M2 Antenna Systems 40M3FS Assembly Manual
FEATURES
The 40M3FS is a full sized 40 meter Yagi designed for the various interests and band segments. We provide
you the dimensions to optimize the antenna just for your needs. The result is a powerful package of clean mechani-
cal design, quality materials, and outstanding performance that will deliver years of enjoyment on the 40 meter band.
Note the pattern and gain of 10 dBd when the antenna is only 50 feet above ground! Gain increases with height
above ground and can approach 6 dB more than the free space gain of 6 dBd.
The rugged aluminum boom is 3-1/2 O.D. .23” wall in the middle with 3” x .125 wall tips. Elements diameters
start at 2-1/2” x .125 wall 6061-T6 are and are mounted to the boom using machined saddles and stainless hard-
ware. All three elements are supported by a phillystran overhead guy system. The element sections have been
computer optimized for at least 100 MPH winds. An overhead guy system is supplied for the boom as well. All
hardware except for the U-Bolts is stainless steel. A hairpin type match couples the 5 kW 1:1 balun to the feedline.
The antenna is completely DC grounded. Compare performance, construction and durability....you’ll agree that this
40 meter Yagi is tops in its class!
M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com
©2014 M2 Antenna Systems Incorporated
02/05/13
Rev.01
Model .................................... 40M3FS
Frequency.............................. 7.0-7.3(200 kHz BW)
Gain ....................................... 8.1 dBi
Front to back.......................... 20 dBd Typical
Front to side........................... 30 TO 45 dB x height
Beamwidth, AZ .................... 60°
Feed type............................... SO-239 (‘N’ Opt.)
Feed Impedance. ................... 50 Ohms Unbalanced
VSWR .................................... 1.3:1 typ. 2:1 Max
Power Handling ..................... 3 kW Others avl.
Boom Length / Dia ................. 47’ 6” / 3-1/2”
Element Dia. .......................... 2-1/2” to 1/2”
Turning Radius: ..................... 44” Ft
Stacking Distance .................. 98’ opt.
Mast Size ............................... 2” to 3 ” Nom.
Wind area / Survival .............. 17.5 Sq. Ft./100 MPH
Weight / Ship Wt. ................... 180Lbs. / 190Lbs.
M2 Antenna Systems, Inc.
Model No: 40M3FS
SPECIFICATIONS:
*Subtract 2.14 from dBi for dBd / FS = Free Space