M2 Antenna Systems 2M5-440XP, Manual

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

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

©2011 M2 Antenna Systems Incoporated 

08/10/11 

Rev.00 

Model ........................................ 2M5-440XP 
Frequency Range ...................... 144-148 / 430-450 MHz 

*

Gain 2M / 440 ........................... 11.14 / 14.14 dBi 

Front to back 2M / 440............... 15 dB / 25 dB 
Feed Impedance........................ 50 Ohms Unbalanced

VSWR ........................................ 1.3:1 
Connectors................................. “N” Female 
Power Handling 2M / 440 .......... 1.5 kW / 750W 
 

 
Boom Length / Dia ..................... 60” / 1” 
Maximum Element Length ......... 40” 
Turning Radius:.......................... 70” 
Stacking Distance ...................... Call Factory 
Mast Size ................................... 1-1/2” to 2” Nom. 
Wind area / Survival................... 1.1 Sq. Ft. / 100 MPH 
Weight / Ship Wt. ....................... 5.5 Lbs. / 7 Lbs. 
 

M2 Antenna Systems, Inc. 

Model No: 2M5-440XP 

SPECIFICATIONS: 

*Subtract 2.14 from dBi for dBd 

FEATURES:

The 2M5-440XP 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. The heart of this antenna is the CNC-

machined Driven Element Block. Connectors are O-ring sealed and the internal connections are encapsulated in a space-
age silicone gel with nearly 4 times the dielectric strength of air. Balun connectors are triple sealed  and nut-sealed at the 
block connectors. Elements are 3/16” 6061-T6 aluminum rod, centered through the boom on UV stabilized insulator 
buttons. All hardware except U-bolts is stainless steel (S.S. nuts and lockwashers are supplied for them, too).