.  Though if the wind is blowing,
you would probably have to anchor the balloon with guy lines.  The antenna
could serve as one of the guys, or could hang down under the balloon.
This is what UI had in mind with my previous statement... GREAT for field
day, emergencies or other temporary use.
 
 RW> whoops, sorry you don't have  mountains in Wisconsin, hilltop or
 RW> whatever repeater site.
 
Heh heh... Nothing that most people would call mountains, though there are
some darned high hills, like the one between here and Fon Du Lac, which
is only about 30-40 miles away, but it's rare to hit their repeater.
There is one Ham there that uses a beam and 25-50 Watts to hit our
county's main 2M repeater, and that's less than 20 miles from him.  Yet
I can reliably hit the big Milwaukee repeater, (nearest RX site about 40
miles from me), with only 5 watts and my 6dB J-pole.  (I have hit it
using a little twinlead J-pole when the band is open).  Nope, no
mountains, but plenty of hills.
 
 RW> Those white sticks you see at the Ham store are built the same way.
 RW> Take the  Hustler G6-440 I replaced it with.  Same antenna inside a
 RW> fiberglass tube. 
 
I'm not sure exactly what their internal construction is, but I'm sure
they are pretty standard, with 1/4 or 5/8 wave sections, properly phased,
no matter who made it.
 
73 DE KB9QPM
   Ivy
 
 
 
... Become hot stuff... learn to solder!   ;->
 
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          |---------------> Ivy Iverson, KB9QPM <--------------|
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