M2 Antenna Systems 2M4 Assembly Manual

SPECIFICATIONS:

Model ......................................... 2M4

Frequency Range ....................... 144 To 148 MHz

*Gain .......................................... 9.6 dBi

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

Beamwidth ............................... E=54° H=74°

Feed type ................................... "T" Match

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

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

Input Connector .......................... "N" Female

Clean mechanical design, full band coverage and computer optimized performance make the 2M4 an exceptional

antenna. A totally sealed and grounded driven element design with a unique internal balun provides the heart that will

beat for years to come. It is perfect for base and portable use, with FM, Packet or SSB. Every station needs one!!!

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

M2 Antenna Systems, Inc.

*Subtract 2.14 from dBi for dBd

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

Model No: 2M4

Power Handling .......................... 2.5 kW

Boom Length / Dia ...................... 48" / 1"

Maximum Element Length .......... 40-1/2"

Turning Radius: .......................... 55"

Stacking Distance ....................... 66" High & 80" Wide

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

Wind area / Survival ................... 0.50 Sq. Ft. / 100 MPH

Weight / Ship Wt. ........................ 3 Lbs. / 4 Lbs.

05/26/15

Rev.01

Table of Contents

Do you have a question about the 2M4 and is the answer not in the manual?

Page 1: Specifications
*Subtract 2.14 from dBi for dBd FEATURES: Clean mechanical design, full band coverage and computer optimized performance make the 2M4 an exceptional antenna. A totally sealed and grounded driven element design with a unique internal balun provides the heart that will beat for years to come.
Page 2 2M4 ASSEMBLY MANUAL Tools handy for assembly process: screwdriver, 11/32” spin-tite or socket, 7/16” and 1/2” end wrenches / sockets, measuring tape. 1. Lay out the elements by length and position as shown the DIMENSION sheet. Start with the REFLECTOR (longest) element. Balance on finger to find rough center and push on a black button insulator to about 1/2”...
Page 3 Check for continuity and match across the rated bandwidth. C. REAR MOUNTING: The 2M4 is easily rear-mounted in either horizontal or vertical polarity. A metal mast or crossboom will have no effect on performance.
Page 4 2M4 DIMENSION SHEET...
Page 5 2M4 PARTS & HARDWARE Description Boom, 1 x .058 x 53" alum......... 1 Boom insert, 7/8 x .058 x 9.0" alum....1 Elements, 3/16" rod alum........4 “T” match block &1/4” rods ........ 1 BTM plate, 3 x 4 x 1/8” (M2APT0019) ....1 Balun, RG-6 ............