MFJ-1795 Vertical Antenna
Instructions
10
WARNING:
Serious burns can be received with improper use of a soldering iron.
[ ] 5.
The wire should now be soldered to the center pin of the SO-239 connecter.
[ ] 6.
Remove the fiberglass tubing from the aluminum tubing of the assembled antenna by
loosening the hose clamp. Place the solder lug, under the hose clamp and retighten.
[ ] 7.
Insert the fiberglass tubing through the U-bolts and tighten the nuts. This will make base
installation much easier.
[ ] 8.
Adjust the wire length so that it approaches the soldering lug at the antenna feed-point.
[ ] 9.
Carefully solder the insulated wire to the solder lug.
[ ] 10.
Tighten the nuts on the U-bolts firmly.
[ ] 11.
Re-attach the antenna to the fiberglass tubing by tightening the hose clamp. Remember to
place the solder lug attached to the center conductor of the coax under the hose clamp
[ ] 12
. Make sure that the aluminum tubing, the insulated wire, and solder lugs
DO NOT COME
INTO CONTACT WITH THE ANTENNA BASE
. Small readjustments of the
fiberglass insulator may necessary.
REMOVING THE ANTENNA FROM THE BASE OR BRACKET
The antenna may be quickly removed to be hidden from view. This is easily accomplished by
loosening the hose clamp at the base of the antenna shown in Figure 2. Carefully pick up the
antenna mast. Be sure to watch for overhead tree limbs and other objects that could come in
contact with the antenna during removal. These objects could cause the antenna to become
unbalanced and fall, resulting in personal injury and damage to the antenna. Store the antenna in
a safe place to prevent damage.
FREQUENCY AND SWR ADJUSTMENT
This antenna covers wider frequency ranges on the higher bands, and narrower segments on the
lower frequency bands. The 40 meter band has the narrowest range of operation (approximately
40 KHz) and is the most sensitive to adjustments.
The entire antenna must be accessible during initial tuning and testing. If the MFJ
Ground
Coupled™
Portable Antenna Base is used, attach the antenna to the base and place it in a
location away from buildings or other objects that could affect the measurements. If the portable
antenna base is not used, it is best to install the antenna on a short, temporary mast or pipe.
