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SPECIFICATIONS:
Model ........................................ 10M4DX
Frequency Range ...................... 28.0 To 28.8 MHz
*Gain, (FS) / Over gnd ............... 10.1dBi / 15.7dBi @35'
Front to back .............................. 22 dB Typical
Beamwidth ............................... E=53° / H=68°
Feed type ................................... Hair pin match
Feed Impedance........................ 50 Ohms Unbalanced
Maximum VSWR ....................... 1.2:1
Input Connector ......................... SO-239, Others avl.
FEATURES:
The 10M4DX was designed for high performance while keeping weight, wind area and costs low. Using computer
optimization techniques, we have squeezed for excellent performance on both the CW and phone. The 10M4DX is a
great antenna to stack with more 10M4DX Yagis or with other HF antennas. Mechanically, CNC machined aluminum
(6061-T6) ring clamps ground the elements to the boom and make assembly a snap. A hairpin type match couples the 3
kW 1: balun to the feed line. The antenna is completely DC grounded. Great effort has been put into making sure this an-
tenna stays in the air for years to come while providing enjoyment and satisfaction along the way.
M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
M2 Antenna Systems, Inc.
Model No: 10M4DX
*Subtract 2.14 from dBi for dBd / FS = Free Space
Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com
©2014 M2 Antenna Systems Incorporated
Power Handling ......................... 3 kW, Higher avl.
Boom Length / Dia ..................... 24' / 2" x .065 Wall
Element Length / Dia. ................ 18.5' / 1" To 1/2"
Turning Radius: ......................... 14' 8"
Stacking Distance ...................... 25' To 31'
Mast Size ................................... 2" to 3 " Nom.
Wind area / Survival .................. 3.5 Sq. Ft. / 100 MPH
Weight / Ship Wt. ....................... 38 Lbs. / 41 Lbs.
07/31/09
Rev.01
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Summary of Contents for M2 Antenna Systems 10M4DX
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Page 1: Specifications
The 10M4DX was designed for high performance while keeping weight, wind area and costs low. Using computer optimization techniques, we have squeezed for excellent performance on both the CW and phone. The 10M4DX is a great antenna to stack with more 10M4DX Yagis or with other HF antennas. Mechanically, CNC machined aluminum (6061-T6) ring clamps ground the elements to the boom and make assembly a snap. - Page 2 10M4DX ASSEMBLY MANUAL Note: A cup of zinc paste (PENETROX, NOALOX, or equivalent) has been provided to enhance the quality of all the electrical joints in this antenna. Apply a thin coat wherever two pieces of aluminum come in contact PARTICULARLY IN THE .DRIVEN ELEMENT MATCHING ASSEMBLY.
- Page 3 10M4DX ASSEMBLY MANUAL 8. To prepare the overhead guy system, begin by temporarily installing a 2” U-bolt through the TURNBUCKLE PLATE and into the top set of 2” U-bolt holes on the boom to mast plate. Add a couple of 5/16” nuts to hold it in place. UNSCREW the turnbuckle eyes / hooks until only a thread or two shows inside the turnbuckle body and hook them to turnbuckle plate.
- Page 4 10M4DX DIMENSION SHEET...
- Page 5 D.E. & PARASITIC ELEMENT DETAIL...
- Page 6 GENERIC COMPRESSION CLAMP DETAIL...
- Page 7 ELEMENT TIP SECTION 1/2” X .049 X SEE DIMENSION SHEET ..8 FIBERGLASS INSULATOR 7/8” X 15” ROD ..........1 BALUN, 1:1 3-30 MHZ ................1 STRAP, BALUN, FOR 10M4DX 1/2 X .050 X 4” ALUM......2 HAIRPIN TUBE 3/8 X 24” ................. 2 RING CLAMP, 2” ..................4 BOOM TO MAST PLATE, 4”...
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