M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com
©2022 M2 Antenna Systems Incorporated
08/30/22
Rev.01
Model ........................................ 25M4
Frequency Range ...................... 11.9 To 12.10 MHz
Gain ........................................... 9.52 dBi
Front to back .............................. 21 dB Typical
Feed type ................................... Hair Pin Match
Feed Impedance........................ 50 Ohms Unbalanced
Maximum VSWR ....................... 1.2:1
Input Connector ......................... SO-239/Others available
Power Handling ......................... 3 kW, Higher avl.
Boom Length / Dia ..................... 40’ / 2 1/2”
Element Length / Dia. ................ 34’ / 1-1/4”-3/8”
Turning Radius: ......................... Call
Stacking Distance ...................... Call
Mast Size ................................... 2” to 3 ” Nom.
Wind area / Survival .................. 3.5 Sq. Ft. / 100 MPH
Weight / Ship Wt. ....................... 65 Lbs. / 75 Lbs.
M2 Antenna Systems, Inc.
Model No: 25M4
FEATURES:
The 25M4 was designed for high performance while keeping weight, wind area and costs low. Using computer
optimization techniques, every bit of the design has been squeezed for performance. The 25M4 can be stacked for
improved performance. The 1:1 Fairite balun and low loss hairpin match help maintain high efficiency. Element ring
clamps and other important components are CNC machined for maximum strength and electrical integrity. All antenna
hardware is stainless steel and the U-bolts for mounting are zinc plated.
SPECIFICATIONS:
*Subtract 2.14 from dBi for dBd / FS = Free Space
Summary of Contents for 25M4
Page 4: ...D E PARASITIC ELEMENT DETAIL ...
Page 5: ...25M4 DIMENSION SHEET ...
