M2 Antenna Systems 10M4DX Bedienungsanleitung

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

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

07/31/09

Rev.01

Model ........................................ 10M4DX

Frequency Range...................... 28.0 To 28.8 MHz

*Gain, (FS) / Over gnd............... 10.1dBi / 15.7dBi @35’

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

Beamwidth ............................... E=53° / H=68°

Feed type................................... Hair pin match

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

Maximum VSWR ....................... 1.2:1

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

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

Boom Length / Dia..................... 24’ / 2” x .065 Wall

Element Length / Dia. ................ 18.5’ / 1” To 1/2”

Turning Radius: ......................... 14’ 8”

Stacking Distance ...................... 25’ To 31’

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

Wind area / Survival .................. 3.5 Sq. Ft. / 100 MPH

Weight / Ship Wt. ....................... 38 Lbs. / 41 Lbs.

M2 Antenna Systems, Inc.

Model No: 10M4DX

FEATURES:

The 10M4DX was designed for high performance while keeping weight, wind area and costs low. Using computer

optimization techniques, we have squeezed for excellent performance on both the CW and phone. The 10M4DX is a

great antenna to stack with more 10M4DX Yagis or with other HF antennas. Mechanically, CNC machined aluminum

(6061-T6) ring clamps ground the elements to the boom and make assembly a snap. A hairpin type match couples the 3

kW 1: balun to the feed line. The antenna is completely DC grounded. Great effort has been put into making sure this an-

tenna stays in the air for years to come while providing enjoyment and satisfaction along the way.

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd / FS = Free Space

Note: A cup of zinc paste (PENETROX, NOALOX, or equivalent) has been provided to enhance the

quality of all the electrical joints in this antenna. Apply a thin coat wherever two pieces of aluminum

come in contact PARTICULARLY IN THE .DRIVEN ELEMENT MATCHING ASSEMBLY.

BOOM SETUP AND ASSEMBLY

1. Refer to the Dimension Sheet. Note the different boom sections and the approximate position of

each element. LAY OUT the boom sections in order of assembly but do not couple together yet. Slide

the appropriate size and number of RING CLAMPS into their approximate positions on ALL boom

sections. For example, the rear boom section, 2” x 95”, has two 2” ring clamps. Spread the ring

clamp fingers with a flatblade screwdriver to ease movement on boom. Loosely add a 1/4-20 x 1” bolt

and locknut to fingers of all clamps. NOW GO AHEAD AND ASSEMBLE THE BOOM. Add the two

EYEBOLTS and tighten in place. Then POSITION each ring clamp accurately starting with the rear

ring clamp about 1-1/2” in from the end of the boom. Final element alignment can be done once the

antenna is fully assembled.

DRIVEN ELEMENT ASSEMBLY

2. Locate the two 1” x 12” swaged tube sections. insert a 3/4 x 36” section into the swaged end and

add the 8-32 x 1-1/4” screws and locknuts. SPACE PERMITTING, add the correct set of 1/2” tips and

secure with 5/8” compression clamps. Locate the 7/8 x 15” center fiberglass section and slip the two

white polyethylene rings on the rod centering them between the outer and inner holes on each side.

Slide the two half element sections over the 7/8 x 15” center fiberglass rod insulator and add the 1/4-

20 x 2” bolts and locknuts loosely through the outer holes in the rod.

Locate the balun mounting plate and drop two 1/4-20 x 2” bolts through the smaller holes in the plate

and then down through the inner holes in the rod. Set this assembly onto the driven element ring

clamp. Add the 1/4" locknuts and tighten. Mount the 1:1 balun to the plate using one 2-1/2” U-bolt and

saddle. Orient the balun so the drain/vent hole is down and tighten the U-bolt gently.

3. Locate the 1/2” wide balun straps and connect one to each side of the balun finger tight. Now

remove the loose bolts holding the element halves to the rod and insert the bolts up from the bottom,

through the rod and element butt. Place two clamp blocks on each stud. Place the balun strap on the

remaining stud and add the nuts loosely.

4. Locate the band clamp and insert a 1/4-20 x 2” bolt through the hole from the inside. Add the 3/8” x

1” spacer tube to the bolt and set the shorting bar on the spacer. Add a locknut and finger tighten.

Slide the long, straight ends of the 3/8” hairpin tubes through the shorting bar and add the 1/4-20 x

1/4” set screws to each end of the shorting bar but don’t tighten yet. Set the open band clamp on the

boom just in front of the driven element and feed the hairpin tubes into the clamp block openings until

they are flush with the back edges. Align the tubes and begin to tighten up the clamp block bolts.

5. Adjust the shorting bar position,(see dimension sheet) align and tighten the set screws. Now

tighten the band clamp. RECHECK and tighten all the hairpin match assembly and driven element

assembly hardware, including the balun studs.

PARASITIC ELEMENT ASSEMBLY

6. Assemble the other three pairs of elements. Insert two 1/4-20 x 2” bolts down through the 1”

section and set each on the correct ring clamp on the boom. Add the 1/4-20 locking nuts and tighten.

OVERHEAD GUY ASSEMBLY

7. If possible, attach the feedline to the balun and route it forward to about 12 feet from the rear of the

boom. Seal the connector with black tape, coax seal or equivalent. Now pick up the antenna and

mark the balance point. It should be just under 12 feet from the rear of the boom Center the

BOOM TO MAST PLATE here and secure to the boom with two 2”- U-bolts, cradles, stainless

lockwashers and nuts. 2” U-bolts are supplied for attaching the antenna to the mast.

10M4DX ASSEMBLY MANUAL

8. To prepare the overhead guy system, begin by temporarily installing a 2” U-bolt through the

TURNBUCKLE PLATE and into the top set of 2” U-bolt holes on the boom to mast plate. Add a couple

of 5/16” nuts to hold it in place. UNSCREW the turnbuckle eyes / hooks until only a thread or two

shows inside the turnbuckle body and hook them to turnbuckle plate.

9. Uncoil DACRON CORD. Secure one end to rear eyebolt, taking two turns through the eyebolt,

then adding three TIGHT half-hitches. Pull hard on cord to set the knots. Repeat for the front eyebolt.

Seal cord ends with heat (lighter, propane torch, etc) and tape to main length.

10. Equalize cord length at turnbuckle plate and cut. Put two turns trough rear turnbuckle eye. Pull the

Dacron rope as tight as possible and add three TIGHT half-hitches. Repeat for front cord section. Seal

and tape cord ends. When finished the overhead guys should be taught and laying parallel with the

boom. Now remove the turnbuckle plate from the boom to mast plate and lift it temporarily to note the

approximate height at which the boom becomes level. ( usually about 3 feet).

11. During final installation on the tower / mast, secure the turnbuckle plate at the appropriate height

with the 2” U-bolt. Then lean or pull on the cords to increase the tension and help the knots take their

final “set.” Make sure the knots are not slipping. When the guy system has taken a “set”, loosen the 2”

U-bolt and adjust turnbuckle plate height until boom is straight and level. Finer adjustments can be

made with the turnbuckles at any time, if necessary.

12. This completes the ASSEMBLY. REMEMBER to support the feedline at the antenna boom and on

the mast. Leave an adequate feedline loop for rotation around the tower. When stacking this antenna

with other H.F. models, maintain at least 8’ separation; more if practical. Mount horizontally polarized

VHF and UHF antennas at least 40” above or below this antenna to minimize interaction.

Carefully designed and manufactured by:

M2ANTENNA SYSTEMS, INC.

4402 N. SELLAND AVE.

FRESNO, CA 93722

(559) 432-8873 FAX: 432-3059

www.m2inc.com Email: [email protected]

10M4DX ASSEMBLY MANUAL

10M4DX DIMENSION SHEET

D.E. & PARASITIC ELEMENT DETAIL

GENERIC COMPRESSION CLAMP DETAIL

DESCRIPTION QTY

BOOM SECTION #1, 2" X .065 X 95” SOE .............................................. 1

BOOM SECTION #2 & 3, 2" X .065 X 95” SOE........................................ 2

BOOM SECTION #4, 2” X .065 X 19” STRAIGHT ................................... 1

ELEMENT SECTION, 1” X 24 SBE FOR 2” RING CLAMP...................... 3

ELEMENT SECTION 1” X .058 X 12” SOE .............................................. 2

ELEMENT SECTION, 3/4” X .049 X 36” SOE .......................................... 8

ELEMENT TIP SECTION 1/2” X .049 X SEE DIMENSION SHEET ........ 8

FIBERGLASS INSULATOR 7/8” X 15” ROD............................................ 1

BALUN, 1:1 3-30 MHZ ............................................................................. 1

STRAP, BALUN, FOR 10M4DX 1/2 X .050 X 4” ALUM. .......................... 2

HAIRPIN TUBE 3/8 X 24” ......................................................................... 2

RING CLAMP, 2”....................................................................................... 4

BOOM TO MAST PLATE, 4” X 6” X 3/16””(2 X 2 U-BOLTS) ................... 1

TURNBUCKLE PLATE, 3/16 X 2 X 4” ...................................................... 1

DACRON CORD, 5/16”, 30’...................................................................... 1

EYEBOLTS, 5/16” X 4” ............................................................................. 2

TURNBUCKLES, 5/16”, HOOK & EYE..................................................... 2

U-BOLT AND CRADLE, 2 INCH............................................................... 5

COMPRESSION CLAMP, 5/8” ................................................................ 8

ASSEMBLY INSTRUCTIONS................................................................... 1

HARDWARE BAG

NUT, 5/16-18 SS..................................................................................... 10

LOCKWASHER, SPLIT RING 5/16" ....................................................... 10

BOLT, 1/4-20 X 2-1/2" SS......................................................................... 6

BOLT, 1/4-20 X 2” SS ............................................................................... 8

BOLT, 1/4-20 X 1" SS ............................................................................... 4

NUT, 1/4-20 LOCKING, SS .................................................................... 18

SCREW, 8-32 X 1-1/4" SS...................................................................... 16

SCREW, 8-32 X 1/2" SS ........................................................................... 8

NUT, 8-32, SS........................................................................................... 8

NUT, 8-32 LOCKING, SS........................................................................ 16

NYLON TIE, LARGE BLACK, 11”............................................................. 2

ZINC PASTE, 1 OZ. CUP ......................................................................... 1

HAIRPIN KIT BAG INCLUDING:

PLATE, BALUN MTG. 1/8 X 2 X 4” ALUM........................................... 1

U-BOLT, 2-1/2” AND SADDLE ............................................................ 1

CLAMP BLOCK, FOR 3/8”................................................................... 4

SHORTING BAR, HAIRPIN, 1/2 X 1/2 X 5 .......................................... 1

POLY DISC, 7/8” HOLE ....................................................................... 2

BAND CLAMP, 1-1/2” TO 2-1/2” #32, MOD W/1/4” HOLE.................. 1

SPACER, 3/8 X 1” ALUM..................................................................... 1

NUT, 5/16-18 SS.................................................................................. 2

LOCKWASHER, 5/16” SPLIT RING, SS ............................................. 2

BOLT, 1/4-20 X 2” SS .......................................................................... 3

NUT, 1/4-20 LOCKING, SS ................................................................. 3

SET SCREW, 1/4-20 X 1/4” SS ........................................................... 2

ALLEN WRENCH, 1/8" ........................................................................ 1

M2ANTENNA SYSTEMS, INC.

4402 N. SELLAND AVE.

FRESNO, CA 93722

(559) 432-8873 FAX: 432-3059

www.m2inc.com Email: [email protected]

10M4DX PARTS & HARDWARE

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