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
8/17/11
Rev.00
Model ........................................ 40M4LLDD
Frequency Range....................... 7.0-7.3 MHz
Gain............................................ 7.5 dBi
Front to back .............................. 22 dB
Beamwidth ............................... E=60°
Feed type ................................... Dual Driven
Feed Impedance. ....................... 50 Ohms Unbalanced
Maximum VSWR........................ 2.0:1 Max
Input Connector.......................... SO-239, Other avl.
Power Handling ..........................3 kW, Higher avl.
Boom Length / Dia......................42’ / 3.0 x .125 Wall
Element Length / Dia..................51 Ft
Turning Radius: ..........................33 Ft
Stacking Distance.......................Call
Mast Size....................................2” to 3 ” Nom.
Wind area / Survival ...................13.0 Sq. Ft. / 100 MPH
Weight / Ship Wt.........................142 Lbs. / 160 Lbs.
M2 Antenna Systems, Inc.
Model No: 40M4LLDD
SPECIFICATIONS:
*Subtract 2.14 from dBi for dBd
FEATURES:
The recently upgraded, computer optimized, linear loaded, dual driven 40M4LLDD gets the bandwidth and maintains per-
formance across the band like no other 40 meter Yagi. This was a huge challenge requiring the latest techniques in com-
puter optimization. Gain, Front to Back and VSWR are maintained nearly flat across the whole band! In addition, it is now
better mechanically and easier to assemble. Only the tips of each element are different as all the linear loading settings
are the same for each element. The shorting bars are now 2 piece, clamp type making solid long lasting connections. For
foreign amateurs, two tuning options are available; FULL BAND and LOW END ACCENTUATED, but still broadband.
The resulting design is head and shoulders above the competition in strength, durability and performance. This antenna
has been designed to meet your crossband SSB contesting needs and give you years of enjoyment on the 40 meter band
regardless of future band plan changes.
Mechanically, the elements are butt sleeved to withstand continuous winds of 100 mph or the constant battering of high
winds . This antenna WILL frustrate Mother Nature! The Driven elements are split in the center and insulated with a solid
1-1/4” fiberglass rod. The parasitic element also have solid 1-1/4” center aluminum center section. The 3 kW continuous,
5 kW peak, 1:1 balun completes the package. All hardware is stainless or galvanized except the U-bolts. Options include
parts to add 4 elements for 17 or 20 meters. Call for details.
Summary of Contents for 40M4LLDD
Page 13: ...40M4LLDD TUNNING CHART...
Page 14: ...40M4LLDD ANTENNA PLOTS...
