Steps For Building The Hog Fence Antenna 
 
Hobby tubing and brass stock can be found at hobby and hardware stores.  Ace 
Hardware usually has a good selection in stock. 
 
 
A.	DRIVEN ELEMENT 
 
1.	Fashion and drill the 1" x 2.5" brass plate. 
 
2.	Bend the 1/8" x 36" brass welding rod in the center.  Look at the 
diagram to make sure that the rod is bent 	into a "U" shape maintaining 
the proper 3/16" gap between the two 7.5" pieces. 
 
3.	BEFORE making the last two bends on the welding rod, slip the rod 
through the two holes in the brass 	plate.  DO NOT solder it yet, just make 
sure it has a tight fit to facilitate future adjustments. 
 
4.	Prepare the two 5/32" x 12" pieces of brass tubing and slip them over 
the ends of the welding rod. 
 
 
B.	FEED LINE ASSEMBLY  
 
1.	Strip the end of the 3' coaxial cable as shown in the enlarged detail of 
the drawing.  Solder the center 	conductor to the upper section of the U-
bent rod and solder the braided shield to the lower section.  Be 	careful not 
to melt the insulation on or inside the cable.  Secure the the cable to the 
lower section of the U-	bent rod with a black nylon wire tie. 
 
2.	Install the desired connector plug on the other end of the  cable.  
 
 
C.	ASSEMBLING THE DRIVEN ELEMENT TO THE FENCE WIRE 
 
1.	Solder or braze the brass plate (and driven element) to the section of 
Hog Fence as shown in the diagram. 	Be careful not to damage the coaxial cable 
by allowing it to be heated excessively.  Note that the openings 	in the fence 
are to be positioned with the narrow direction running vertically. 
 
2.	Use plenty of black nylon wire ties to attach the two 36" pieces of 
copper tubing to the rear of the fence. 	Bend the fence into the described 
parabolic shape using the measurements shown in the chart. 
 
 
D.	TUNING AND TESTING 
 
1..	If your antenna is correctly assembled, it should be fairly close to 
being properly tuned already. The best 	way to tune an antenna is to 
transmit through it and adjust for minimum reflected power.  This is not 
	really 	critical here, unless you plan to transmit with this 
antenna.   
 
2.	To tune the antenna, slide the two 5/32" pieces of brass tubing on the 
ends of the U-bent rod to the 	suggested lengths.  Now slide the entire 
element into and out of the brass plate.  You will be able to use 	these 
three adjustments to optimize performance. 
 
3.	Once the antenna has been tuned, solder everything into place and re-
check the parabolic shape. 
 
 
E.	INSTALLATION 
 
1.	Install the antenna as high as possible, connect the best antenna cable 
you can afford, and point the open 	end of the parabola towards Sweat Mountain 
in Northern Cobb/Fulton county.   
 
2.	Tune in the signal and ENJOY! 
										5/5/94