MFJ -1796 Instruction Manual page 7

MFJ-1796W
[ ] 10. Insert the fiberglass center insulator into the bottom element and insert a 1/4" x 7/16" head
bolt with a lock washer through the hole. Thread a 1/4" x 7/16" nut on the other end.
Finger tighten only. See Figure 3. Slide a hose clamp over the center insulator. Tighten
the hose clamp on the slit in the bottom element. Slide another hose clamp over the
insulator.
[ ] 11. Slide the top 1" diameter element over the center insulator and install the 1/4" x 7/16"
head bolt and nut as in step 10. Tighten the hose clamp over the slit in the top element
until the element will not sway.
[ ] 12. Install the short 6-32 screws in the ring of both loading coil assemblies away from the
hose clamps and brackets.
capacitance spokes in the six holes in these rings on both coil assemblies. Tighten the
screws until the spokes are snug. At this point you should be able to turn the coil
assemblies over and they should balance on the long spokes. USE THE #1 PHILLIPS
SCREWDRIVER HERE.
[ ] 13. Install the screws in the next set of rings and install six short spokes in these rings.
[ ] 14. Install the next groups of four spokes on each loading coil assembly.
[ ] 15. Check the bare wires running along the side of the loading coil assembly to be sure that
there is at least 1" of clearance between the bare wire and the capacitance spokes. It is
okay to bend the bare wire enough to clear the spokes properly. See Figure 7.
[ ] 16. Remove the nuts on the center insulator bolts of the main element and install the center
conductor lug of the coax under the upper element nut and the shield lug under the
bottom element nut. Hold the nut in place and turn the bolt head to tighten these bolts so
that the lug does not break off the end of the coax. Be sure to dress the coax so it loops up
in a drip loop so water cannot get into the end. See Figure 8.
[ ] 17. Use the three wire ties to affix the coax to the antenna as illustrated on page 1. Do not
allow the coax to come within 1 inch of the base mounting bracket.
[ ] 18. Slide a hose clamp over the top element. Mount the top coil assembly to the antenna by
inserting the fiberglass insulator in the top element. Tighten the bus wire from the coil
assembly under the hose clamp.
[ ] 19. Mount the coil assembly with the angle mounting bracket four inches from the bottom
insulator of the antenna.
[ ] 20. Double check the tightness of all the hardware you installed and then mount the antenna
on the short temporary tuning mast.
[ ] 21. Tune the antenna, see the next section.
Do not thread the screws completely in. Put the long
WARC Band Vertical Antenna