M2 Antenna Systems 40M2C Manual de usuario

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

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

Rev.01

Model ........................................ 40M2C

Frequency Range ...................... 7.0-7.3 MHz 3 Seg

Gain ........................................... 11 dBi @ 70’ / 6.1 FS

Front to back .............................. 25 dB @ 70 ft / 15 FS

Beamwidth ............................... E=74°

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

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

Maximum VSWR ....................... See Curve

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

Power Handling.......................... 3 Kw PEP, Higher avl.

Boom Length / Dia ..................... 19.5’ / 3.0 x .065 Wall

Element Length / Dia. ................ 50 Ft. / 1-1/2” To 1/2”

Turning Radius:.......................... 27 Ft.

Stacking Distance ...................... 70 Ft.

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

Wind area / Survival................... 4.85 Sq. Ft. / 100 MPH

Weight / Ship Wt. ....................... 76 Lbs. / Lbs.

M2 Antenna Systems, Inc.

Model No: 40M2C

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

FEATURES:

The 40M2C is the latest addition to our already exceptional 40 meter Yagi lineup. Using all the latest design and manufacturing tools,

including 3D printed coil forms. Our coil loaded antennas now make it difficult to choose a full size equivalent. Mounting this Yagi at 70

feet creates incredibly clean pattern with unique front to rear and above performance.

Our new covered coil design features 3/16" diameter copper clad soft drawn aluminum that has great power handling and high efficien-

cy (Q over 900) combined with low weight. We use 3D printing for precision coil forms. The coils are located at the optimum place in

each element half. The location of the coil is important for best performance and this careful placement also breaks the element into

small electrical lengths that appear shorter than 20 meter elements. This means there is little or no interaction with any 20 meter Yagi

on the same mast OR on the same boom. Our new DUAL BAND "CYCLE BUSTER " takes full advantage of this unique feature.

Mechanically, the coil loading offers a cleaner look with less wind area and fewer connections. Wind and ice loading are reduced as

well. We continue to offer the same unbreakable element mounting and OVER HEAD element support. The rugged, time tested ele-

ments and 3 kW 1:1 Balun are part of the package. All Hardware is stainless steel except for the Galvanized U-bolts and saddles.

(Stainless U-bolts tend to Gall and freeze up) and used in our other 40M Yagis.

40M2C ANTENNA OVERVIEW

BEFORE YOU BEGIN: Look over all the DRAWINGS to get familiar with the various parts and assem-

blies in the system. Tools handy for assembly process: screwdriver, 11/32”, 7/16”, 1/2”, 9/16” and 5/8”

spin-tites, end wrenches and/or sockets, and a measuring tape.

Note:

All installations are unique in some way, which means it's OK to preassemble certain hardware, or

rearrange the assembly process to meet specific site requirements. A quick review of the assembly

drawings should help firm up the appropriate strategy. Please remember to double-check all hard-

ware for tightness BEFORE it becomes inaccessible.

One container of zinc paste (Penetrox, Noalox, or equiv.) has been provided to enhance and

maintain the quality of all mechanical and electrical junctions on this system. Apply a thin coat

wherever two pieces of aluminum come in contact or any other electrical connections are made.

It is also useful on screws and bolt threads as an ANTI SEIZE compound.

DRIVEN

ELEMENT

REFLECTOR

40M ELEMENT HALF OVERVIEW

ELEMENT MOUNTING

PLATE

(M2AEC0040)

ELEMENT CLAMP

(M2AMC0136)

ELEMENT SECTION #1

(M2AEP40MC-1)

ELEMENT SECTION #4

(M2AEP40MC-4)

ELEMENT SECTION

(M2AEP40MC-3)

ELEMENT SECTION #5

(M2AEP40MC-5)

ELEMENT TIP

(SAEL40M2C)

LENGTH VARIES

DEPENDING

ON ELEMENT

2 (QTY) SCREW,

8-32 X 1”

& LOCK NUT

ELEMENT SECTION #6

(M2AEP40MC-6)

COIL ASSEMBLY

2 (QTY) SCREW,

8-32 X 1-1/2”

& LOCK NUT

2 (QTY) SCREW,

8-32 X 1-3/4”

& LOCK NUT

BOLT,

1/4-20 X 2”

& LOCK NUT

ELEMENT ELEMENT

OVERHAED SUPPORT

(M2APL0212)

40M COIL OVERVIEW

40M COIL

(M2ACA1550)

COIL SUPPORT

(M2ACA1554)

COIL INSULATOR

(M2AFG0050)

COIL POST

(M2ACA1551)

(QTY 2)

ELEMENT SECTION #6

(M2AEP40MC-6)

COIL END CAP

(M2ACA1552)

(QTY 2)

ELEMENT SECTION #4

(M2AEP40MC-4)

NOTE: COVER REMOVED FOR ILLUSTRATION PURPOSES.

BOOM ELEMENT TIP

40M COIL ASSEMBLY

INSTRUCTIONS

STEP 1:

The coil comes wound tight with 16 total turns from the factory, When final

assembled, you will end with 15.5 total turns. The excess material will be

trimmed off after the coil is in its final position. Using a permanent marker, draw a

straight line from one end of the coil to the other. This will help later to determine if

your coil has grown in diameter during assembly. After final positioning of the coil,

no more 3/4 of an inch of line tilt is allowed. A larger coil will cause the inductance to

change which can cause your antenna to be off frequency.

STEP 2:

The COIL is wound tight at the factory to prevent damage during shipping. Use the

COIL SPREADING TOOL provided, and carefully insert it into the first turn of the

COIL. Now gently push or roll the tool through all 16 turns of the COIL. Now the

COIL is nearly in its final shape and is ready to be threaded onto the COIL SUP-

PORT. Note the reference line drawn earlier, it will have a slight tilt after spreading.

STEP 3:

On one end, use pliers to gently straighten the last 1/2” of the COIL and file

off any burrs.

STEP 4:

Begin threading the COIL onto one end of the COIL SUPPORT. BE CAREFUL to not deform the COIL during this

process. The COIL should thread smoothly. Continue until about 5-1/2 turns are past the COIL SUPPORT or close to the

center. Exact centering is not important. Again, note your reference line.

NOTE: PENETROX PASTE FOR LUBRICATING SCREW THREADS AND TUBING JOINTS HAS BEEN SUPPLIED. USE A VERY SMALL AMOUNT ON

EACH SCREW THREAD AND UNDER THE COIL POSTS DURING THE NEXT OPERATION.

STEP 5:

Insert the COIL INSULATOR (M2AFG0050) into your COIL SUPPORT (M2ACA1554). Rotate the COIL and the

COIL SUPPORT so the leading end of the COIL goes over and just past the inner hole in the COIL INSULATOR. Now slide

on one COIL POST on to one end of the COIL so it is right over the first hole. Next, carefully slide on the ELEMENT SEC-

TION #6 (M2AEP40MC-6) and align it so both holes in the tube match the two holes in the COIL INSULATOR.

STEP 6:

Insert hardware through the ELEMENT SECTION #6 and the COIL INSULATOR and begin threading it into the

COIL POST. Tighten hardware. Thread the SET SCREW into the top of the COIL POST and with about 1/2” of wire protrud-

ing past the COIL POST, tighten the SET SCREW gently. Use supplied ALLEN WRENCH to tighten the SET SCREW.

1/2” TO 3/4”

TILT

40M COIL ASSEMBLY

INSTRUCTIONS

STEP 7:

The second COIL POST is mounted on the OP-

POSITE SIDE of the COIL INSULATOR so 15 1/2 turns of

the COIL are used. The extra 1/2 turn COIL should pass

over the COIL INSULATOR hole. Slide on the second

COIL POST and align it over the hole. Slide on ELEMENT

SECTION #4 (M2AEP40MC-4) and fasten the COIL POST

to the tubing assembling using the supplied hardware. Use

you reference line and adjust the coil so the line has no

more tilt the 3/4”. There should be about 1.5 to 2” of extra

coil material past the post after adjusting that will be

trimmed.

STEP 8:

Insert the SET SCREW into the COIL POST and

tighten gently. Adjust the COIL and COIL SUPPORT loca-

tion for equally spaced turns. The distance between each

turn should be the same as the COIL wire diameter. Once

the COIL is straight and aligned, tighten the final SET

SCREW securely. Trim off excess coil material leaving 1/4

to 1/2” past the COIL POSTS.

STEP 9:

Slide COIL COVER and COIL END CAPS onto COIL ASSEMBLY. Secure COIL END CAPS into position by securing

hardware through TUBE ASSEMBLIES on both ends of the COIL ASSEMBLY. Slide ELEMENT OVERHEAD SUPPORT onto

ELEMENT SECTION until it reaches the head of the screw holding on the COIL COVER. Clamp ELEMENT OVERHEAD SUP-

PORT in place with screw and locknut.

STEP 10:

Assemble all the remaining COIL ASSEMBLIES by repeating steps 1-9. Set COIL ASSEMBLIES aside for future use.

COIL (15.5 TURNS)

(M2ACA1550)

COIL INSULATOR

(M2AFG0050)

COIL SUPPORT

(M2ACA1554)

ELEMENT SEC-

TION #4

ELEMENT SECTION #6

(M2AEP40MC-6))

COIL POST

(M2ACA1551)

SCREW, 8-32 X 1-1/4”

SET SCREW, 1/4-20 X 1/4”

STEP 11:

At this point it will be helpful to perform the remaining

assembly steps with the BOOM ASSEMBLY elevated off the

ground (about 3 feet). This can be accomplished by using

sawhorses or something similar. Wipe off the swedged ends of

each BOOM SECTION and apply a small amount of PENTROX.

Refer to the drawing below and assemble BOOM SECTIONS as

shown. Insert hardware and tighten.

SCREW, 1/4-20 X 3-1/2”

LOCKNUT, 1/4-20

BOOM

SECTION

BOOM

SECTION

40M2C BOOM ASSEMBLY

INSTRUCTIONS

BOOM SECTION #2

(M2ABS40M2-2)

(QTY 1)

REAR OF

BOOM

FRONT OF

BOOM

BOOM SECTION #3

(M2ABS40M2-3)

(QTY 1)

BOOM SECTION #1

(M2ABS40M2-1)

(QTY 1)

STEP 12:

Assemble the ELEMENT MOUNT

assemblies for the reflector and front director

element. Refer to the assembly drawing to aid in

assembly. Be sure to center the ELEMENT

CENTER SPLICE and the holes are in the

vertical position.

STEP 13:

Assemble the DRIVEN ELEMENT

MOUNT assembly for the DRIVEN ELEMENT.

Refer to the assembly drawing to aid in assembly.

Be sure to center the INSULATOR and the hole

are in the vertical position. The DISC

INSULATORS are a press fit. Heating them with

a heat gun or hot water will help in assembly.

NOTE: For the final assembly on all the ele-

ments, it is best to perform the next steps on the

ground or long flat surface. This will aid during

40M2C ELEMENT MOUNT ASSEMBLY

INSTRUCTIONS

BOLT, 1/4-20 X 2-3/4”

LOCKNUT, 1/4-20

(QTY 4)

ELEMENT MOUNTING

PLATE

(M2AEC0040)

(QTY 2)

ELEMENT CENTER SPLICE

(M2ASR0050)

ELEMENT MOUNT ASSEMBLY

REFECTOR OR DIRECTOR

BOLT, 1/4-20 X 2-1/2”

LOCKNUT, 1/4-20

(QTY 4)

CRADLE 3”

(M2AMC0136)

(QTY 2)

VERTICAL RISER

ASSEMBLY

(SAVR0010)

BOLT, 1/4-20 X 3-1/2”

AND LOCKNUT

(QTY 2)

CRADLE 3”

(M2AMC0136)

(QTY 2)

ELEMENT MOUNTING

PLATE

(M2AEC0040)

(QTY 2)

BOLT, 1/4-20 X 2-1/2”

LOCKNUT, 1/4-20

(QTY 4)

INSULATOR

(M2AFG0034)

VERTICAL RISER

ASSEMBLY

(SAVR0010)

BALUN BRACKET

(M2APT0016)

DISC INSULATOR

(M2ADI0020)

(QTY 2)

ELEMENT MOUNT ASSEMBLY

DRIVEN ELEMENT

BOLT, 1/4-20 X 2-3/4”

LOCKNUT, 1/4-20

(QTY 4)

BOLT, 1/4-20 X 3-1/2”

AND LOCKNUT

(QTY 2)

final adjustment of the ELEMENT OVER HEAD SUPPORT. The ELEMENT HALVES are symmetrical on both sides. Do

each of the following steps on both sides of the ELEMENT.

STEP 14:

Slide ELEMENT SECTION #2 onto ELEMENT CENTER SPLICE or INSULATOR.

STEP 15:

Slide ELEMENT SECTION #1 onto ELEMENT SECTION #2. Insert hardware and tighten locknut. Attach VERTI-

CAL RISER ASSEMBLY. For the driven element you need to add (4) CLAMP BLK, 3/8 (HAIRPIN) (M2AMC0261) and

hardware. See drawings for hardware call out for the different elements.

STEP 16:

Insert ELEMENT SECTION #3 into the end of ELEMENT SECTION #1. Insert and tighten hardware.

STEP 17:

Insert the ELEMENT SECTION #6 of the COIL ASSEMBLY previous assembled in STEPS 1-10 into ELEMENT

SECTION #3. Insert and tighten hardware.

STEP 18:

Insert ELEMENT SECTION #5 into the end of ELEMENT SECTION #4. Insert and tighten hardware.

STEP 19:

To be able to adjust the ELEMENT TIP, a COMPRESSION CLAMP is used. First thread on the hex nut to capture

the screw in the CLAMP. Then slide the COMPRESSION CLAMP such the screw is lined up with the hole in ELEMENT

SECTION #5. Use the DIMENSION SHEET and set the proper exposed length of the 1/2” ELEMENT TIP for the appropri-

ate element, then mark the element assembly to avoid confusion later. See GENERIC COMPRESSION CLAMP DETAIL

page for more detail.

STEP 20:

Tensioning the element over head guys: See the LOCK BLOCK AND KNOT DETAIL page. Familiarize yourself

with knots at the top of VERTICAL RISER, bend the thimbles open and insert them into the holes on the top plate of the

VERTICAL RISER, then bend them back to there original shape. Follow the knot diagram and tie the upper section of

rope, leave no more than 3” of excess rope and finalize by taping the short tail of rope down to the main portion of rope.

Thread the opposite end of the rope through the ELEMENT OVERHEAD SUPPORT (M2APL0212) (See the LOCK

BLOCK AND KNOT DETAIL page) and tension the rope so the element is in a level or neutral position. It is always best to

have the element in a level or neutral position or with a slight sag downward. Over tensioning can lead to a bowed ele-

ment. This finalizes the element construction.

40M2C ELEMENT FINAL

ASSEMBLY INSTRUCTIONS

GROUND OR FLAT SURFACE SCREW, 8-32 X 1-3/4”

AND LOCKNUT

(QTY 2)

ELEMENT SECTION #1

(M2AEP40MC-1)

ELEMENT SECTION #2

(M2AEP40MC-2)

INSIDE ELEMENT SECTION #1

USE 3/16 THIMBLE

AND TIE KNOTS

SEE DIAGRAM

ELEMENT SECTION #3

(M2AEP40MC-3)

COIL ASSEMBLY

ELEMENT SECTION #5

(M2AEP40MC-5)

ELEMENT TIP

(SAEL40MCDD)

LENGTH VARIES

DEPENDING

ON ELEMENT

USE LOCK BLOCK ROPE

ROUTING DETAIL

SEE DIAGRAM

SCREW, 8-32 X 1-1/2”

AND LOCKNUT

(QTY 2)

SCREW, 8-32 X 1-1/4”

AND LOCKNUT

(QTY 2)

40M2C ASSEMBLY DETAIL

BOLT, 1/4-20 X 2”

AND LOCKNUT

(QTY 2)

BOLT, 1/4-20 X 2-1/2”

LOCKNUT, 1/4-20

(QTY 2)

USE 3/16 THIMBLE

AND TIE KNOTS

AND TAPE

SEE DIAGRAM

USE 3/16 THIMBLE

TIE KNOTS

AND TAPE

SEE DIAGRAM

VERTICAL RISER

ASSEMBLY

(SAVR0010)

VERTICAL RISER

ASSEMBLY

(SAVR0010)

1 1/2 U-BOLT & CRADLE

5/16-18 NUT & LOCKWASHER

(QTY 2)

BALUN ASSEMBLY

1:1

(FGBL500)

CLAMP BLOCK, 3/8

(M2AMC0261)

HAIRPIN

TUBE

(M2ADP6675)

(QTY

SHORTING BAR

(M2AHP0262)

SPACER, 3/8 X 1.600

(M2ASR0085)

BAND CLAMP, #52 W HOLE

BOLT, 1/4-20 X 2”

AND LOCKNUT

SET SCREW, 1/4-20 X 1/4”

(QTY 2)

ELEMENT MOUNTING PLATE

(M2AEC0040)

(QTY 2)

CRADLE 3”

(M2AMC0136)

(QTY 2)

CRADLE 3”

(M2AMC0136)

(QTY 2)

BOLT, 1/4-20 X 2-1/2”

LOCKNUT, 1/4-20

(QTY 4)

BOLT, 1/4-20 X 2-1/2”

LOCKNUT, 1/4-20

(QTY 4)

BOLT, 1/4-20 X 3-1/2”

AND LOCKNUT

(QTY 2)

BOLT, 1/4-20 X 3-1/2”

AND LOCKNUT

(QTY 2)

BOLT, 1/4-20 X 2-3/4”

AND LOCKNUT

(QTY 2)

BOLT, 1/4-20 X 2-3/4”

AND LOCKNUT

(QTY 2)

ELEMENT MOUNTING PLATE

(M2AEC0040)

(QTY 2)

ELEMENT ASSEMBLY

REFLECTOR OR DIRECTOR

ELEMENT

ELEMENT ASSEMBLY

DRIVEN ELEMENT

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