MFJ -1796 Instruction Manual page 6

MFJ-1796W
Warning: Do not tighten the screws that connect the loading coil terminal lugs to the
capacitance hats or you will BREAK the fiberglass form. If the terminal lugs
loosen tighten the NUT down on the lug.
Step-By-Step Procedure
[ ] 1. Prepare a temporary ground-level mounting mast that will permit easy initial testing and
adjustment. Set up saw horses or any other stable support (plastic trash cans or folding
tables, etc.) near the mast.
[ ] 2a. Sort out the parts you have unpacked into groups of similar parts. Be sure all the parts are
available.
[ ] 3. After examining the antenna parts, gather the tools needed for basic assembly. At the
minimum these consist of:
[ ] #1 Long Phillips screwdriver for capacitance spoke screws
[ ] #2 Phillips screwdriver for other 6-32 screws
[ ] 1/4" standard screwdriver or a 5/16" nut driver for hose clamps.
[ ] 3/8" wrench for 6 and 2 meter stub nuts
[ ] Two 7/16" open end wrenches or one wrench and one nut driver for "U" BOLTS and
center insulator bolts.
[ ] Wire cutters for trimming capacitance spokes.
[ ] Safety glasses.
IMPORTANT: Do not use a high torque electric screwdriver to mount the capacitance
spokes. The screw heads will be sheared off if too much torque is applied.
[ ] 4. Bolt the top balun hole loosely to the top hole in the base mounting assembly with a 1/4-
20 x 7/16" nut and the 1/4" x 7/16" head bolts. Use the hollow white nylon spacers to
separate the balun from the mounting bracket. Finger tighten only. See Figure 2.
[ ] 5. Bolt the bottom balun hole to the bottom hole in the base mounting assembly as in Step 5.
[ ] 6. Tighten the balun bolts with a 7/16" wrench.
[ ] 7. Bolt the coax connector assembly to the base mounting assembly with four 6-32 x 5/8"
screws and 6-32 nuts. See Figure 2.
[ ] 8. Slide the bottom radiator (the one with two sets of holes) over the fiberglass rod with the
holes that are 2" from the end toward the base mounting bracket. Slide a hose clamp to
the bottom of the element. The radiator should butt against the insulating plastic of the
base mounting bracket. Install a 1/4 x 7/16" bolt through the element and fiberglass rod
and tighten with a lock washer and 1/4 x 7/16" nut.
[ ] 9. Tighten the hose clamp installed in step 9 over the slit in the bottom element. This clamp
will make the antenna more rigid.
WARC Band Vertical Antenna