M2 Antenna 11M7 Manual

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M2 Antenna 11M7 Manual | Manualzz

M2 Antenna Systems, Inc.

Model No: 11M7

SPECIFICATIONS:

Model ......................................... 11M7

Frequency Range ....................... 27.10 To 27.80 MHz

*Gain .......................................... 12.40 dBi

Front to back .............................. 26 dB Typical

Beamwidth ............................... E=42° H=48°

Feed type ................................... Direct feed

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

Maximum VSWR ........................ 1.3:1 Typical

Input Connector .......................... SO-239

Power Handling .......................... 1.5 kW

Boom Length / Dia ...................... 46’ 3” / 2-1/2” & 2”

Maximum Element Length .......... 18.75’

Turning Radius: .......................... 18’ 6”

Stacking Distance ....................... 35’ Vertical

Mast Size .................................... 2” Nom.

Wind area / Survival ................... 6 Sq. Ft. / 100 MPH

Weight / Ship Wt. ........................ 52 Lbs. / 58 Lbs.

*Subtract 2.14 from dBi for dBd

FEATURES:

The 11M7 is a great performer for it’s size. The computer optimized design allows full band coverage with good gain and front to back. Mechanically, CNC machined aluminum (6061-T6) ring clamps ground the elements to the boom and make assembly a snap. A Hairpin style driven element can handle up to 1.5 kW.

The antenna is completely DC grounded. Great effort has been put into making sure this antenna stays in the air for years to come while providing enjoyment and satisfaction along the way.

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

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

©2015 M2 Antenna Systems Incorporated

02/26/15

Rev.02

11M7 ASSEMBLY MANUAL

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 Boom Layout & 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 123”, has three 2” ring clamps. Spread the ring clamp fingers with a flat blade screwdriver to ease movement on boom.

Loosely add a 1/4-20 x 1” bolt and locknut to fingers of all clamps. After all 7 ring clamps have been put into their relative positions, 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 3/8” in from the end of the boom. Final element alignment can be done once the antenna is fully assembled.

DRIVEN ELEMENT ASSEMBLY

2. Refer to Driven Element Detail Sheet. Locate the two 1” x 12” swaged tube sections. Insert a 3/4 x

45” 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 (See compression clamp & tip assembly detail sheet). Locate the 7/8 x 14-3/4” 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 14-3/4” 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" lockwashers & nuts and tighten. Mount the 1:1 balun to the plate using one 2-1/2” U-bolt and cradle.

Caution tighten balun 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 tightnen.

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 behind 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 & driven elemebt detail 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 leads.

PARASITIC ELEMENT ASSEMBLY

6. Refer to Parasitic Element Detail. Assemble the other six pairs of elements and set each on the correct ring clamp on the boom. Note: Directors 2 and 3 mount to 2-1/2” ring clamps.

11M7 ASSEMBLY MANUAL

OVERHEAD GUY ASSEMBLY

7. If possible, attach the feedline to the balun and route it forward to about 18 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. Refer to Dimension Sheet for Boom to Mast location. Secure boom to mast plate to the boom with two 2-1/2" U-bolts, cradles, stainless lockwashers and nuts. 2” U-bolts are supplied for attaching the antenna to the mast. Refer to Boom to Mast Plate Detail Sheet.

10. Refer to Overhead Support Detail Sheet. 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.

11. 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.

12. 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).

14. 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.

15. 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.

M

2

ANTENNA SYSTEMS, INC.

4402 N. SELLAND AVE.

FRESNO, CA 93722

(559) 432-8873 FAX: 432-3059 www.m2inc.com Email: [email protected]

11M7 BOOM LAYOUT

11M7 DIMENSION SHEET

11M7 DRIVEN ELEMENT DETAIL

BALUN & PARASITIC ELEMENT DETAIL

BALUN DETAIL

PARASITIC ELEMENT DETAIL

11M7 BOOM TO MAST PLATE DETAIL

11M7 OVERHEAD SUPPORT DETAIL

GENERIC COMPRESSION CLAMP DETAIL

11M7 PARTS & HARDWARE

DESCRIPTION ......................................................................................... QTY

BOOM SECTION #1: 2” X .065 X 123” ................................................... 1

BOOM SECTION #2: 2-1/2” X .065 X 120” SOE ...................................... 1

BOOM SECTION #3: 2-1/2” X .065 X 120” SBE ...................................... 1

BOOM SECTION #4: 2” X .065 X 120” SOE ............................................ 1

BOOM SECTION #5: 2” X .065 X 90” ...................................................... 1

DRIVEN ELEMENT CENTER: 1” X .058 X 12” SOE................................ 2

DRIVEN ELEMENT SECTION #1: 3/4” X .058 X 45” SOE ...................... 2

ELEMENT SECTION #1: 3/4” X .058 X 60” SOE ..................................... 12

ELEMENT SLEEVE CENTER: 7/8” X .058 X 30” (M2AEP0015) ............. 4

ELEMENT SLEEVE CENTER: 7/8” X .058 X 30” (M2AEP0016) ............. 2

ELEMENT TIPS: 1/2” X .049 X SEE CHART ........................................... 14

HAIRPIN TUBE: 3/8” X 25” ...................................................................... 2

HAIRPIN SPACER: 3/8” X 1” (M2ARS0010) ............................................ 1

FIBERGLASS CENTER: 7/8” X 14-3/4” (M2AFG0030) ............................ 1

RING CLAMP, 2” (M2AEC0200) .............................................................. 5

RING CLAMP, 2-1/2” (M2AEC0220) ........................................................ 2

ELEMENT CLAMP BLOCK: 1/4” X 1” X 1-1/4” (M2AMC0261) ................ 4

COMPRESSION CLAMP, 5/8” (M2AMC0145) ......................................... 14

BOOM TO MAST PLATE: 6” X 8” X 1/4” (M2APT0010) ........................... 1

BALUN PLATE: 2” X 4” X 1/8” (M2APT0018) .......................................... 1

POLY DISC INSULATOR: 2 OD X 7/8 ID (M2ADI0040) .......................... 2

BAND CLAMP WITH HOLE, 2” TO 2-1/2” ................................................ 1

HF SHORTING BAR, 1/2” X 1/2” X 5” (M2ASB0262)............................... 1

BALUN ASSSEMBLY: 1:1 W/SO239 (FGBL0100) .................................. 1

BALUN STRAP, 1/2” X .050 X 4” ............................................................. 2

TURNBUCKLE PLATE, 2” X .188 X 5” (M2APT0113) ............................. 1

NYLON TIE, LARGE BLACK, 11” ............................................................ 6

PENETROX / ZINC PASTE CUP ............................................................. 1

ASSEMBLY MANUAL .............................................................................. 1

HARDWARE:

TURNBUCKLE, 3/8”, HOOK & EYE ......................................................... 2

DACRON ROPE, 5/16” X 38’ ................................................................... 1

U-BOLT AND CRADLE, 2-1/2” ................................................................. 3

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

EYEBOLT, 5/16-18 X 4”, ZINC ................................................................. 2

LOCKWASHER, 5/16, SS ........................................................................ 18

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

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

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

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

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

BOLT, 1/4-20 X 2”, SS ............................................................................. 5

BOLT, 1/4-20 X 1-3/4”, SS ....................................................................... 12

BOLT, 1/4-20 X 1”, SS ............................................................................. 7

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

LOCKWASHERS, 1/4, SS ........................................................................ 3

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

LOCKNUT, 1/4-20, SS ............................................................................. 29

SCREW, 8-32 X 1-1/4”, SS ...................................................................... 4

SCREW, 8-32 X 1/2”, SS ......................................................................... 14

NUT, 8-32, SS .......................................................................................... 14

LOCKNUT, 8-32, SS ................................................................................ 4

ALLEN HEAD WRENCH, 1/8” .................................................................. 1

M

2

ANTENNA SYSTEMS, INC.

4402 N. SELLAND AVE.

FRESNO, CA 93722

(559) 432-8873 FAX: 432-3059 www.m2inc.com Email: [email protected]

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