CHEAP AND EASY
2 METER ANTENNAS
Interested in ultra low cost 2 meter antennas that are easy
to build using cheap parts; that require no tedious matching and
adjusting; that are almost invisible; that are portable, compact, quickly
assembled; and that can be converted into a beam?
If so read
These antennas are somewhat based on the "V" designs in other
projects on this site.
They include the Ultra-simple wire version in
The Table Top version in figure 2
The 2 element beam version in figure
Fig. 1 Ultra-simple
"wire" version above made on an SO-239 connector.
Designed for hanging
from any handy support and can be hung from trees, used inside motel rooms
or as a "stealth"
Fig 2. Table top
"wire" version above using a dowel or other simple base.
lower elements must be self supporting. Use aluminum or copper
Disregard the reference to the upper insulator in figure
3. Yagi or Beam version
This is a variation of the designs
By adding the extra reflector element about 16 inches behind the
driven element and increasing it's length to 20 inches each side (5%),
some gain can be realized! According to the article, this version had not
been tested but should work with a bit of experimentation. It's no more
than a standard dipole with a reflector added to come up with a 2 element
yagi with all elements bent forward at a 90 degree
CONSTRUCTION NOTES AND
In all of these designs, please note that
the center conductor from the coax connection is connected to the element
in the "down position". According to the article from which these designs
were taken, this helps in adjusting swr!
Simply change the
angle and or trim each half a very small amount for best swr. Remember on
these antennas that the driven elements have to be insulated from each
other and also their support.
The beam version can be made in a "T"
shape with an insulated boom between the driven element and reflector and
the "T" portion for the support mast. Small diameter PVC would be a good
You will have to use your ingenuity for the mounting of the
elements to the support so the antenna will maintain the approximately 90
degree configuration. Experiment.
An alternate version of each
antenna can be built with all elements either vertical or horizontal
instead of in the form of a sideways “V”.
These designs can be used
from HF up thru 440 or above with a little experimentation.
out that old formula you should have learned for a starting point for the
lengths......468/freq = half wave dipole (driven element) and add 5
percent to the length for the reflector.
The spacing should be a little
less than .25 wave lengths from driven to reflector.
(According to the
article, using a director and driven element arrangement would cause
problems with a poor match and the spacing would be a lot
Using an MFJ 259b or equal would help with tuning the antenna
for your particular choice of frequency, but if you're not that lucky,
then just use the old swr meter and very low power while testing. As
always, start with longer elements and trim down. It is very difficult to
DON'T FORGET TO ID WITH YOU KNOW WHAT
These plans have been edited for length and came from a copy
that originated from the America Radio Club, Hialeah, Florida about 13
years ago. The club is believed to be no longer in operation.
author or call sign was listed. We do not take credit for this article or
the design, only for the "art work".
73 DON N4UJW