M2 Antenna Systems 440-18X Bedienungsanleitung

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 .........................................440-18X

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

*Gain ..........................................16.5 dBi

Front to back ..............................24 dB Typical

Beamwidth ...............................E=27° H=32°

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

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

Maximum VSWR........................1.5:1 Average

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

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

Boom Length / Dia......................135”’ / 1” To 3/4”

Maximum Element Length..........14”

Turning Radius: ..........................69’

Stacking Distance.......................51” High & 52” Wide

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

Wind area / Survival ...................0.68 Sq. Ft. / 100 MPH

Weight / Ship Wt.........................5 Lbs. / 7 Lbs.

M2 Antenna Systems, Inc.

Model No: 440-18X

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 440-18X replaces our very popular 440-18. The 440-18X 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 im-

pressed.

The heart of the 440-18X 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 440-18X offers you uncompromising performance, enduring mechanical construction, and long term electrical integrity.

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

1. Start by laying out the boom sections using the DIMENSION sheet as a guide. Use 8-32 X 1-1/4 screws and

locknuts to join sections. Sections may be swaged to fit each other or use short internal splice sections.

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. NOTE: The SHAFT RETAINERS, used for securing the elements, should always be used for

permanent and long term antenna installations. For portable or temporary use, or whenever it is

anticipated that the antenna will be disassembled within a short time, the retainers may be left off

or installed on one side only. The button insulators, normally a tight fit, hold the elements quite

securely.

Begin installing the stainless shaft retainers. Use thumb and index finger to hold a Shaft Retainer over end of

the 3/8 x 3” push tube (Shaft Retainer dished into tube). Hold the element firmly and start the keeper onto

the rod by applying pressure with the push tube. Push the Shaft Retainer until up tight against the button

insulator (Locking pliers, lightly clamped up against opposite button insulator will help maintain center

reference and keep you from pushing the first Shaft Retainer too far). It is a good idea to install the second

SHAFT RETAINER after final testing.

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

Orient the block with feed connector facing to center and balun connectors facing to rear. Block orientation

may be reversed if you wish feedline to exit from rear of boom.

440-18X ASSEMBLY MANUAL

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 balance point, approximately 52” from the rear . 1" U-

bolts and the stainless nuts and lock washers provided. DO NOT OVER TIGHTEN. 2” U-bolts are provided

for mounting the antenna to your mast. Since the feed line represents significant weight it is best to have it

attached and fastened along the boom with cable ties before balancing the boom and mounting the plate.

10. INSTALLATION, TESTING & STACKING INFORMATION

A. 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.

B. Test the antenna, connectors and feedline, BEFORE installing to your mast or tower. At 6 feet or more

the antenna will exhibit VSWR similar to higher mounting heights. Set antenna on a ladder or temporary

mast. Check for continuity and match across the band. It should be close to “spec” across the rated

bandwidth. When satisfied, add the second SHAFT RETAINERS as described in step 5.

C. 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 1/2 wavelength in order to maintain

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

4. As a general rule, you never want to have metallic structures, such as a mast or feed lines parallel to the

elements unless it is behind the reflector. Having a metallic structure in the same plane as the elements in

front of the reflector element can cause VSWR problems and or skewed patterns.

FOR HORIZONTAL POLARIZATION, the antenna may be mounted to a METALLIC vertical mast or a

horizontal NON-METALLIC cross boom. If mounted to a horizontal cross boom, route the feedline forward to

the boom-to-mast plate, loop down, and bring back to cross boom at least 6” beyond element tips. Antennas

are typically stacked one above the other in horizontal polarity. SEE SPEC SHEET FOR STACKING

DISTANCE. See Stacking Reminders.

FOR VERTICAL POLARIZATION, the antenna may be mounted to a NON METALLIC VERTICAL MAST or

a horizontal METALLIC cross boom. If mounted to a NON METALLIC vertical mast, turn the driven element

180 degrees so the feed line and “N” connector is facing to the rear of the antenna. Route the feed line to

the rear of the antenna, keeping 4” to 6” behind the reflector element. Let the cable droop at least 6 inches

BELOW THE VERTICAL ELEMENT TIPS. Re-attach the feed line to the mast below the element tips. A

simple structure can easily be fabricated if you want something to support the feed line. See M2 “L” brace kit

for ideas. Vertically polarized Antennas are typically stacked side by side on a horizontal cross boom. See

Stacking Reminders.

If you are unsure about stacking multiple antennas, please call M2 and let us help you DO IT RIGHT! Visit

our website, https://www.m2inc.com/blog/ for other tips.

Stacking? Call M2and let us help you DO IT RIGHT

THIS COMPLETES THE ANTENNA ASSEMBLY.

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

440-18X ASSEMBLY MANUAL

440-18X DIMENSION SHEET

BTM PLATE POSITION

ANTENNAS CENTER OF BALANCE

52.00” FROM THE REAR OF ANTENNA

440-18X PARTS & HARDWARE

DESCRIPTION QTY

BOOM SECTION, 1 X .065 X 37-3/4” SOE(M2ABS44018X-1)....................1

BOOM SECTION, 1 X .065 X 37-3/4” SOE(M2ABS44018X-2)....................1

BOOM SECTION, 1 X .065 X 37-3/4” SOE(M2ABS44018X-3)....................1

BOOM SECTION, 3/4 X .049 X 27-3/4”(M2ABS44018X-4) .........................1

ELEMENTS, 3/16 ROD x DIMENSION SHEET ...........................................18

DRIVEN ELEMENT ASSEMBLY(SADEA432UHF1)....................................1

BALUN, RG-6 1/2 WAVE(SABL70CM) ........................................................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...............................................................................36

KEEPER, SS................................................................................................36

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

LOCKWASHER, 5/16 SS .............................................................................4

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

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

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

SCREW, 8-32 X 1-1/4 SS ............................................................................7

LOCKNUT, 8-32 SS .....................................................................................6

CABLE TIE, NYLON ....................................................................................3

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: [email protected]

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