M2 Antenna Systems 40M4LLDD, Assembly Manual

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A. Install the 3/8” EYEBOLTS to the outer ends of the boom, securing with stainless 3/8-16 nuts and
lock washers. Align the eyes parallel with the boom and tighten.
12. Orient the boom with the eyebolts "up”. Note the location of the REAR end of the antenna and
parasitic elements as shown on the DIMENSION SHEET. Using a tape measure and a marking pen
or masking tape, place a mark 1/2” in from the
rear of the boom. This will be where you position the
back edge of the clamp plate for the reflector element. Repeat the same procedure for the other three
elements.
13. For ease of element installation, support the boom about 3’ above ground, eyebolts "up." Place
the reflector element on the boom. Loosely attach two BOTTOM CRADLES to the bottom of the
clamp plates
ON THE REFLECTOR AND DIRECTOR using the 1/4-20 x 2-3/4" bolts. (BE SURE TO
USE ZINC PASTE ON THESE THREADS) Slide the back edge of the rear plate to your first mark.
Level the reflector element and tighten all four bolts EVENLY and firmly. Repeat for the DIRECTOR
on the other end of the boom.
14. Mount the TWO DRIVEN ELEMENTS assemblies in their respective positions, then attach the
two bottom cradles and 1/4-20 hardware to each. After aligning these two elements with the reflector
element, tighten the 1/4-20 bolts evenly and firmly.
15. Now take a step back for a moment to observe any misalignment (if any) and the “droop” in each
element. Simply look down either the front or back of the boom to do this. If you have not already
done so, adjust each turnbuckle until each element droops 6 to 10 inches at the tip. NOTE: The
elements are the most stable in wind with a small amount of tip droop. ADJUST FOR LEVEL INNER
SECTIONS. After the adjustments have been made, proceed with tightening the 1/4-20 JAMNUT on
all the turnbuckles.
16. INSTALLING PHASING LINES - SEE ASSEMBLY DRAWINGS AND DIMENSION SHEET
Take the remaining Select two of the 3/16 x 132” PHASING LINE RODS and slide 5 Delrin PHASING
LINE INSULATORS at least 1ft. onto the rods
(they cannot be installed after rods are bent ). Bend
the rods as shown on the 40M4LLD PHASING LINE SHEET. Note that each phasing line crosses
boom to feed an opposite element half.
17. Apply a little Penetrox to the phasing line tips and INSERT the lines into the grooved channels of
clamp block assemblies on
Rear Driven element. Push the lines through until at least 1/4" extends
beyond clamp and then tighten the flathead clamp screws. Push the clamp block assemblies up next
to disc insulators and tighten 8-32 x 2" clamp screws. Spread out the Delrin Standoff / spacers equally
across the long central section of the rods, the two outside spacers next to the bends. SECURE THE
STANDOFFS on the boom with the large nylon ties. Reshape bends if needed, so rods exit the
standoffs and connect to clamps without stress or tension. Now repeat for Front Driven Element, but
do not tighten clamp screw nuts until the balun is installed in the next step. Secure standoffs to boom
with nylon ties.
18. 1:1 HF BALUN INSTALLATION
Mount the BALUN to the 1” x 1” x 6” angle bracket using a 2-1/2" U-bolt. DO NOT OVERTIGHTEN OR
BALUN HOUSING COULD BE DAMAGED. Position assembly just forward of Front Driven element,
connector pointing to rear and the leads easily reaching phasing line clamp block screw studs.
Remove nuts from flathead screws, apply zinc paste to lead lugs, place on screw studs, and retighten
nuts. Position leads to clear all metal objects by at least 1/4". Cut off any excess phasing rods that
extend more than 1/4”.
40M4LLDD ASSEMBLY MANUAL