M2 Antenna Systems 6M3 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.01

Model ........................................6M3

Frequency Range......................50.0 To 50.6 MHz

Frequency Range......................51.0 To 54.0 MHz

*Gain..........................................8.2 dBi

Front to back..............................20 dB Typical

Beamwidth ...............................E=64° H=90°

Feed type...................................“T” Match

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

Maximum VSWR .......................1:1 @ 50.75 mHz

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

Power Handling..........................3 kW

Boom Length / Dia.....................6’ 9” / 1-1/2”

Maximum Element Length.........9’ 8”

Turning Radius:..........................6’ 3”

Stacking Distance ......................14’ High & 18’ Wide

Mast Size ...................................1-1/2” to 2” Nom.

Wind area / Survival...................1.2 Sq. Ft. / 100 MPH

Weight / Ship Wt........................6 Lbs. / 8 Lbs.

M2 Antenna Systems, Inc.

Model No: 6M3

FEATURES:

The 6M3 is a light but rugged computer optimized Yagi offering low wind load and great performance for its size.

It will compliment the rest of your antennas and tower system. Quick and easy to assemble, it is also great for mountain

topping, grid expeditions and DXpeditions. The 6M3 features the same machined aluminum mounting blocks and sealed

‘T’ match block that its big brothers use. The 6M3 is perfect for the ham trying 6 meters for the first time or the the sea-

soned vet who may stack them for improved gain. For the serious 6 meter enthusiast, it provides and effective, inexpen-

sive building block for vertical stacks and MOONBOUNCE arrays. A tuning chart is included for the FM band

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

TOOLS REQUIRED: Screwdriver, 11/32 wrench, socket or spintite, a 7/16" and 1/2" wrench or

socket, tape measure.

1. Layout the boom sections as shown on Dimension Sheet and assemble with 8-32 x 1-3/4" screws,

lockwashers and nuts. Tighten the nuts securely.

2. Use the Dimension Sheet as reference for installing the ELEMENT HALVES on to the ELEMENT

MOUNTING BLOCKS. Use the 8-32 x 1" screws and locknuts.

3. Mount the longest element (REFLECTOR - 57-7/8” element halves) to the hole at the rear end of

the boom using a 8-32 x 2" screw and locknut. Tighten securely.

4. Mount the DRIVEN ELEMENT next, threading the 2” screw into the 'T' MATCH BLOCK held to the

underside of the boom. Orient the match block with the “N” feed connector pointed to the front. Mount

the remaining DIRECTOR ELEMENTS. Carefully note lengths on Dimension Sheet:

5. Thread the gold SEAL NUTS all the way onto the two small connectors on the 'T' match block with

the black neoprene side out. Then connect the balun connectors and tighten them GENTLY with a

7/16" end wrench. Now run the seal nuts up against the face of the balun connectors and tighten them

about 1/2 turn with a 1/2" end wrench. Secure coiled balun to boom with two nylon ties.

6. Install two 8-32 x 1/4” Setscrews into each SHORTING BAR. Then slide a SHORTING BAR onto

each DRIVEN ELEMENT HALF and position per the DIMENSION SHEET oN the “T” match rods.

Align rods and element halves parallel and tighten the set screws with the 5/64" Allen wrench.

7. Install the feedline, tightening the Male connector carefully, and route the cable forward to the

balance point, securing it with the cable ties provided.

8. Mount the BOOM TO MAST PLATE perpendicular to elements at the physical balance point of the

TYPICAL HARDWARE ARRANGEMENT

ELEMENT MOUNTING BLOCK

8-32 X 2" SCREW

AND LOCKNUT

DRIVEN ELEMENT

SHORTING

BAR

1/2 WAVE LENGTH

RG6-U BALUN

1-1/2" BOOM

REFLECTOR

ELEMENT

8-32 X 1" SCREW

AND LOCKNUT

FEEDLINE

8-32 X 1/4" SETSCREW

"T" MATCH

BLOCK

NYLON TIE

6M3 ASSEMBLY MANUAL

antenna. Secure with the 1-1/2" U-bolts, 5/16” stainless steel lockwashers and nuts. Do not over-

tighten as severe boom distortion and subsequent weakening can occur. 2” U-bolts are supplied for

attaching plate to your mast.

9. When the antenna is installed in position on the mast, the main feedline can be attached and sealed

at that time. 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 HF

models, maintain a minimum 5’ of separation; more if practical. Mount horizontally polarized VHF and

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

10. INSTALLATION AND STACKING INFORMATION

A. A mast or cross boom that is mounted to this antenna in the element plane must be non

conductive (fiberglass, etc).

B. To protect your investment in this high performance antenna, always use high quality coax and

connectors. Old, corroded, or poor quality materials are common sources of serious performance

losses.

C. If possible, test the antenna, connectors and feedline BEFORE installing to your mast or tower.

Set antenna on a tall wooden or fiberglass ladder or temporary mast. Check for continuity and

match across the bandwidth. It should be similar to rated specifications and plots.

D. STACKING REMINDERS:

1. All driven element blocks MUST be oriented to the same side of boom.

2. All boom-to-mast plates MUST be mounted at the same point on the boom.

3. Feed / phasing lines MUST be of equal electrical length or multiples of 1 wavelength in order to

maintain equal phasing in the array. Improper phasing can severely deteriorate performance.

If you are unsure about stacking multiple antennas, please call M2and let us help you DO IT

RIGHT

THIS COMPLETES THE ANTENNA ASSEMBLY.

Carefully manufactured by:

M2ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: [email protected]

6M3 ASSEMBLY MANUAL

BOTTOM VIEW

To optimize the 6M3 from 51 to 52 MHz trim reflector to 56.125"

" driven el. to 54.625"

" director to 51.00"

" driven el to 53.875"

" director to 50.375"

To optimize the 6M3 from 52 to 53 MHz trim reflector to 55.375"

" driven el to 52.75"

" director to 49.25"

To optimize the 6M3 from 53 to 54 MHz trim reflector to 54.25"

TYPICAL VSWR CURVES ABOVE 10' IN HEIGHT.

COUPLE BOOM SECTIONS

WITH 8-32 X 1-3/4" SCREWS

AND LOCKNUTS

50.4

51.4

50.2

51.2

50.0

51.0

1.2:1

1.5:1

FM typical

curve over

1 MHz section.

50.6

51.6 51.8 52.0

cw/ssb

2.0:1

81.375

SHORTING BARS

LOCKED WITH

8-32 X 1/4" SET

SCREWS

MOUNT DRIVEN ELE.WITH

AN 8-32 X 1-3/4" SCREW

41.00

57.0

0.50

ELEMENT

SPACING 0.0

USE 8-32 X 1"

SCREW AND

LOCKNUTS

53.25

SECURE BALUN WITH

BLACK NYLON TIES.

For upper 1 MHz sections, the

'T' match dimension may have

to increase by 1"or more.

MOUNT BOOM TO

MAST PLATE JUST

IN FRONT OF OR JUST

BEHIND THE DRIVEN

ELEMENT.

8.0"

56.00"

ALL ELEMENTS 3/8" TUBE.

USE 8-32 X 2"

SCREW AND LOCKNUT

TO MOUNT BLOCKS

57.50

6M3 DIMENSION SHEET

DESCRIPTION QTY

Boom Section #1 1 1/2 x .058 x 60" S.O.E. Alum............................1

Boom Section #2 1 1/2 x .058 x 25" Alum. ......................................1

Boom Plate 4 x 6 x 3/16 Alum. ........................................................1

Element 57.5 x 3/8” tube..................................................................2

Element 56.00 x 3/8” tube................................................................2

Element 53.25 x tube.......................................................................2

Driven `T' Match Assembly with SO-239 conn. ...............................1

Balun, 4:1, 50 MHz, RG-6................................................................1

Assembly Instructions......................................................................1

BAG #1

U-Bolt 2"...........................................................................................2

U-Bolt 1 1/2".....................................................................................2

HARDWARE BAG

Shorting Bars 3/4” x 1/4” x 2-7/8" machined alum...........................2

Element Mounting Blocks 3/4” x 3/8” x 3" alum. for 1-1/2” boom.....3

Screw 8-32 X 2" panhead ss ...........................................................3

Screw 8-32 x 1 3/4" panhead ss......................................................2

Screw 8-32 x 1" panhead ss............................................................6

Locknut 8-32 ss ...............................................................................10

Nuts 5/16-18 ss................................................................................8

Lockwashers 5/16” Split Ring..........................................................8

Cable Ties 8" Black..........................................................................4

Screw Internal Hex Set 8-32 x 1/4” ss .............................................4

Allen Wrench 5/64” ..........................................................................1

Nut Seals.........................................................................................2

M2ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: [email protected]

6M3 PARTS & HARDWARE

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