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SPECIFICATIONS:
Model ........................................ 12M4DX
Frequency Range ...................... 24.890 To 24.990 MHz
*Gain, (FS) / Over gnd ............... 10.7dBi / 16.4dBi @40'
Front to back .............................. 20 dB Typical
Beamwidth ............................... E=48° / H=58°
Feed type ................................... Hair pin match
Feed Impedance........................ 50 Ohms Unbalanced
Maximum VSWR ....................... 1.2:1
Input Connector ......................... SO-239, Others avl.
FEATURES:
The 12M4DX is a great performer for its size. It was designed for low wind area but rugged and lightweight and it
will save you a bundle on shipping. IT'S UPSABLE! like all our "DX" series. The computer optimized design allows full
band coverage with good gain and front to back. Performance is excellent on both the CW and phone. 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. The 12M4DX is also
great for stacking, providing 3 dB increased gain not to mention the lower angle of radiation. The 12M4DX is a perfect
stacking partner for our other "DX series Yagis like the 20M4DX and 10M4DX. Put the 12M4DX to the test in the new cy-
cle!
M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
M2 Antenna Systems, Inc.
Model No: 12M4DX
*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 ..................... 27' / 2"
Element Length / Dia. ................ 21.25' / 7/8" To 1/2"
Turning Radius: ......................... 16' 8"
Stacking Distance ...................... 35' To 41'
Mast Size ................................... 2" to 3 " Nom.
Wind area / Survival .................. 4.4 Sq. Ft. / 100 MPH
Weight / Ship Wt. ....................... 28 Lbs. / 39 Lbs.
01/14/14
Rev.02
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Related Manuals for M2 Antenna Systems 12M4DX
Summary of Contents for M2 Antenna Systems 12M4DX
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Page 1: Specifications
3 dB increased gain not to mention the lower angle of radiation. The 12M4DX is a perfect stacking partner for our other “DX series Yagis like the 20M4DX and 10M4DX. Put the 12M4DX to the test in the new cy- cle! M2 Antenna Systems, Inc. - Page 2 12M4DX 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. It also works well to prevent the stainless nuts from galling on the bolt threads.
- Page 3 12M4DX ASSEMBLY MANUAL 9. HAIRPIN ASSEMBLY: Place the HAIRPIN TUBES into the clamp blocks as shown on the DIMENSION SHEET. Rotate the tubes so the long sections are parallel. Flush the ends with the clamp blocks and tighten the clamp blocks down enough to hold this position. Install the 1/4-20 x 1/4” set screws into each end of the SHORTING BAR and slide the bar onto the tubes to the dimension shown on the DIMENSION SHEET.
- Page 4 12M4DX DIMENSION SHEET...
- Page 5 GENERIC COMPRESSION CLAMP DETAIL...
- Page 6 12M4DX PARTS & HARDWARE DESCRIPTION Boom section #1, 2” x 0.065 x 84” swaged one end ......... 1 Boom section #2 & 3, 2” x 0.065 x 84” swaged one end ......2 Boom section #4, 2" x 0.065 x 84” straight ..........1 Element section, center 1”...
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