M2 Antenna Systems 40M4LLDD Manuel utilisateur

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

Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com

Rev.00

Model ........................................40M4LLDD

Frequency Range.......................7.0-7.3 MHz

Gain............................................7.5 dBi

Front to back..............................22 dB

Beamwidth ...............................E=60°

Feed type...................................Dual Driven

Feed Impedance........................50 Ohms Unbalanced

Maximum VSWR........................2.0:1 Max

Input Connector..........................SO-239, Other avl.

Power Handling..........................3 kW, Higher avl.

Boom Length / Dia......................42’ / 3.0 x .125 Wall

Element Length / Dia..................51 Ft

Turning Radius:..........................33 Ft

Stacking Distance.......................Call

Mast Size....................................2” to 3 ” Nom.

Wind area / Survival...................13.0 Sq. Ft. / 100 MPH

Weight / Ship Wt.........................142 Lbs. / 160 Lbs.

M2 Antenna Systems, Inc.

Model No: 40M4LLDD

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

FEATURES:

The recently upgraded, computer optimized, linear loaded, dual driven 40M4LLDD 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 com-

puter optimization. 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 available; FULL BAND and LOW END ACCENTUATED, but still broadband.

The resulting design is head and shoulders above the competition 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 butt sleeved to withstand continuous winds of 100 mph or the constant battering of high

winds . This antenna WILL frustrate Mother Nature! The Driven elements are split in the center and insulated with a solid

1-1/4” fiberglass rod. The parasitic element also have solid 1-1/4” center aluminum center section. The 3 kW continuous,

5 kW peak, 1:1 balun completes the package. All hardware is stainless or galvanized except the U-bolts. Options include

parts to add 4 elements for 17 or 20 meters. Call for details.

BEFORE YOU BEGIN: Look over the DIMENSION SHEET, HARDWARE AND ELEMENT ASSEMBLY

DRAWINGS to get familiar with the various parts of the antenna. Tools handy for assembly process:

screwdriver, 11/32, 7/16, 1/2, 9/16 and 5/8” nut drivers, end wrenches and/or sockets, diagonal cutters,

and measuring tape. Small containers 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 any other electrical connections

are made.

1. ELEMENT CLAMP BLOCK ASSEMBLY.

SEE “ELEMENT HARDWARE” drawing to aid in the assembly of this step. Start by assembling the

four pairs of ELEMENT CLAMP PLATES together with 1/4-20 x 2-1/2" bolts to the four outer holes.

NOTE THAT ONE SET OF CLAMP PLATES WILL ALSO GET A 1” X 1” X 6” ANGLE BRACKET FOR

MOUNTING THE BALUN. Add the 1/4-20 locknuts finger tight.

A. FRONT & REAR DRIVEN ELEMENTS

On two of the element clamp plates assembled in the previous step, slip in the 1-1/4 X 24" fiberglass

rods and rotate until the element mounting holes are vertical. Center the rod and tighten the

hardware EVENLY, so the plates are parallel and the same amount of threads are showing

through all the locknuts. Slide the POLYETHYLENE DISC INSULATORS onto both ends of the

fiberglass rods and push them up against the clamp plates. The disc insulators can sometimes be a

very tight fit on the rods. If you can’t get them to fit place them in hot water a few minutes.

B. REFLECTOR AND DIRECTOR ELEMENTS

Slide the 1-1/4” x 24” CENTER COUPLING ROD into a CLAMP PLATE ASSEMBLY. Center the

assembly and align the bolt holes to vertical. Tighten all four outer element clamp plate bolts EVENLY,

starting with the two center bolts. Make sure plates remain parallel, top to bottom.

2. VERTICAL SUPPORT POST INSTALLATION. Use the ELEMENT HARDWARE drawing.

The element clamps require a 3/4” square x 11” WELDED VERTICAL SUPPORT POST to raise and

support the linear loading lines. Orient the WELDED PLATE over the element clamp plates. Insert two

1/4-20 x 3-1/4” bolts through the holes in the SUPPORT POST . Then mount the posts to the middle

two holes of each clamp plate and secure with 1/4-20 locknuts.

Prepare the 1/4-20 x 6” turnbuckles by removing the RIGHT HAND THREAD END OF EACH

TURNBUCKLE and thread on a 1/4-20 “JAM NUT” as shown on the drawings, Thread the 1/4-20 nut

all the way up at this time. The nuts will be used to “LOCK UP” the turnbuckles once all the

adjustments are done. Install a TURNBUCKLE in each hole of the welded TOP PLATE as shown in the

drawing. NOTE: The hook is inserted from UNDER the plate through the hole. Finally, install a CABLE

EYE OR THIMBLE in the EYE of each turnbuckle.

3. HALF ELEMENT ASSEMBLIES

There are 8 half element assemblies. One pair each for the Reflector, Rear Driven, Front Driven, and

Director Elements. See the ELEMENT ASSEMBLY drawing to aid in the assembly of each half

element. Also refer to the DIMENSION SHEET and ELEMENT HARDWARE DETAIL drawings. Only

the 1/2” element tip sections are different lengths. The correct hardware to join the various sizes are as

follows:

For 1-1/2" to 1-1/4" tubing use 8-32 x 1-3/4" screws.

For 1-1/4" to 1" tubing use 8-32 x 1-1/2" screws.

For 1" to 1“ and 1” to 3/4" tubing use 8-32 x 1-1/4" screws.

For 3/4" to 1/2" tips use 5/8” compression clamps.

40M4LLDD ASSEMBLY MANUAL

Locknuts have been provided for all the element assembly screws. Tighten the nuts until the joint

doesn't move when wiggled or shook. The element butt section closest to the boom always has one

hole located at the butt for a 1/4-20 bolt.

A. See the INSERT figure at the right of the ELEMENT ASSEMBLY drawing. Prepare the LINEAR

LOADING ARMS (1” center hole) with one 8-32 x 1/4” Allen head SET SCREW. (5/64 Allen

wrench supplied), one 8-32 x 1-1/2” screw and locknut. Slide a LINEAR LOADING ARM on each

1" section and position it next to the end screw.

B. Now slide the I” tube sections over the 7/8 x 9” fiberglass rod insulators. Connect the two sections

with 8-32 x 1-1/4" screws and locknuts. Orient the arms as shown and tighten the 8-32 x 1-1/2 screws

and locknuts. Be sure the arms are up against the screws closest to the fiberglass rod. THIS IS

IMPORTANT SINCE THE ARMS ARE USED FOR DIMENSIONING THE LINEAR LOADING

SHORTING BAR POSITION LATER IN THE ASSEMBLY

C. Locate the 8 black plastic, 1” x 6” linear loading stabilizer bars. Attach them to the short 3/8” x 1-

1/4” x 3” support arm with the 1 inch hole. Use 8-32 x 1” screws and locknuts. Slide these on the

SHORT, one inch element sections and position about 3” in from the butt. Now attach the 1-1/4” x 60”

element sections. Add the 8-32 x 1-1/2” screws and locknuts but do not tighten until the STABALIZER

BAR AND ARM ASSEMBLY ARE IN THE FINAL POSITION. Orient the black stabalizer bar insulators

perpendicular to the element coupling holes and the support arms. Secure with 8-32 x 1-1/2” screws

and locknuts. Repeat for the other element halves.

E. Insert the 3/4 x 48” sections into the swaged 1” sections and secure with 8-32 x 1-1/4 screws and

locknuts.

F. Following the DIMENSION SHEET and COMPRESSION CLAMP & TIP ASSEMBLY DETAIL

SHEET add the 1/2” tip sections in pairs, noting that each element has different tip lengths. Secure

with compression clamps.

G. As the outer element sections are being assembled, label each assembly as “REFLECTOR” ,

“REAR DRIVEN”, “FRONT DRIVEN”, or “DIRECTOR” (according to the 1/2” tips) to avoid mix ups.

4. REFLECTOR AND DIRECTOR ELEMENT ASSEMBLIES

See ELEMENT HARDWARE drawing.

Slide a 1-3/8” x 24" sleeve onto the 1-1/4” CENTER COUPLING ROD on one of the two ELEMENT

CLAMP ASSEMBLIES, and align the 1/4” holes. Temporarily pin the sleeve as necessary. Carefully

slide a 1-1/2” x 60” element section onto this assembly and align all holes. Insert a 1/4-20 x 2“ bolt

and tighten securely with 1/4-20 locknut. Repeat for the other element half. Now add the reflector or

director element outer half element assembly completed in the previous step to the 1-1/2" sections

using 8-32 x 1-3/4" screws and locknuts. Repeat for the other element halves.

5. PHASING LINE CLAMP BLOCK ASSEMBLY & INSTALLATION

See DRIVEN ELEMENT HARDWARE drawing.

First locate the phasing line clamp plates and clamp blocks. Apply a little zinc paste to each of the

channels. Loosely assemble the plates to blocks, channel to channel, with 1/4-20 x 1” flathead screws

and locknuts. Install a 8-32 x 2-1/4” screw and locknut in each clamp. Locate the remaining four 1-

1/2” x 60” tube sections. Apply a little zinc oxide paste to the last inch of each butt end. Install a

phasing line clamp assembly about 1/2” from the edge of the butt with small clamp plate oriented

towards the element butt. Do not tighten the hardware at this time.

6. REAR & FRONT DRIVEN ELEMENT ASSEMBLIES

See ELEMENT HARDWARE drawing.

Slide a 1-3/8” x 24" sleeve onto each end of the two 1-1/4” fiberglass rods of the remaining element

clamp assemblies and align the 1/4” holes. Carefully slide a 1-1/2” x 60” element section onto the two

40M4LLDD ASSEMBLY MANUAL

assemblies and align all holes. For both, insert a 1/4-20 x 2“ bolt and secure with 1/4-20 locknuts.

BESURE TO INSTALL THE FRONT DRIVEN ELEMENT TIPS ON THE ELEMENT CLAMP PLATE

ASSEMBLY WITH THE BALUN ANGLE BRACKET.

7. LINEAR LOADING ROD INSTALLATION (FOR BOTH ELEMENT HALVES)

Place each element assembly on a level surface with the support post up. FROM THE ELEMENT

BUTT SIDE, feed a 3/16” x 120” LINEAR LOADING ROD through the flat support insulator and on to

each LL ARM. The rod should protrude just 1/2” from each arm. Tighten the 8-32 x 1/4" set screws.

Install a SHAFT RETAINER, onto this rod tip and snug up to linear loading arm. Repeat for all of the

other element halves.

NOTE: to start the RETAINER, hold the 3/8 x 3" PUSH TUBE in your hand with one end between your

thumb and forefinger. Now center the retainer on this end, “dish” into tube, and hold in place with the

same thumb and forefinger. Grasp the linear loading rod near the end with your other hand and firmly

push the retainer onto the rod.

8. SHORTING BAR PREPARATION

Locate the 16 shorting bar halves. Assemble the shorting bars with 8-32 x 1” screws and locknuts.

Finger tighten the locknuts for now. Next, begin to assemble the phyllistrand tension lines as shown

on the ELEMENT HARDWARE drawing. On each shorting bar, insert one end of each length of

PHILLISTRAN HPTG-1200 CORD into the CENTER hole of the shorting bar. Loop the cord AROUND

THE STRAIN RELIEF and back through the other hole and allow about 2” to protrude. Place a cable

clip here as a “backup” to the final clamping action of the shorting bar halves. Don’t tighten the

hardware at this time.

(OPTIONAL)> On each phyllistrand tension line insert two more 1/8” cable clips and allow them to

slide all the way to the shorting bar for now.

9. SHORTING BAR INSTALLATION

Next, feed each shorting bar onto the pair of linear rod ends and position about them at the

measurement as shown on the DIMENSION SHEET. NOTE the dimension is measured from the

OUTSIDE edge of the LL arm to the OUTSIDE edge of the shorting bar. (USING A BLACK

MPERMANENT MARKING PEN OR EQUIVALENT, MARK THE SPOT ON THE ROD WHERE THE

SHORTING BAR SHOULD BE) Be sure the linear loading lines are centered about the main element.

Once the shorting bars have been correctly set, tighten all of the 8-32 hardware. Cut off the excess

material so that about 1” of rod extends beyond the shorting bar. Start a SHAFT RETAINER onto each

rod tip. Push the retainers up against the shorting bar. Repeat for all of the other element halves.

10. SUSPENSION OF PHYLLISTRAND TENSION LINES

At this point you might want to perform the remaining steps with a friend.

On a flat surface, support the ends of each element tip up so that it is at the same height as the center

section. Next insert the phyllistrand tension lines through their respective turnbuckles, around each

thimble eye, and then finally back through the two cable clips. See the ELEMENT HARDWARE

drawing for an illustration. Now pull on the free end of the phyllistrand until the entire element appears

to be level. (IT MAY BE HELPFUL TO RAISE THE OUTER END OF THE ELEMENT HALF WITH A

4” BLOCK OF WOOD OR BRICK. At this point, secure the tension line by tightening the two 1/8” cable

clips. Repeat this procedure for all the other element halves. The final tensioning of the linear loading

rods is done with the TURNBUCKLES. This can be performed after the elements have been secured

to the boom.

11. BOOM ASSEMBLY

Use the BOOM HARDWARE drawing as a guide to assemble the boom. At this point it will be helpful

to perform the remaining assembly steps with the antenna elevated off the ground (about 3 feet). This

can be accomplished by using sawhorses or something similar. Wipe off the swaged ends of each

boom section and apply a small amount of Penetrox. Insert the swaged ends of the two similar boom

sections into either end of the straight piece. Align all of the holes, install the 1/4-20 x 3-1/2" bolts and

locknuts, and tighten.

40M4LLDD ASSEMBLY MANUAL

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

19. Attach the BOOM TO MAST PLATE at the balance point, using the two large 3” U-bolts, 3/8-16

stainless lockwashers, and nuts. Align plate to vertical and tighten nuts. For they should be attached

in a way to allow the boom to be balanced on your tower / mast.

20. OVERHEAD BOOM SUPPORT SYSTEM.

A. Attach one end of the 5/16" Dacron cord to the rear eyebolt using two turns around the eyebolt and

a series of three half hitches or equivalent knots. Finish with about 6 inches of cord after the knots.

Without cutting the cord, do the same at the front eyebolt. Pull on the knots HARD to SET them.

Seal ends with heat or flame to prevent fraying. Tape the excess 6 inches of cord back to main cord

tightly with black vinyl electricians tape.

B. TEMPORARILY insert a 2 inch U-bolt through the turnbuckle plate and add two nuts so about 1/2

inch of the threads stick out. Insert this assembly through the top set of 2” U-bolt holes in the boom to

mast plate from the boom side and add two more nuts. Open the two turnbuckles up until just a

thread or two from each end shows inside the body of the turnbuckle. Hook the turnbuckles into the

holes at the edge of the turnbuckle plate. Equalize the Dacron cord over the plate and cut it. Take

two wraps of the cord through the eye of the rear turnbuckle, PULL the cord as tight as possible and

make the knots as before. Repeat for the front cord section and turnbuckle. Cut off any excess over

one foot long and again seal and tape back to the main cord.

C. Now DISASSEMBLE the U-bolt from the boom to mast plate. Before installation, if possible, install

a short temporary mast, attach turnbuckle, and let the overhead guy system support the boom

overnight. The Dacron cord DOES NOT STRETCH UNDER THIS LOAD but it's weave will take a SET

and the boom may droop just a bit. If your boom droops again following final adjustments, check your

knots. They may be may be slipping.

D. After final installation of the antenna, the turnbuckle plate, installed loosely with a 2” U-bolt, is raised

up the mast. When the boom is straight the U-bolt is tightened. This should place the turnbuckle plate

4 to 6 feet above the boom. Do the final boom straightening with the turnbuckles and safety wire to

preserve adjustments.

21. Check ALL hardware for tightness. Check ALL element sections, especially tip sections, for

correct placement. Make any final adjustments to linear loading tension.

22. Attach the feedline section to the balun. Route towards the boom to mast plate. Secure at regular

intervals with tape or nylon ties.

23. When mounting this antenna on a tower or mast with other antennas there may be interaction. In

general VHF and/ or UHF antennas mounted for HORIZONTAL POLARITY should be at least 40

inches above or below the antenna. Use good quality 50 Ohm coaxial cable to feed the antenna and

be sure your tower and rotator system can handle the wind loading and vertical weight of this antenna.

THIS COMPLETES ANTENNA ASSEMBLY

M2ANTENNA SYSTEMS, INC.

4402 N. SELLAND AVE.

FRESNO, CA 93722

(559) 432-8873 FAX (559) 432-3059

www.m2inc.com Email: [email protected]

40M4LLDD ASSEMBLY MANUAL

DIRECTOR ELEMENT

FRONT DRIVEN ELEMENT

REAR DRIVEN ELEMENT

ON ALL EIGHT

HALF ELEMENT

SECTIONS

REFLECTOR ELEMENT

108.5 "

3/16" x 111" ROD

3/16" x 114" ROD

108.5 "

3/16" x 111" ROD

3/16" x 114" ROD

1-1/4" X 60"

108.5 "

3/16" x 111" ROD

3/16" x 114" ROD

1-1/4" X 60"

108.5 "

3/16" x 111" ROD

3/16" x 114" ROD

OUTSIDE EDGES

2" U-BOLT,

SADDLE,

5/16-18 NUTS (2)

& LOCKWASHERS (2)

3" x .125" x 156" STR

503.5"

301.5"

3" x .125" x 180" SOE

1-1/2" X 60" SOE

3/8" EYEBOLT

3/8" LOCKWASHER

3/8-16 NUT

470"

506"

202"

1-1/2" X 60" SOE

1" X 1" X 6"

BALUN MTG.

ANGLE BKT.

BOOM TO MAST PLATE

NEAR BALANCE POINT

331"

124"

BOOM TO MAST PLATE

NEAR BALANCE POINT

ELEMENT SPACINGS

177.5"

1.5"

CENTER

3" x .125" x 180" SOE

1-1/2" X 60" SOE

175"

176"

1/4-20 x 3-1/2"

& LOCKNUTS

4 PLACES

1-1/4" X 60"

1-1/2" X 60" SOE

3/8" EYEBOLT

3/8" LOCKWASHER

3/8-16 NUT

36"

1-1/4" X 60"

TURNBUCKLE PLATE

1" X 60"

3/8" TURNBUCKLES (2)

1" X 24" 5/8"

COMPRESSION

CLAMP 1/2" x CHART

EXPOSED

3/4" X 48"

TURNBUCKLE HARDWARE DETAIL

1" X 60"

2" MAST

ON ALL EIGHT

HALF ELEMENT

SECITONS

1" X 24"

1/2" x CHART

EXPOSED

3/4" X 48"

5/8"

COMPRESSION

CLAMP

REFLECTOR 57" 59"

REAR DRIVEN 44.25" 49.75"

FRONT DRIVEN 34.75" 37.5"

DIRECTOR 29.5" 29.25"

LINEAR LOADING (40m) ELEMENT

1/2" TIP DIMENSIONS

1" X 60"

1" X 24" 5/8"

COMPRESSION

CLAMP

1/2" x CHART

EXPOSED

3/4" X 48"

FULL BAND CW / LO FONE

1" X 60"

1" X 24"

1/2" x CHART

EXPOSED

3/4" X 48"

5/8"

COMPRESSION

CLAMP

40M4LLDD DIMENSION SHEET

DRIVEN ELEMENT HARDWARE

FIBERGLASS ROD

1-1/4" X 24"

FIBERGLASS ROD

1-3/8 X 24" SLEEVE

NYLON TIE

1-1/2 X 60" SOE

1/4-20 X 2-3/4" BOLT

& LOCKWASHER

3/4" X 11" SQ. RISER

& WELDED TOP PLATE

HPTG 1200

PLILLISTRAN

(1) CABLE EYE

(3) CABLE CLIPS

8-32 X 1"

SCREW &

LOCKNUT

5 PER SIDE

PHASING LINE

STANDOFF

1/4" TURNBUCKLE

AND JAM NUT

PHASING LINE

CLAMP BLOCK

ELEMENT CLAMP BLOCK

8-32 X 2" SCREW &

1/2" X 3" X 6" (SIZE #6)

1/4-20 X 2-1/2"

BOLT AND LOCKNUT

1/4-20 X 3-1/4"

BOLT & LOCKNUT

1/2" X 1" X 4"

LOCKNUT

INSULATOR

POLY DISC

BOOM, 3"O.D.

X .125 WALL

CRADLE

1/4-20 X 2"

BOLT & LOCKNUT

SHORTING BAR PAIRS

1/4-20 X 1" FLAT HEAD

BOLT & LOCKNUT

POST

PHASING LINE

CLAMP CAP

3/16" LINEAR

VERTICAL SUPPORT

3/4" X 3/4"

LOADING ROD

1/2 x 1 x 4" CRADLE (2)

1/4" STAINLESS

TURNBUCKLE (2)

1-1/2 X 60" SOE

1-1/4" X 24"

ALUM. ROD

1-3/8 X 24" SLEEVE

3/16" LINEAR

LOADING ROD (2)

1/4-20 X 2-3/4"

BOLT (4)

8-32 x 1"

SCREW &

LOCKNUT (5)

CABLE EYE

WIRE NUTS (2)

BOOM, 3"O.D.

X .125 WALL

1/4-20 X 3-1/4"

BOLT & LOCKNUT

ELEMENT CLAMP BLOCK

1/2" X 3" X 6" (SIZE #6)

BOLT AND LOCKNUT

1/4-20 X 2-1/2"

ELEMENT

HARDWARE

3/4" X 3/4" X .125" WALL

VERTICAL SUPPORT

POST

1/4-20 SS

JAM NUTS

1/4-20 X 2"

BOLT & LOCKNUT

SHORTING BAR

AND STRAIN

40M4LLDD ASSEMBLY DETAIL

LINEAR LOADING

SHORTING BAR HALVES

(2) PER ELEMENT HALF

8-32 X 1-1/2"

SCREW &

LOCKNUT

BOOM HARDWARE ARRANGEMENT

BECAUSE OF THE BEND RADIUS

AND THE REQUIRED SMALL HOLES

IN THE PHASING LINE SUPPORT

INSULATORS, THE USER IS REQUIRED

TO BEND THE TWO PHASING LINES

AT THE TIME OF ASSEMBLY.

BOLTS & LOCKNUTS

4 PLCS PER ELEMENT

1/4-20 X 2-1/2"

USE 1/4-20 X 3-1/2"

BOLTS & LOCKNUTS

LINEAR LOADING SUPPORT POST

WITH WELDED TOP PLATE

3/4 X 3/4 X 11"

3" X .125 X 180" SOE

3/8 X 4"

FORGED

EYEBOLT (2)

2 PLCS. PER ELEMENT

BOLTS & LOCKNUTS

1/4-20 X 3-1/4"

3" X .125 X 156"

TOP VIEW - LINEAR LOADING/ELEMENT CLAMP HDWE

KEEPERS, OR

SHAFT RETAINERS

1 ON EACH END

1/8" CABLE CLIPS

3 PER EACH

ELEMENT HALF

1:1 BALUN

1-3/8" x 24"

1-1/2"x 60"

ALUMINUM=DRIVEN EL.

FIBERGLASS=REF& DIR

1-1/4" x 24" ROD:

1/4-20 X 2" BOLT

AND LOCKNUT (8)

1-1/4" x 60

8-32 X 1-3/4"

SCREW &

LOCKNUT

ATTACH BALUN LEADS TO

PHASE LINE CLAMP CAPS

1/4-20 X 1" FLAT HEAD

BOLT AND LOCKNUT (8)

BALUN MOUNTING

'L' PLATE, 6" (1)

PHASING LINES

3/16" ALUM. ROD (2)

PHASING LINE

INSULATORS (5)

& LARGE NYLON TIE

2-1/2" U-BOLT & SADDLE (1)

5/16-18" NUTS (2)

5/16 LOCKWASHERS (2)

1:1 BALUN AREA TOP VIEW

5.0

4.0"

(2)3/16" SHAFT

RETAINERS

7/8" X 9"

FIBERGLASS

ROD

3" X .125 X 180" SOE

5/16" DACRON CABLE,

USE 1/4-20 X 3-1/2"

BOLTS & LOCKNUTS

3/8" TURNBUCKLES (2)

8 X 8 X 1/4 BOOM TO MAST PLATE

8-32 X 1" SCREWS &

LOCKNUTS (5)

LINEAR LOADING HARDWARE DETAIL

8-32 X 1-1/2"

SCREW AND LOCKNUT

1 X 6"

BLACK ABS

STABILIZER BAR

(BUTT AGAINST

1-1/4" TUBE)

STRAIN RELIEF

8-32 X 1/4"

SET SCREW

8-32 X 1-1/4"

SCREW &

LOCKNUT

LINEAR LOADING

ARM

8-32 X 1"

SCREW AND LOCKNUT

SUPPORT ARM FOR

STABILIZER BAR

1/2 X CHART

5/8"

COMPRESSION

CLAMP

ELEMENT ASSEMBLY

7/8"x 9" FIBRGLASS ROD

1"x24"

1"x 60"

8-32 X 1"

SCREW &

LOCKNUT

8-32 X 1-1/4"

SCREW &

LOCKNUT

3/4"x48"

1/4-20 X 2-3/4"

BOLTS

MATERIAL: ( 2) 3/16" X 132"

6061-T6 ROD

MAKE TWO IDENTICAL PARTS

40M4LLDD PHASING LINE

3.75

THIS 10" STRAIGHT SECTION

ALLOWS CLEARANCE FOR

BALUN MOUNTING.

5.0

10.0"

40M4LLDD ASSEMBLY DETAIL

GENERIC COMPRESSION CLAMP DETAIL

NOTE:

Generic layout to show

how compression clamps work.

Your antenna may have one or the other

or may even have both compression

clamp sizes.

Table des matières

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