M2 Antenna Systems 436CP16 User manual

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

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

Rev.03

Model .........................................436CP16

Frequency Range.......................432 To 440 MHz

*Gain ..........................................13.3 dBic

Front to back ..............................15 dB Typical

Beamwidth ...............................42° Circular

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

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

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

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

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

Boom Length / Dia......................65-3/4” / 1”

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

Turning Radius: ..........................64”

Stacking Distance.......................36”

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

Wind area / Survival ...................0.4 Sq. Ft. / 100MPH

Weight / Ship Wt.........................4 Lbs. / 7 Lbs.

M2 Antenna Systems, Inc.

Model No: 436CP16

FEATURES:

The 436CP16 is a light weight, circularly polarized antenna optimized for Low Earth Orbit (LEO) satellite

communications or other applications where a small circular polarized antenna is required. Optimum match and gain are

between 432 & 440 MHz for the satellite band. Rear mounted for easy coaxial cable routing. A preamp can be mounted

close to the antenna for almost no coax loss before the preamp, maximizing your receive performance. Computer design

techniques help keep spurious side lobes low down for optimum signal to noise ratios. This antenna features the same

CNC machined, O-ring and silicone-gel sealed, driven element assemblies common to all M2 Yagi antennas. This insures

years of trouble free performance regardless of weather.

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

436CP16 DIMENSION SHEET

TOOL REQUIRED FOR ASSEMBLY: Screwdriver, 11/32 nut driver or wrench, 7/16” and1/2” socket or

end wrenches, measuring tape.

1. Locate boom sections #1 & #2.

ASSEMBLING THE HORIZONTAL ELEMENTS

2. Lay out the elements by “H” length and position as shown in the DIMENSION SHEET. Start with

the reflector (longest) element. Balance it on your finger to find rough center and push on a black

button insulator to about 1/2” off center. Push the element through the hole in the boom and install

the second button, snugging it up into boom. DO NOT BOTHER CENTERING the element at this

time and DO NOT INSTALL the stainless steel shaft retainers yet. It is easier to do it after all the

horizontal 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 MAY 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, within 1/32", 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. Correct any obvious misalignments.

5. Stainless steel SHAFT RETAINERS lock the elements in place. They should always be used for

permanent and long term antenna installations. For portable or temporary use, the button

insulators are adequate for holding the elements and the retainers may be left off.

To install the stainless steel SHAFT

RETAINERS, 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 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 secured.

6. Mount the HORIZONTAL DRIVEN ELEMENT BLOCK / ROD ASSEMBLY to the TOP of the boom

using a single 8-32 X 1-1/4" screw. Orient the block with the two balun connectors facing to front.

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

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

the Shorting Bars as shown on the Dimension Sheet, with the given dimension between the outer

face of the driven element block and the inner face of the shorting bar. Align the bars with each

other and tighten the set screws.

ASSEMBLING THE VERTICAL ELEMENTS

8. Repeat steps #2 through #5 to install the Vertical elements, using the Dimension Sheet as your

guide to lengths and spacing. Note: The vertical element set is shifted forward on the boom by 1/4

wavelength. This increases isolation between element planes, improving circularity and ease of

phasing / matching the two element sets.

436CP16 ASSEMBLY MANUAL

9. INSTALLATION OF THE VERTICAL DRIVEN ELEMENT BLOCK DETERMINES THE

CIRCULARITY OF THIS ANTENNA. THE ORIENTATION OF THE BLOCK FOR RHC - RIGHT

HAND CIRCULARITY, IS SHOWN ON THE DIMENSION SHEET AND DRAWING AND

DESCRIBED BELOW:

Viewed from the rear of the boom (rearmost Reflector HORIZONTAL), the VERTICAL Driven

Element Block mounts to the RIGHT hand side of the boom with the two Balun connectors

oriented to the FRONT. Secure with 8-32 x 1-1/4” screw. Install the Shorting Bars as in step #7.

10. Install JUNCTION BLOCK to boom with 8-32 x 1-1/4" screw. Depending on model, orientation of

block may vary from drawing - see Dimension Sheet for exact placement. Attach Baluns and

Phasing lines to the Driven Element Blocks and Junction Block as shown in the picture. Tighten

the ‘F’ connectors gently using a 7/16" end wrench. Depending on model and polarity, the Vertical

balun may loop around another element. This is normal. Form balun coax until it is close to the

boom and secure with a nylon cable tie. Also secure the other balun and the matching / phasing

harness coax with cable ties. Ties should be snug but not crushing or kinking the coax.

11. Use good quality coax and “LC” connector for your feedline (see Installation Tips). Secure feed

coax near connector on Junction Block, to provide stress relief. Allow coax to hang in a loop

between the rear end of the boom and the reattachment point (at least 12” beyond element tips) on

the mast or cross boom. Do not route feed line to boom to mast plate as exiting antenna here

will adversely affect circular field.

436CP16 ASSEMBLY MANUAL

D.E. BALUN

PHAS LINE

1/4 WAVE

PHASE LINE

3/4 WAVE

JUNCTION BLOCK

SCREW, 8-32 X 1-1/4”

D.E. BLOCK

D.E. BALUN

D.E. BLOCK

SCREW, 8-32 X 1-1/4”,SS

436CP16 ASSEMBLY MANUAL

12. The boom to mast plate is at the REAR of the boom. Use two 1" U-bolts and the stainless nuts and

lock washers provided. DO NOT OVER TIGHTEN. 2” U-bolts (and stainless steel nuts /

lockwashers) are provided for mounting the antenna to your mast or cross boom, other sizes are

available upon request.

INSTALLATION TIPS

13. A circular polarized antenna creates fields in all planes or polarities. Performance

DETERIORATES SIGNIFICANTLY if it is CENTER MOUNTED on a metal (conductive) mast or

crossboom. A mast or crossboom of any NON-CONDUCTIVE material can be used. Fiberglass is

the prime choice for its strength and weather resistance. Mount the antenna so that element tips

are at least 12” from any conductive material (mast, tower, feedline, etc.).

14. Try to keep the cable run to under 100 ft. to prevent excessive signal loss.

Recommended feedlines, in order of preference:

Andrews or Celwave 1/2” hardline

Times LMR400 or Belden 8214

15. To maintain proper phasing when stacking two or more antennas, mount each with the same

orientation of Driven Element Blocks. DO NOT MOUNT IN MIRROR IMAGE. See the Specification

Sheet for stacking distances. For more detailed stacking information contact M2.

THIS COMPLETES THE ANTENNA ASSEMBLY.

M2ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: [email protected]

DESCRIPTION QTY.

Boom Section #1, 1 x .058 x 36" SOE ................................ 1

Boom Section #2, 1 x .058 x 35-1/4" .................................. 1

Elements, 3/16" alum. rod x (see dims.) ............................. 16

Driven Element Assembly.................................................... 2

Junction Block Assembly (SADE0065)................................ 1

Balun Cable, RG6-U 1/2 Wave............................................ 2

Phase Line Cable, RG6-U 3/4 Wave ................................... 1

Phase Line Cable, RG6-U 1/4 Wave ................................... 1

Shorting bars, .75 x 1.532 x .250" (M2ASB0080) ............... 4

Boom to mast plate, 3 x 4 x .125" (M2APT0019)................. 1

U-bolt and cradle, 1-1/2” ...................................................... 2

U-bolt, 1" ............................................................................. 2

Assembly instructions ......................................................... 1

IN HARDWARE BAG

Button insulators, 3/16" black ............................................. 32

Shaft Retainers, 3/16" ss ..................................................... 32

Nut, 5/16-18 ss .................................................................... 4

Lockwasher, 5/16" ss........................................................... 4

Screw, 8-32 x 1-1/4" panhead ss ........................................ 5

Set screw, 8-32 x 1/4" ss .................................................... 8

Locknut, 8-32, ss ................................................................. 2

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

Lockwasher, 1/4-20 ss ........................................................ 4

Allen wrench, 5/32" ............................................................. 1

Push tube, 3/8 x 3" (for keeper installation) ......................... 1

Cable ties, 8"........................................................................ 5

M2ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: [email protected]

436CP16 PARTS & HARDWARE

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