MFJ-1795 Vertical Antenna
Instructions
5
[ ]
Two 7/16" open end wrenches or one wrench and one nut driver for the U-bolts.
[ ]
Heavy Wire cutters for trimming capacitance spokes.
[ ]
Safety glasses.
[ ] 4.
Decide on the approximate height of the antenna. Maximum height will be just under 10
feet while minimum will be 6 1/2 feet.
[ ] 5.
The 6 1/2 foot level can be reached by using the 5’ radiator. If this is the desired height
steps 6-8 may be skipped. Heights above this level will be reached using the additional
pieces of tubing.
[ ] 6
. Now take the 1.0” x 30” piece of aluminum and place at a minimum 2 inches into the
long aluminum element (5’ x 1 1/8”). The end of the long (5’) piece used should be the
one without the hole drilled in it. See Figure 1.
[ ] 7.
A hose clamp should be placed around the 1 1/8” pipe to secure it in place. Tighten it with
the 5/16” nut driver.
[ ] 8
. A minimum of 2 inches of the 9” x 1 1/8” pipe should be placed onto the 1.0” x 30” piece
of aluminum and secured with a hose clamp.
Figure 1
NOTE:
The length of tubing placed inside 1 1/8” tubing will determine the overall height of
the antenna.
[ ] 9.
Now the hollow fiberglass insulator should be placed approximately 3 1/2” into the 60” x
1 1/8” aluminum tubing. See Figure 2.
Fiberglass Insulator
Solder Lug
60 x 1 1/8 Mast Pipe
Antenna Feed Point
Hose Clamp
Figure 2
