M2 Antenna Systems 2M-440XPSS 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.01

M2 Antenna Systems, Inc.

Model No: 2M-440XPSS

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

Model .........................................2M-440XPSS

Frequency Range.......................144-148 / 420-450 MHz

*Gain 2M / 440...........................8.3 / 11 dBi

Front to back 2M / 440...............20 dB / 18 dB

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

VSWR.........................................1.5:1

Connectors.................................SO-239

Power Handling 2M / 440...........500W / 500W

Boom Length / Dia......................41-1/4” / 1”

Maximum Element Length..........40”

Turning Radius...........................42”

Stacking Distance.......................Call Factory

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

Wind area / Survival...................0.31 Sq. Ft. / 75 MPH

Weight / Ship Wt.........................2 Lbs. / 5 Lbs.

FEATURES:

The 2M-440XPS is ideal for linking repeaters and remote bases utilizing both 2 meters and 440 MHz. Elements

are cross polarized to avoid the severe performance compromises on 440 MHz common to other dual band antennas that

have all elements in the same polarity. The XP also works well on the OSCAR frequencies and is handy wherever dual

band capability and compact size are required. Recently, with PACKET users finding horizontal polarization better on 2

meters, it has become even more useful.

Construction is designed for long term mechanical and electrical integrity. Elements are 3/16” 6061-T6 aluminum

rod, centered through the boom on UV stabilized insulator buttons. All hardware is stainless steel.

Tools handy for assembly process: Phillips head screwdriver, 5/16”,11/32” spin-tight or socket, 7/16”

end wrenches / sockets, measuring tape. (Note: Repeat Steps 1—15 for both antennas).

1. This antenna uses a one-piece boom that will be rear mounted.

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

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

element. Push the reflector element through the element hole towards the rear of the boom. (Refer

to the DIMENSION sheet for proper placement) Install the second button insulator on the other

side of the element, pushing 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 of the elements are installed in the boom.

3. Install the DRIVEN ELEMENT in the same way as you did the reflector element. Then continue

with the installation of the DIRECTOR or DIRECTORS.

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

sticking out on each side of the boom. Once you have all of 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 keepers to secure the elements.

NOTE: For portable or temporary use of the antenna, the

keepers 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 keeper over the

end of the PUSH TUBE. Make sure that the internal fingers of

the keeper are dished into the push tube. HOLD THE

ELEMENT FIRMLY TO PREVENT IT FROM SLIDING OFF

CENTER and press the keeper onto the element end and

continue until the keeper is snug on the insulator button.

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

reference. If you push the first keeper too far, remove the element from the boom, push the keeper

completely off the element, and start over. Install another keeper to the opposite side of the

element. Continue installing keepers until all elements are locked in place.

6. Next, assemble the Gamma Match assembly. Start by sliding

a #6 flat washer over the end of the Gamma Feed block stud.

7. Slide the Gamma Insulator over the Gamma Rod, leaving 1/8”

of the insulator exposed beyond the end of the Gamma Rod.

Slide this Gamma Rod and Insulator over the end of the

Gamma Feed block stud.

8. Now, slide a #6 lock washer over the Gamma Feed block stud

and finish the assembly with a 6-32 nut. *Note* The connector

stud can spin freely. Use a pair of needle nose pliers or a

small wrench to hold the flat surface when tightening.

9. Next, attached the Gamma Match assembly to the boom, using a single 8-32 x 1 1/4” screw. Make

sure to orient the Feed connector towards the rear of the antenna.

10. Now slide the Gamma Tube over the Gamma Insulator and refer to the DIMENSION sheet for

proper placement.

Installing Keepers

2M-440XPSS ASSEMBLY MANUAL

11. Install the two halves of the Shorting Bar onto the Gamma Tube and the driven element below.

Refer to the DIMENSION sheet for proper location of the shorting bar. Tighten the shorting bar in

place using a single 8-32 x 7/8” screw and lock nut.

12. Now Slide the 3/8” x 1/2” Vinyl cap over the Gamma Tube until it is flush with the end of the

Gamma Tube.

13. At this point it is important to determine whether your antenna will be mounted horizontally (SSB/

CW) or Vertically (FM). Locate the two sets of holes at the rear of the antenna.

14. Insert the 2” u-bolt into the uni-cradle and slide this assembly into one of the two sets of holes on

the rear of the boom. Finish the assembly by installing (2) 1/4” lock washers and 1/4-20 nuts.

15. MOUNTING FOR HORIZONTAL OR VERTICAL POLARIZATION

Route the feed line coax towards the rear of the antenna past the reflector element and onto your

mast. Secure the feed line coax to the antenna boom with the supplied nylon ties. When mounting

the antenna vertically polarized, make sure to orient the gamma tube with the vinyl cap

facing up.

To maintain good VSWR and antenna pattern: Keep metallic masts, cross booms and the feed line

coax out of the element plane.

Stacking or Phasing ? Call us and 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]

2M-440XPSS ASSEMBLY MANUAL

2M3-SS DIMENSION SHEET

440-6SS DIMENSION SHEET

GAMMA MATCH PARTS & HARDWARE

DESCRIPTION QTY

BOOM SECTION, 1 X .058 X 41-1/4”.....................................1

2M ELEMENTS, 3/16 ROD X SEE DIM SHEET ....................3

2M GAMMA ROD, 3/16 X 3.25 ALUM ROD..........................1

2M GAMMA TUBE, 3/8 X .058 X 3.00 ALUM TUBE ..............1

2M GAMMA INSULATOR, 1/4” X .031 X 2.50 TEFLON.........1

440 ELEMENTS, 3/16 ROD X SEE DIM SHEET ...................6

440 GAMMA ROD, 3/16 X 2.0 ALUM ROD...........................1

440 GAMMA TUBE, 3/8 X .058 X 1.75 ALUM TUBE..............1

440 GAMMA INSULATOR, 1/4” X .031 X 1.625 TEFLON......1

GAMMA CONNECTOR BLOCK ASSEMBLY.........................2

VINYL CAP, 3/8” X 1/2” .........................................................2

UNI CRADLE..........................................................................1

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

HANDLE GRIP .......................................................................1

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

HARDWARE BAG:

SHORTING BAR, 1/4 X 3/8 X 1.688.......................................4

BUTTON INSULATORS, 3/16................................................18

KEEPERS, 3/16 SS................................................................18

SCREW, 8-32 X 1.25 SS........................................................2

SCREW, 8-32 X .875 SS........................................................2

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

FLATWASHER, #6 SS ...........................................................2

LOCKWASHER, #6 SS ..........................................................2

NUT, 6-32 SS.........................................................................2

LOCKWASHER, 1/4 SS .........................................................2

NUT, 1/4-20 SS......................................................................2

NYLON TIE, (MEDIUM) .........................................................6

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

M2ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: [email protected]

2M-440XPSS PARTS & HARDWARE

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