M2 Antenna Systems, Inc.

Model No: 40M4LLDD-125

SPECIFICATIONS:
Model ........................................ 40M4LLDD-125 Input Connector.......................... SO-239, “N” avl.
Frequency Range ...................... 7.0 To 7.3 MHz Power Handling.......................... 3 kW, Higher avl.
*Gain .......................................... 7.5 dBi Boom Length / Dia ..................... 42” x 3” x .125
Front to back .............................. 22 dB Typical Maximum Element Length ......... 51 ft.
Beamwidth ............................... 60 deg. Turning Radius:.......................... 33 ft.
Feed Impedance........................ 50 Ohms into 1:1 balun Wind area / Survival................... 13.3 Sq. Ft. / 125 MPH
Maximum VSWR ....................... 1.2:1, 2.0:1 max Weight / Ship Wt. ....................... 185 Lbs. / 190 Lbs.

*Subtract 2.14 from dBi for dBd

FEATURES:
The recently upgraded, computer optimized, linear loaded, dual driven 40M4LLDD-125 gets the bandwidth and maintains per-
formance across the band like no other 40 meter Yagi. This was a huge challenge requiring the latest techniques in computer optimi-
zation. Gain, Front to Back and VSWR are maintained nearly flat across the whole band! In addition, it is now better mechanically and
easier to assemble. Only the tips of each element are different as all the linear loading settings are the same for each element. The
shorting bars are now 2 piece, clamp type making solid long lasting connections. For foreign amateurs, two tuning options are avail-
able; FULL BAND and LOW END ACCENTUATED, but still broadband. The resulting design is head and shoulders above the compe-
tition in strength, durability and performance. This antenna has been designed to meet your crossband SSB contesting needs and give
you years of enjoyment on the 40 meter band regardless of future band plan changes.

Mechanically, the elements are sleeved double and triple wall to withstand continuous winds of 125 mph or the constant battering of
high winds and ice months at a time. This antenna WILL frustrate Mother Nature! The Driven elements are split in the center and insu-
lated with a solid 1-1/4” fiberglass rod. The parasitic element also have solid 1-1/4” center aluminum center section. The 3 kW continu-
ous, 5 kW peak, 1:1 balun completes the package. All hardware is stainless or galvanized except the U-bolts.

M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722

07/22/11
Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com Rev.01
 40M4LLDD-125 ASSEMBLY MANUAL
TOOLS NEEDED: Tools handy for assembly process: Screwdriver, 11/32, 7/16, 1/2, 9/16 and 5/8”
spin-tites, end wrenches and/or sockets, measuring tape.
A small container of zinc paste (Penetrox, Noalox, or equiv.) has been provided to enhance and
maintain the quality of all electrical junctions on this antenna. Apply a thin coat wherever two pieces
of aluminum come in contact or other electrical connections are made.
NOTE: Some element inserts or sleeves may be factory installed. Check before assembly!

BEFORE YOU BEGIN:

Look over the ELEMENT ASSEMBLY and DIMENSION SHEET drawings to get familiar with the
various parts of the antenna. If you are familiar with the construction of M2 HF antennas, the 40M4L-
125mph can be assembled mainly using the drawings. Otherwise, M2 strongly recommends using
this assembly manual. It will provide you with detailed assistance in critical areas and give overall
order and efficiency to the construction process. Take your time: Let your assembly skills enhance
the 40M4LLDD-125mph’s quality construction and performance.

TIP ELEMENT ASSEMBLY – SEE HARDWARE ASSEMBLY DRAWING, DIMENSION SHEET and
COMPRESSION CLAMP & TIP ASSEMBLY DETAIL SHEET
1. Assemble the 3/8”, 1/2” and the 3/4-inch diameter element tips first. Connect the sections with
compression clamps as shown in drawings.

OUTER ELEMENT ASSEMBLY – SEE HARDWARE ASSEMBLY DRAWINGS

2. Slide a LINEAR LOADING ARM on each 1” X 60” section. Position the arm between the two
holes. Next, insert the 7/8 x 20” sleeve and then the 7/8-inch diameter 9-inch long fiberglass insulator
in the end of each of the 1” x 60” assemblies, aligning holes. Install 8-32 x 1/1/4” screws and locknuts
to both holes. Then slide the linear loading arm up against the 8-32 x 1-1/4” screw head nearest the
end. Align it per the ELEMENT ASSEMBLY SHEET and tighten the 8-32 hardware securely.

3. Attach all the STABILIZER INSULATORS to the SUPPORT ARMS using 8-32 x 1” screws and
locknuts. Add a LINEAR LOADING ARM and stabilizer insulator assembly to each short 1 x 24"
section and position the Linear Loading Arm between the two holes 1/2" and 1-1/2" from end. Now
install the fiberglass rod / outer element assembly into the 24" section and secure with two more 8-32
x 1-1/4" screws and locknuts. Slide the linear loading arms back against the inner 1-1/4" screw head.
Align it per the LINEAR LOADING HARDWARE DETAIL and tighten the 8-32 hardware securely.

4. INNER DRIVEN ELEMENT ASSEMBLY – SEE HARDWARE / ELEMENT ASSEMBLY SHEET

A. Select a 1-1/2" OD x 60" ELEMENT SECTION, a 1-3/8" OD x 56"SLEEVE, and a 1-1/4" OD x 48”
SLEEVE. NOTE: USE ZINC PASTE OR LIGHT OIL TO EASE ASSEMBLY. Slide the sections
together as shown. Place an ELEMENT CLAMP BLOCK on the butt of the 1-1/2” section and
secure temporarily with an 8-32 x 2” screw and locknut. Add the CLAMP CAP using a 1/4-20 x 1”
flathead bolt and lock nut finger tight at this time.
B. Next, slide both polyethylene discs onto the 1-1/4” x 24” fiberglass rod. Center the discs on the rod
and space them apart by 6”. Now slide a 1-1/4" OD x 24" fiberglass rod into the butt end of a 1-
1/2 X 60" assembly. Align holes and insert a 1/4-20 x 2” bolt and locknut finger tight. Repeat for
remaining driven element sections.

5. REFLECTOR AND DIRECTOR ELEMENTS are assembled the same as the driven elements
except for the following exceptions.
 2M4 ASSEMBLY
40M4LLDD-125 MANUAL
ASSEMBLY MANUAL
1. 1-1/4" OD X 24” ALUMINUM RODS REPLACE THE FIBERGLASS RODS
2. NO ELEMENT CLAMP BLOCKS ARE USED.
3. NO POLYETHELENE DISCS ARE USED.

6. ELEMENT CLAMP ASSEMBLY – SEE ASSEMBLY DRAWINGS

A. Select two (2) #6 ELEMENT CLAMP PLATES and place together over the fiberglass center
insulators of one driven element, centering between the two poly disc insulators. NOW slide (4) 1/4-20
x 2-1/2" bolts through the BALUN MOUNTING ‘L’ PLATE outer holes and attach this assembly to the
two clamp plates and add the locknuts, finger tight. Rotate the CENTER ELEMENT SECTION until its
mounting bolts are vertical and linear loading arms are horizontal. With rod centered, tighten the 1/4-20
bolts evenly so that plates are parallel and the same amount of threads are showing through all
locknuts. Repeat for the second driven element which does not need a balun mounting ‘L’ bracket.

B. Select two more ELEMENT CLAMP PLATES and place them over center of a 1-1/4” center rod
sections. Use a thin coat of zinc paste in the grooves in the two plate halves. Loosely install 1/4-20 x 2-
1/2” bolts and locknuts in the four outer holes. Rotate the elements until the Linear Loading Arms are
horizontal. Center the element so the element is centered between the clamps and tighten the bolts
evenly so the same amount of threads are showing through the locknuts. Repeat for the second
parasitic element.

C. Bolt the welded SUPPORT POSTS (2 x 2 x .125 x 11”) to the clamp plates with the welded tab over
the element centers. Use 1/4-20 x 3-1/2" bolts and locknuts, and tighten. Repeat for all elements.

7. LINEAR LOADING ASSEMBLY – SEE ASSEMBLY DRAWINGS

A. Install a pair of LINEAR LOADING RODS to each element half. Insert a rod through each
STABILIZER INSULATOR BAR and then through a LINEAR LOADING ARM, allowing about 3/4" to
extend beyond the arm. Install 8-32 x 1/4" Allen head screws to lock rods in place.
B. Loosely assemble the LINEAR LOADING CLAMP PLATES (SHORTING BAR) pairs using 8-32 x 1”
screws and locknuts.
C. Slide one set of these shorting bars on the ends of the 3/16” linear loading rods. Measure and
mark the position for the shorting bars. Move the bars to that location and tighten one screw to
hold position. Insert a short section of BLACK PHILISTRAN CABLE (HPTG1200) through one hole,
around strain relief and back thru other hole of shorting bar then add 3/16” cable clip to secure it.
D. Alight the rods and begin to tighten all the 8-32 x 1” screws and locknuts. Be sure the rods are
parallel and have the same tension. Complete tightening the screws. Repeat for all the element
halves.
E. Place the element on a level surface with support post "up."
F. Prepare eight (8) 1/4” HOOK AND EYE TURNBUCKLES by removing the hook end and running a
1/4-20 plain nut all the way to the hook. Now replace the hook end into the turnbuckle body and
thread it in until just one thread shows inside the body of the turnbuckle. Now adjust the other end
EYE of the turnbuckle until just one thread show inside the body.
G. Install two 1/4" HOOK AND EYE TURNBUCKLES in the welded plate at the top of the LINEAR
LOADING SUPPORT POST. Install a CABLE EYE in the EYE of each turnbuckle and route the
BLACK HPTG-1200 Philistran cable through the eye and back on itself. Tension the line and linear
loading assembly and secure the cable with two cable clips as shown. Repeat for remaining
elements.
H. Now adjust the turnbuckles, adjusting so the inner sections are level. Element tips should droop
about 4" to 8". The element will be more stable in the wind if you allow some droop to remain in the
element.
 2M4 ASSEMBLY
40M4LLDD-125 MANUAL
ASSEMBLY MANUAL
8. Inspect each element for tight hardware and balanced tension on linear loading rods. Minor
tensioning adjustments can be accomplished using the turnbuckles.

8. BOOM ASSEMBLY: REFER TO THE BOOM HARDWARE ARRANGEMENT SKETCH

A. Examine the center sleeve section and straight 13 ft center boom ends for any nicks, bumps,
or chips. File smooth if found. Visually check the inside of the center tube for dirt or debris. Push a
paper or cloth towel through to remove any foreign matter. Lubricate the COUPLING RINGS on
the CENTER STIFFNER one by one as you insert the sleeve into the boom. Push the sleeve in
until it is centered in the section (.aprox 18” in from each end).
B. Install a 3/8" eyebolt into each of the 180" boom sections. Insert the swaged ends into the
center section and align the holes. Add two 1/4-20 x 3-1/2” bolts and locknuts to each joint and
tighten securely. Check that both eyebolts are oriented the same.
9. ELEMENT TO BOOM ASSEMBLY – SEE DIMENSION SHEET

A. Loosely install bottom SADDLE CLAMPS to the REFLECTOR and DIRECTOR ELEMENTS
using 1/4-20 x 2-3/4" bolts. LUBRICATE THE BOLTS WITH ZINC PASTE. Slide REFLECTOR
element onto end of boom, centering the element 3" from the boom end. Tighten up saddle clamp
bolts on element while ensuring the eyebolts are oriented up. Move to the DIRECTOR element at
other end of boom, align with reflector element and tighten saddle clamp bolts.

B. Place the REAR DRIVEN ELEMENT on the boom, spacing it 170" (14' 2"), center to center,
from the REFLECTOR ELEMENT. Install the saddle clamps and bolts, align to other elements, and
tighten clamps.

C. Place the FRONT DRIVEN ELEMENT on the boom, spacing it 130" (10' 10"), center to center,
from the REAR DRIVEN ELEMENT. Install the element so LINEAR LOADING SUPPORT POST
IS ORIENTED TOWARDS REAR OF BOOM. Install clamp hardware, align and tighten. Check
that DIRECTOR ELEMENT is spaced 202" (16' 10") from front driven element. Adjust if necessary.

10. INSTALL PHASING LINES – SEE DIMENSION SHEET

Lay out the 3/16" PHASING LINES and slide on the five (5) Delrin SPACER/STANDOFF RODS.
Arrange as shown on Dimension Sheet. USE THE 40M4LLDD PHASING LINE DRAWING AND
BEND THE 3/16” X 130” RODS AS SHOWN. Insert THE SHORT BENT ENDS of the phasing lines
into grooved channels of clamp block assemblies on REAR DRIVEN element until 1/4" extends
beyond clamp, then tighten flat head screw and locknut SLIGHTLY. Now repeat for Front Driven
Element, but DO NOT tighten clamp screw nuts until BALUN LEADS are installed in the next Step.
Note that phasing lines cross over, feeding element halves on opposite sides of the boom. Secure
standoffs to boom with nylon ties.

11. Mount the 1:1 BALUN to the 2" x 4-1/2" BALUN MOUNTING ‘L’ BRACKET using a 2-1/2" U-
bolt. DO NOT OVERTIGHTEN or balun could be damaged. Position THE BALUN INSIDE THE
PHASING LINES, at the FRONT DRIVEN ELEMENT with the connector pointing to rear and leads
easily reaching phasing line clamp block assembly screw studs. Remove nuts from flathead
screws, apply zinc paste to lead lugs, place on screw studs, check phasing lines, and retighten
nuts. Position leads to clear all metal objects by at least 1/4". Route your 50 ohm feedline section
back to boom to mast plate. Secure to boom with nylon ties.
 2M4 ASSEMBLY
40M4LLDD-125 MANUAL
ASSEMBLY MANUAL
12. OVERHEAD GUY SUPPORT SYSTEM : SEE BOOM HARDWARE ARRANGEMENT DRAWING
A. Attach one end of the 1/8” steel aircraft cable , using a cable eye and two 3/16” wire clips. Repeat
for the other eyebolt

B. Attach the BOOM-TO-MAST PLATE to the boom at balance point (boom center) using two 3" U-
bolt. Align plate perpendicular to elements.

C. TEMPORARILY install a 2" mast section and mount the 2" x 5" TURNBUCKLE PLATE and U-
BOLT 3 to 4 feet above the boom. Install the 3/8 –16 jam nuts on the EYE leg of each turnbuckle as
before and adjust the ends of the turnbuckles until just one thread shows inside turnbuckle body. Add a
cable eye to each turnbuckle eye. Slide two wire clips on the 1/8” cable and route it through the
turnbuckle eye. Tension the cables by hand and secure with the wire clips. WHEN INSTALLED ON
THE TOWER, GROSS TENSIONING IS DONE BY MOVING THE TURNBUCKLE PLATE UP. FINAL
ADJUSTMENTS ARE DONE WITH THE TURNBUCKLES.

D. Remove the temporary mast. THE GUY ASSEMBLY is ready to be reattached to the mast during
final installation. The TURNBUCKLE PLATE is then raised up the mast until the boom is straight. Then
the 2" U-bolt is tightened.

13. This completes the assembly of the 40M4LLDD-125mph. PLEASE BE SAFETY CONSCIOUS
DURING INSTALLATION AND ALWAYS USE GOOD QUALITY 50 OHM FEEDLINE AND
CONNECTORS.

Carefully designed and manufactured by:

M2 ANTENNA SYSTEMS, INC.

4402 N. Selland Ave., Fresno, CA 93722
(559) 432-8873 Fax: 432-3059
www.m2inc.com Email: sales@m2inc.com
 2M4 ASSEMBLY
40M4LLDD-125 MANUAL
ASSEMBLY MANUAL
40M4LLDD PHASING LINE
THIS 10" STRAIGHT SECTION
ALLOWS CLEARANCE FOR
BECAUSE OF THE BEND RADIUS BALUN MOUNTING.
AND THE REQUIRED SMALL HOLES
IN THE PHASING LINE SUPPORT
INSULATORS, THE USER IS REQUIRED 10.0"
PHASING LINE TO BEND THE TWO PHASING LINES
INSULATORS (5) AT THE TIME OF ASSEMBLY. 5.0

3.75
& LARGE NYLON TIE
PHASING LINES
3/16" ALUM. ROD (2)
1:1 BALUN
5.0

3.75
2-1/2" U-BOLT & SADDLE (1)
5/16-18" NUTS (2) MATERIAL: ( 2) 3/16" X 132"
5/16 LOCKWASHERS (2) 6061-T6 ROD
BALUN MOUNTING
'L' PLATE, 6" (1) 4.0" MAKE TWO IDENTICAL PARTS
ATTACH BALUN LEADS TO
PHASE LINE CLAMP CAPS
1/4-20 X 1" FLAT HEAD
BOLT AND LOCKNUT (8)

NOTE:
1/4-20 X 2" BOLT STANDARD 3" OVERLAP
AND LOCKNUT (8) FOR ELEMENT SECTIONS
ELEMENT ASSEMBLY EXCEPT FOR 1/2" TIPS
1-1/4" x 24" ROD:
FIBERGLASS=REF& DIR 8-32 X 1-1/2" 8-32 X 1-1/4"
ALUMINUM=DRIVEN EL. 8-32 X 1-3/4" SCREW & SCREW & 1/2" COMPRESSION
SCREW & LOCKNUT 1"x24" LOCKNUT CLAMP
LOCKNUT
3/8" x SEE
3/4"x18" 1/2 X 39" CHART
1-1/2"x 60" 1-1/4" x 60 1"x 60"

7/8"x 9" FIBRGLASS ROD 5/8" COMPRESSION

1-3/8" x 56" 1-1/8" x 56" CLAMP
7/8"x 19-7/8" 7/8" x 26"
8-32 X 1"
1-1/4" x 48" 1"x 27" SCREW AND LOCKNUT
SUPPORT ARM FOR
NOTE: SOME INSERT TUBING MAY BE FACTORY INSTALLED. STABILIZER BAR
LINEAR LOADING
8-32 X 1-1/4" ARM (2)3/16" SHAFT
SCREW & RETAINERS
1 X 6" LOCKNUT
7/8" X 9"
TOP VIEW - LINEAR LOADING/ELEMENT CLAMP HDWE BLACK ABS
STABILIZER BAR FIBERGLASS
(BUTT AGAINST ROD
1-1/4" TUBE)
1/4-20 X 2-1/2" 1/8" CABLE CLIPS KEEPERS, OR
BOLTS & LOCKNUTS 3 PER EACH SHAFT RETAINERS
4 PLCS PER ELEMENT ELEMENT HALF 1 ON EACH END 8-32 X 1-1/2"
SCREW AND LOCKNUT
8-32 X 1/4"
SET SCREW

LINEAR LOADING HARDWARE DETAIL

8-32 X 1" SCREWS &

LOCKNUTS (5)
3/4 X 3/4 X 11" LINEAR LOADING
1/4-20 X 3-1/4" LINEAR LOADING SUPPORT POST SHORTING BAR HALVES
BOLTS & LOCKNUTS WITH WELDED TOP PLATE (2) PER ELEMENT HALF 3/8" FORGED TURNBUCKLES (2)
2 PLCS. PER ELEMENT

1/8" STEEL AIRCRAFT CABLE,

2 CABLE EYES AND 4 WIRE CLIPS
ON EACH END.

8 X 8 X 1/4 BOOM TO MAST PLATE

3" X .125 X 180" SOE 3" X .125 X 180" SOE

3/8 X 4" 3" X .125 X 156"

FORGED USE 1/4-20 X 3-1/2" USE 1/4-20 X 3-1/2"
EYEBOLT (2) BOLTS & LOCKNUTS BOLTS & LOCKNUTS

2-1/2 X .125 X 120" STIFFNER

BOOM HARDWARE ARRANGEMENT

 2M4
40M4LLDD-125
ELEMENT ASSEMBLY
HARDWARE
40M4LLDD-125 PARASITIC
MANUAL
ASSEMBLY MANUAL 1/4-20 SS
JAM NUTS

SHORTING BAR
AND STRAIN
RELIEF DETAIL

1/4" STAINLESS
TURNBUCKLE (2)
8-32 x 1"
SCREW & 3/4" X 3/4" X .125" WALL
LOCKNUT (5) VERTICAL SUPPORT
CABLE EYE POST

1/4-20 X 2"
BOLT & LOCKNUT
WIRE NUTS (2)

POLY DISC
INSULATOR
3/16" LINEAR
LOADING ROD (2)

1/4-20 X 2-1/2"
1-1/2 X 60" SOE BOLT AND LOCKNUT
1/4-20 X 3-1/4"
1-1/4" X 24" BOLT & LOCKNUT
.
ALUM. ROD
ELEMENT CLAMP BLOCK
1/2" X 3" X 6" (SIZE #6)
1-3/8 X 56" SLEEVE

1/4-20 X 2-3/4"
BOLT (4) BOOM, 3"O.D.
1-1/4" X 48" SLEEVE X .125 WALL
(BUTTS ON CENTER ROD) 1/2 x 1 x 4" CRADLE (2)

DRIVEN ELEMENT HARDWARE

40M4LLDD-125
3/4" X 11" SQ. RISER
& WELDED TOP PLATE 3/16" LINEAR
1/4" TURNBUCKLE LOADING ROD
AND JAM NUT

HPTG 1200 SHORTING BAR PAIRS

PLILLISTRAN 3/4" X 3/4"
(1) CABLE EYE VERTICAL SUPPORT
8-32 X 1" (3) CABLE CLIPS POST
SCREW & PHASING LINE
LOCKNUT CLAMP CAP
5 PER SIDE
1/4-20 X 1" FLAT HEAD
BOLT & LOCKNUT

1/4-20 X 2"
BOLT & LOCKNUT
PHASING LINE
STANDOFF
1-1/4" X 24"
FIBERGLASS ROD PHASING LINE
CLAMP BLOCK

POLY DISC
INSULATOR
8-32 X 2" SCREW &
LOCKNUT
NYLON TIE
1/4-20 X 2-1/2"
BOLT AND LOCKNUT
1-1/2 X 60" SOE
1/4-20 X 3-1/4"
BOLT & LOCKNUT
1-1/4" X 24"
FIBERGLASS ROD ELEMENT CLAMP BLOCK
1/2" X 3" X 6" (SIZE #6)
1-3/8 X 56" SLEEVE
CRADLE
1/2" X 1" X 4"

BOOM, 3"O.D.
1/4-20 X 2-3/4" BOLT X .125 WALL

1-1/4" X 48" SLEEVE

(BUTTS ON CENTER ROD)
 2M4 ASSEMBLY
40M4LLDD-125 MANUAL
DIMENSION SHEET
ELEMENT SPACINGS
CENTER
TO REFLECTOR ELEMENT 5/8" COMPRESSION
0 CLAMP 1/2" COMPRESSION
CENTER 1" X 24"
3/16" x 114" ROD CLAMP

1.5" 1-1/4" X 60"

1-1/2" X 60" SOE 1" X 60" 3/4" X 18" 1/2" x 39.0 3/8" x SEE
3/16" x 111" ROD CHART

36" 108.5 "

3/8" EYEBOLT
3/8" LOCKWASHER LINEAR LOADING (40M) ELEMENT
3/8-16 NUT 3/8" EXPOSED TIP DIMENSIONS
3" x .125" x 180" SOE

FULL BAND CW / LO FONE

REFLECTOR 55.5" 57.5"
REAR DRIVEN 42.25 48.00"
176"
FRONT DRIVEN 32.5" 35.375"
DIRECTOR 27.0" 27.0"
5/8" COMPRESSION
175"
REAR DRIVEN ELEMENT 1" X 24"
CLAMP 1/2" COMPRESSION
3/16" x 114" ROD CLAMP

177.5" 1-1/4" X 60"

1-1/2" X 60" SOE 1" X 60" 3/4" X 18" 1/2" x 39.0 3/8" x
3/16" x 111" ROD
2-1/2 X .125 X 120" STIFFNER
3" x .125" x 156" STR

108.5 "
BOOM TO MAST PLATE
124" NEAR BALANCE POINT

FRONT DRIVEN ELEMENT 5/8" COMPRESSION

CLAMP 1/2" COMPRESSION
3/16" x 114" ROD 1" X 24" CLAMP

301.5" 1-1/4" X 60"

1-1/2" X 60" SOE 1" X 60" 3/4" X 18" 1/2" x 39.0 3/8" x
3/16" x 111" ROD
331"
NOTE:
108.5 " STANDARD 3" OVERLAP
FOR ELEMENT SECTIONS
EXCEPT FOR 1/2" TIPS
3" x .125" x 180" SOE

202"
3/8" EYEBOLT
3/8" LOCKWASHER
3/8-16 NUT
470" DIRECTOR ELEMENT 5/8" COMPRESSION
CLAMP 1/2" COMPRESSION
3/16" x 114" ROD 1" X 24"
CLAMP

503.5" 1-1/4" X 60"

1-1/2" X 60" SOE 1" X 60" 3/4" X 18" 1/2" x 39.0 3/8" x
506" 3/16" x 111" ROD

108.5 "
 2M4 ASSEMBLY
40M4LLDD-125 MANUAL
ASSEMBLY MANUAL
COMPRESSION CLAMP & TIP ASSEMBLY DETAIL
 2M4 ASSEMBLY
40M4LLDD-125 PARTSMANUAL
& HARDWARE
UN-BAGGED ITEMS
DESCRIPTION QTY
ASSEMBLY MANUAL 1
CENTER COUPLING, 1.25" X 24” ALUMINUM ROD..........................2
INSULATOR, CENTER, 1.25” X 24" FIBERGLASS ROD ...................2
BOOM TO MAST PLATE, 8 X 8 X .25 .................................................1
BALUN, 1:1, COAXIAL.........................................................................1
STEEL CABLE, 1/8” AIRCRAFT" X 20 FT...........................................2
SUPPORT POST, LL, 3/4 X 11 X .1/8” WELDED ALUM.....................4
TENSION LINE, LL, PHILLISTRAN HPTG1200 X 44”.........................8
NYLON TIE, LARGE 11"......................................................................8
ZINC PASTE, (PENETROX OR NOALOX OR EQUIV.) ......................2

ALUMINUM TUBING
BOOM, 3.0 X .125 X 180” SOE ALUM.................................................2
BOOM, 3.0 X .125 X 156” ALUM. ........................................................1
BOOM STIFFENER, 2-1/2 X .125 X 120" W / COUPLING RINGS .....1
SLEEVE, 1.375 X .058 X 56" ...............................................................8
SLEEVE, 1.25 x .058 X 48”..................................................................8
SLEEVE, 1.125 X 56"..........................................................................8
SLEEVE, 1.0 X 27"...............................................................................8
SLEEVE, 0.875 X .058 X19.875" .........................................................8
SLEEVE, 0.875 X .058 X 26" ...............................................................8
ELEMENT, 1.5 X .058 X 60” SOE........................................................8
ELEMENT, 1.25 X .058 X 60” SOE......................................................8
ELEMENT, 1.0X .058 X 60” SOE.........................................................8
ELEMENT, 1.0 X .058 X 24" ................................................................8
ELEMENT, 0.75 X .049 X 18” SOE......................................................8
ELEMENT, 0.5 X .049 X 39" ................................................................8
ELEMENT TIP, 3/8 X 60” .....................................................................2
ELEMENT TIP, 3/8 X 51” .....................................................................2
ELEMENT TIP, 3/8 X 38.375” ..............................................................2
ELEMENT TIP, 3/8 X 30” .....................................................................2

ALUMINUM ROD
LINEAR ELEMENT, 3/16 X 114" ALUM. ROD.................................... 8
LINEAR ELEMENT, 3/16 X 111” ALUM. ROD.....................................8
PHASING LINE, 3/16” X 132” ALUM. ROD .........................................2

BAG #1
LINEAR LOADING ARM, .375 X1.25 X 3-3/4” ...................................16

BAG #2
INSULATOR, STABILIZER BAR, NON-METALLIC, 1 X 6" X 1/4”.......8
SUPPORT ARM, INSULATOR STABILIZER BAR ..............................8
 2M4 ASSEMBLY
40M4LLDD-125 PARTSMANUAL
& HARDWARE
BAG #3
INSULATOR, DISC POLYETHELENE, 1-1/4" ID. ...............................4
ELEMENT CLAMP BLOCK, 1-3/4 X 2-5/8 X 3/8” MACH ALUM..........4
CLAMP CAP, 1-1/4 X 3/4 X 1/4” MACH. ALUM...................................4
INSULATOR, STANDOFF .625 X 2.5" DELRIN ..................................5

BAG #4
SHORTING BAR HALF, LL .25 X .50 X 5.75" ALUM BAR ................16
STRAIN RELIEF, 1/2 X 1/2, BLK DELRIN ...........................................8

BAG #5
SADDLE, CLAMP, 1 X 4 X 1/2" MACH................................................8

BAG #6 & #7 TOGETHER

ELEMENT CLAMP PLATE, 3 X 6 X 1/2" MACH. #6 (.625 RAD). ........8

BAG #8
TURNBUCKLE PLATE, 2 X 5" X .188 .................................................1
EYE BOLT, 3/8 X 4”, FORGED............................................................2
TURNBUCKLES, 3/8, FORGED, JAW AND EYE................................2
TURNBUCKLES, 1/4 X 6” HOOK AND EYE........................................8
BALUN MOUNTING ‘L’ PLATE, 1" X 1” X 6” .......................................1

BAG #9
INSULATOR, LINEAR, .875 X 9.0" FIBERGLASS ROD ....................8

BAG #10
U-BOLT AND SADDLE, 3" (B00M) ......................................................2
U-BOLT AND SADDLE, 2-1/2" (BALUN MTG) ....................................1

BAG #11
U-BOLT AND SADDLE, 2" HEAVY DUTY (MAST) .............................4
U-BOLT AND SADDLE, 2" STD (TURNBUCKLE PLATE) ..................1
 2M4 ASSEMBLY
40M4LLDD-125 PARTSMANUAL
& HARDWARE
BAG #12
NUT, 3/8-16 SS ................................................................................. 16
LOCKWASHER, 3/8" SPLIT RING, SS ............................................. 16
NUT, 5/16 ............................................................................................ 4
LOCKWASHER, 5/16 .......................................................................... 4
BOLT, 14/-20 X 3-1/2" HEXCAP SS.................................................... 4
BOLT, 1/4-20 X 3-1/4" HEX CAP SS................................................... 8
BOLT, 1/4-20 X 2-3/4" HEX CAP SS................................................. 16
BOLT, 1/4-20 X 2-1/2" HEX CAP SS................................................. 16
BOLT, 1/4-20 X 2" HEX CAP SS......................................................... 8
SCREW, 1/4-20 X 1" FLAT HEAD SS................................................. 4
NUT, 1/4-20 ......................................................................................... 8
NUT, 1/4-20, LOCKING SS ............................................................... 40

HARDWARE BAG #13

SCREW, 8-32 X 2-1/4” PAN SS .......................................................... 4
SCREW, 8-32 X 1-3/4” PAN, SS ....................................................... 16
SCREW, 8-32 X 1-1/2 PAN SS ......................................................... 40
SCREW, 8-32 X 1-1/4 PAN SS ......................................................... 56
SCREW, 8-32 x 1 PAN SS ............................................................... .64
SCREW, 8-32 X 3/4” PAN, SS ............................................................ 8
SCREW, 8-32 X 1/2” PAN, SS .......................................................... 16
NUT, 8-32 LOCKING SS ................................................................. 188
NUT, 8-32, SS ................................................................................... 16
WIRE CLIP, 1/8” GALV. .................................................................... 32
CALBLE EYE (THIMBLE) 3/16” ........................................................ 12
COMPRESSION CLAMP, 5/8” . .......................................................... 8
COMPRESION CLAMP, 1/2” ............................................................. 8

BAG #14
SET SCREW, 8-32 X 1/4 INT HEX SS.............................................. 16
SHAFT RETAINERS, 3/16” SS ......................................................... 32
ALLEN WRENCH, 5/64 ....................................................................... 1
PUSH TUBE FOR KEEPER INSTALL. 3/8 X 3".................................. 1

Carefully designed and manufactured by:

M2 ANTENNA SYSTEMS, INC.

4402 N. Selland Ave., Fresno, CA 93722
(559) 432-8873 Fax: 432-3059
www.m2inc.com Email: sales@m2inc.com