M2 Antenna Systems 75-5AS 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.00

M2 Antenna Systems, Inc.

Model No: 75-5AS

Assembly of the 75-5AS is easy! There are 5 ELEMENT ASSEMBLIES, each one marked with

a different color. There are 5 differently colored bands on the 2” X 104” BOOM that indicates

the mounting position of the element assembly with the matching color. The steps below outline

the assembly process and the correct hardware to use.

1. Install quantity 4, 1/4-20 x 1/2” ss square head set screws into the top of each ring clamp and one in the side.

2. Sort the elements by length and color code into pairs. One pair at a time, insert the open end of each element into the

ring clamp till ti bottoms onthe center roll pin. Tighen the set screws and repeat for the other element half. Continue until all

the element pairs are mounted on the ring clamps. The color bands should be near the ring clamps and the corked element

end should be out.

3. Mount the 'T' MATCH ASSEMBLY BLOCK to the bottom of the boom using the 1/4” hole at 35” from the rear of the

boom, and a single 1/4-20 x 2-1/4” bolt with a 1/4” star washer under the head of the bolt. Orient the two balun connectors

towards the From of the boom.

4. Rotate the boom until the ‘T’ match assembly is on top. With the element tubes on the bottom, slide the ELEMENT

ASSEMBLIES onto the boom from both ends and position directly over the matching colorband. Spread the ring clamp

fingers with a flatbladed screwdriver, if necessary, to ease the movement on boom. Loosely add a 1/4-20 x 1” bolt / locknut

and a 1/4-20 x 1/2” squarehead set screw to each ringclamp. Do not tighten yet.

5. Loosely add two 8-23 x 1/4” setscrews and one 1/4-20 x 1/2” squarehead screw to each SHORTING BAR. Slide the

shorting bars down toward the “T” match assembly on the DRIVEN ELEMENT tubes and onto the ‘T’ MATCH rods.

Position them according to the Dimension Sheet: The measurement is from the outer face of the ‘T’ match block to the

inner face of the shorting bar. Align the rods parallel with the element sections and tighten all setscrews. A 5/64” Allen

wrench has been provided for the smaller setscrews.

6. Push the DRIVEN ELEMENT ASSEMBLY against the ‘T’ match block and tighten the 1/4-20 x 1” bolt and locknut to

secure the element. Tighten the 1/4-20 x 1/2” squarehead setscrew, to ground it.

7. Align the remaining four PARASITIC

ELEMENT ASSEMBLIES parallel to the

DRIVEN ELEMENT ASSEMBLY. Tighten the

1/4-20 x 1” clamp bolts and the 1/4 x 1/2”

setscrews.

8. Align the other four elements and tighten the

1/4-20 X 1” bolt and locknut on each element.

Check to be sure all elements are aligned and

now tighten the square head 1/4-20 X 1/2” set

screws on each element.

9. Before installing the balun, thread a 3/8-32

SEAL NUT all the way onto both block

connectors, black Neoprene side facing out.

Attach balun and tighten connectors gently

using a 7/16” end wrench. Then back the Seal

Nuts out and finger-tighten firmly up against the

face of the connectors (or tighten gently with 1/2”

end wrench). Secure balun coil to the boom with

two nylon cable ties. If the feed connector will be

inaccessible after installation, install a feedline

section reaching a convenient point.

75-5AS DIMENSION SHEET

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

21.437

33.125

84.00

50.875

14.937"

14.937

29.437

14.50

ELEMENT

SPACING

0.0

2.0X.125X104"

10-12-95

GREEN

34.00

YELLOW

34.75

39.25

SET SHORTING BAR

WHITE

7 1/2"

35.313

GRAY

RED

REAR

39.500

ELEMENT

HALF LENGTH

BLUE

75-5AS PARTS & HARDWARE

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

Boom section, 2” x .065 x 104” str. HBA*.........................................1

Element section, 3/4” x see Dimension Sheet, HBA........................10

‘T’ match Assembly,HBA..................................................................1

Balun, RG6U half wave length.........................................................1

Ring Clamp, 2”,HBA.........................................................................5

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

IN HARDWARE BAG ......................................................................QTY

Shorting bars, 1/4” to 3/4”, 1/2” x 1” x 4.375”, HBA..........................2

Set screw, 1/4-20 x 1/2” square head ss..........................................27

Bolt, 1/4-20 x 2-1/4” ss.....................................................................1

Bolt, 1/-20 x 1” ss .............................................................................5

Nuts, 1/4-20, ss, nylock....................................................................5

Set screw, 8-32 x 1/4” internal Allen head, ss..................................4

Nylon tie, large black, 11”.................................................................5

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

Allen wrench, 5/64”...........................................................................1

*HBA stands for hard black anodized

M2ANTENNA 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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