M2 Antenna Systems 440-11X Manuale utente

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

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

REV B

Model .........................................440-11X

Frequency Range.......................420 To 450 MHz

*Gain ..........................................13.44 dBi

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

Beamwidth ...............................E=34° H=43°

Feed type ...................................Folded Dipole

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

Maximum VSWR........................1.5:1 Typical

Input Connector..........................“N” Female

Power Handling ..........................1 kW

Boom Length / Dia......................60” / 1”

Maximum Element Length..........13-3/4”

Turning Radius: ..........................55”

Stacking Distance.......................34” High & 36” Wide

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

Wind area / Survival ...................0.6 Sq. Ft. / 100 MPH

Weight / Ship Wt.........................4 Lbs. / 6 Lbs.

M2 Antenna Systems, Inc.

Model No: 440-11X

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

FEATURES:

M2 is always trying to design and build new antennas to fit the needs of amateur radio operators. The “X” series of antennas are all designed

to keep the packaging under 48” long to minimize oversize surcharges applied by shippers. The “X” series antennas offer the same performance as its

predecessor, but with shorter boom sections. The boom sections also have a thicker wall for added strength. A side benefit of the “X” series antennas

are that they are more portable with the smaller sections.

The 440-11X replaces our very popular 420-50-11. The 440-11X is a computer optimized broadband yagi featuring an excellent pattern and

good gain across its bandwidth. It can be mounted vertically or horizontally and is ideal for stacking two or more for additional gain. Its light weight yet

sturdy construction keep the cost low and the performance high. Use it for ATV, OSCAR, FM, LONG HAUL TROPO, ETC. We guarantee you will be

impressed.

The heart of the 440-11X is a unique Driven Element Module with superior weather resistance and power handling abilities. All connectors are

O-ring sealed to the CNC machined block and internal connections are sealed in a space-age silicone gel with a dielectric strength nearly 4 times

greater than air. The Balun coax connectors are triple O-ring sealed. Other key mechanical and electrical parts are CNC machined from 6061-T6 alumi-

num and all hardware except U-bolts is stainless steel.

The 440-11X offers you uncompromising performance, enduring mechanical construction, and long term electrical integrity.

Tools handy for assembly process: screwdriver, 11/32” spin-tite or socket, 7/16” and 1/2” end

wrenches / sockets, measuring tape.

1. This antenna uses a one-piece boom.

2. Lay out the elements by length and position as shown the DIMENSION sheet. Start with the

reflector (longest) element and push on a black button insulator to about 1/2” from center. Push the

element through the holes 1/2" from the rear of the boom and install the second button, snugging it

up into boom. DO NOT BOTHER WITH ACCURATELY CENTERING the element at this time and

DO NOT INSTALL the stainless steel internal locking “KEEPERS” yet. This is easier to do after all

the elements are installed in the boom.

3. Install the 3/16” rod DRIVEN ELEMENT as you did the reflector. Then continue with the installation

of the DIRECTORS. Note that the Director Elements do not consistently diminish in length

from rear to front, so pay close attention to length and position.

4. Now begin centering the elements. Use a tape measure to EQUALIZE the amount the element

sticking out on each side of the boom. Once you have all the elements centered, sight down the

element tips from the rear comparing each side. Look for any obvious discrepancies and correct if

found.

5. Install the stainless steel SHAFT RETAINERS to secure the elements. NOTE: For portable or

temporary use of the antenna, the retainers may be left off. The button insulators, normally a tight

fit, hold the elements quite securely.

To install, use thumb and forefinger to hold the retainer over the end of the PUSH TUBE ( 3/8" x 3"

tube, supplied in the kit), internal fingers on retainer dished into tube. HOLD THE ELEMENT

FIRMLY TO PREVENT IT FROM SLIDING OFF CENTER and press the retainer onto the element

end and continue until retainer butts on insulator button. Locking pliers, lightly clamped up against

440-11X ASSEMBLY MANUAL

opposite button insulator will help maintain center reference. If you push the first retainer too far,

remove element from boom, push retainer completely off the element, and start over. Install

another retainer to the opposite side of the element. Continue installing retainers until all elements

are locked in place.

6. Mount the DRIVEN ELEMENT BLOCK to the boom using a single 8-32 X 1-1/4" screw and lock

washer. Orient the block with type “N” feed connector facing to the rear and balun connectors

facing to the front. Block orientation may be reversed if you wish to center mount antenna.

7. Attach balun and tighten the connectors gently using a 7/16" end wrench. A lot of torque is

unnecessary. Form the balun close to the boom and secure to boom with a nylon cable tie. Tie

should be snug but not crushing or kinking the coax.

8. Install the 8-32 x 1/4” set screws (internal Allen head - tool supplied) into the SHORTING BARS.

Slide the bars onto the 3/16” rod driven element tips and 1/8” Driven Element Block Rods. Position

the Shorting Bars as specified on the Dimension Sheet: the distance given is between the outer

edge of the Driven Element Block and the inner edge of the Shorting Bar. Align the bars and rods

with each other and tighten the setscrews.

9. The boom to mast plate is normally mounted at the rear of the boom using 1" U-bolts and the

stainless locknuts provided. DO NOT OVER TIGHTEN. 2” U-bolts, cradles, and stainless hardware

are provided for mounting the antenna to your mast. Secure feed coax to boom and mast with

harness ties.

10. MOUNTING

THIS ANTENNA CAN BE REAR MOUNTED IN ANY POLARITY TO ANY TYPE OF 2” MAST.

IF YOU PLAN TO CENTER-MOUNT THE ANTENNA PLEASE FOLLOW THE GUIDELINES

BELOW:

Maintain good VSWR and pattern: Keep metallic masts, cross booms and the feed coax out of the

element plane.

FOR HORIZONTAL POLARIZATION, the antenna may be center-mounted to a metallic vertical mast

or a horizontal NON-METALLIC cross boom (no conductive material in element plane). If mounted

to a horizontal cross boom, route the feedline forward to the boom-to-mast plate, loop down at

right angles to the element plane, and bring back to cross boom at least 6” beyond element tips.

FOR VERTICAL POLARIZATION, the antenna may be center-mounted to a NON METALLIC

VERTICAL MAST (no conductive material in element plane) or a horizontal metallic cross boom. If

mounted to a vertical mast, route the feed line forward to the boom-to-mast plate, loop out at a

right angle to the boom, and bring down to the mast at least 6 inches BELOW THE ELEMENT

TIPS. The feedline may also exit at the rear of the boom and loop back to the mast.

Stacking? Call M2and let us help you DO IT RIGHT

THIS COMPLETES THE ANTENNA ASSEMBLY.

440-11X ASSEMBLY MANUAL

440-11X DIMENSION SHEET

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

BOOM SECTION, 1 X .065 X 31” (M2ABS440-11X-1).................................1

BOOM SECTION, 2 X .065 X 31” (M2ABS440-11X-2).................................1

ELEMENTS, 3/16 ROD x Dimension Sheet .................................................11

DRIVEN ELEMENT ASSEMBLY (SADEA432UHF-1)..................................1

BALUN, RG-6 1/2 WAVE .............................................................................1

BOOM-TO-MAST PLATE, .188 X 3” X 4” (M2APT0019).............................1

U-BOLT AND CRADLE, 2” ...........................................................................2

U-BOLT, 1” ...................................................................................................2

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

IN HARDWARE BAG:

SHORTING BAR (M2ASB0080)...................................................................2

BUTTON INSULATORS...............................................................................22

KEEPER, SS ................................................................................................22

NUT, 5/16-18 SS ..........................................................................................4

LOCK WASHER, 5/16 SS ............................................................................4

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

SETSCREW, 8-32 X 1/4, SS........................................................................4

SCREW, 8-32 X 1-1/4 SS.............................................................................3

LOCKNUT, 8-32” SS ....................................................................................2

LOCK WASHER, #8 SS ...............................................................................1

CABLE TIE, NYLON ....................................................................................2

ALLEN HEAD WRENCH, 5/64”....................................................................1

PUSH TUBE, 3/8 X 3” ..................................................................................1

Carefully manufactured by:

M2 ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: sales@m2inc.com

440-11X PARTS & HARDWARE

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