Measurements
length a to e= 460 into frequency
(example 460 divided by 3.922=117.28 ft)
length b to d= 320 into frequency (example 320 divided by 3.922=81.59 ft)
feed line 57/ 87/ or 103 feet for optimum performance
Materials needed
rg8x (high power),rg58, or rg59
hot glue and hot glue gun
solder and soldering iron
pl 259 connector with proper adapter
empty small plastic container
with lid
small nylon rope
plastic insulators if you want
to get fancy
Getting started
#1. Measure length of dipole section
and cut 117 feet 4 inches
#2. Find center exactly mark with
electrical tape (point c see diagram)
#3. Determine length of point b
to d and divide in half 81.59 / 2= 40 feet 9 inches
#4. Start at c and measure 40'9"
and mark with tape both ways
these will be your B and D measurements
#5. Cut length of feed line 57, 87, or 103 feet.
Antenna Surgery
#01. Take an empty frosting container
and remove lid
#02. Cut main container up one
inch from bottom
#03. Drill 3 holes in side to accept
rg8x coax at proper entry points
#04. Feed dipole section in one
hole and out the other and leave point c inside
#05. Feed line should enter through
remaining hole
#06. Remove 1 inch of vinyl at
point C
#07. Carefully separate braid into
two pieces do not disturb center connector
#08. Remove vinyl at end of feed line and prepare center and braid
#09. Solder center connector of feed line to one side of braid at C
#10. Solder braid of feed line to
other side of braid at C
#11. Position connection inside
frosting cup and completely fill with hot glue
#12. When still warm put lid in
place and glue edges from back side
#13. Let completely cool then drill
a hole in upper section for mounting
#14. Go to point B and remove one
inch of vinyl
#15. Carefully open a small section
of braid and pull center insulator up
#16. Remove insulation on center
wire
#17. Reposition braid over center
wire neatly and solder together
#18. Cover entire area with hot
glue and let cool
#19. Repeat steps 14 through 18
at point D
#20 Solder together center and
braid at points A and E
#21 Cover these points with hot
glue and let cool
Mounting and tuning
#1. Take some strong small weather resistant rope and install it on each end by using half hitches in about a one foot
area at the end dipole section at A and E also attach a small rope in the hole
that you drilled in the frosting container.
#2. Install plastic insulators
at end of rope
#3. Hang antenna up using strong
rope and connect to radio and SWR meter
#4. Check SWR and determine resonate
frequency (lowest SWR)
#5. If tuning is necessary lower
longer/ higher shorter if SWR is flat at 3.895 then you need to remove
equal length on each end and re-hang and check SWR. If SWR is flat at 3.945 then
you need to lengthen the antenna. You can do this simply by soldering a length
of standard dipole material to each end.
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WG5B Web Designs
This Page was created, January 22, 1997
Updated
9-03