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M2 Antenna Systems 40M3C Manual

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SPECIFICATIONS:
Model ......................................... 40M3C
Frequency Range ....................... 7.0-7.3 MHz x 150 kHz
Typical gain ................................ 7.2 dBi typical
Front to back ratio ...................... 24 dB typical
Beamwidth ............................... 74°
Feed type ................................... HAIR PIN /1:1 Balun
Feed Impedance. ....................... 50 Ohms
VSWR ......................................... 1.3:1 typical, 2.0:1 max
FEATURES:
The new 40M3C is a new exciting antenna.
core. The result is a lightweight inductor with great power handling and a Q near 1000. The coil has a weather cover
made from polyethylene protecting the coil from birds, weather and snow build up. This allows for an almost lossless
REDUCED SIZE element. Countless hours have been spent optimizing all of our 40 meter antennas using this new coil
technique. The 40M3C uses simple element tip adjustments for optimizing performance for any part of the 40M band in
150 kHz steps. The 40M3C uses all of the same high quality hardware and machine parts that all of customers have
come to know. The 40M3C also has an optional 17m add on kit that uses a single feed point for both 40M and 17M. Don't
miss the best part of the cycle, contact M2 for some help today.
M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
M2 Antenna Systems, Inc.
Model No: 40M3C
*Subtract 2.14 from dBi for dBd / FS = Free Space
2
M
engineers developed a new coil using 3/16" copper wire with an aluminum
Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com
©2018 M2 Antenna Systems Incorporated
Connector ................................... SO-239, Other avl.
Power Handling .......................... 3 KW PEP, Higher avl.
Boom Length / Dia ...................... 30' / 3" X .125
Maximum Element Length .......... 49'
Turning Radius: .......................... 28.5'
Mast Size .................................... 2" or 3" Nom.
Wind area / Survival ................... 13.0 Sq. Ft. / 100 MPH
1/19/19
REV 2

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Summary of Contents for M2 Antenna Systems 40M3C

  • Page 1 150 kHz steps. The 40M3C uses all of the same high quality hardware and machine parts that all of customers have come to know. The 40M3C also has an optional 17m add on kit that uses a single feed point for both 40M and 17M. Don’t miss the best part of the cycle, contact M2 for some help today.
  • Page 2 40M3C ANTENNA OVERVIEW BEFORE YOU BEGIN: Look over all the DRAWINGS to get familiar with the various parts and assem- blies in the system. Tools handy for assembly process: screwdriver, 11/32”, 7/16”, 1/2”, 9/16” and 5/8” spin-tites, end wrenches and/or sockets, and a measuring tape.
  • Page 3 40M ELEMENT HALF OVERVIEW ELEMENT SECTION #3 ELEMENT SECTION #1 (M2AEP40MC-3) (M2AEP40MC-1) ELEMENT TIP (SAEL40MCDD) LENGTH VARIES ELEMENT SECTION #2 DEPENDING (M2AEP40MC-2) ON ELEMENT INSIDE ELEMENT SECTION #1 ELEMENT SECTION #4 (M2AEP40MC-4) ELEMENT SECTION #6 BOLT, (M2AEP40MC-6) 1/4-20 X 2” ELEMENT SECTION #5 &...
  • Page 4 40M COIL OVERVIEW BOOM ELEMENT TIP ELEMENT SECTION #4 40M COIL COIL INSULATOR ELEMENT SECTION #6 (M2AEP40MC-4) (M2ACA1550) (M2AFG0050) (M2AEP40MC-6) COIL POST COIL END CAP COIL SUPPORT (M2ACA1551) (M2ACA1552) (M2ACA1554) (QTY 2) (QTY 2) NOTE: COVER REMOVED FOR ILLUSTRATION PURPOSES.
  • Page 5 40M COIL ASSEMBLY INSTRUCTIONS STEP 1: The coil comes wound tight with 16 total turns from the factory. The excess material will be trimmed off after the coil is in its final position. Using a permanent marker, draw a straight line from one end of the coil to the other. This will help later to determine if your coil has grown in diameter during assembly.
  • Page 6 40M COIL ASSEMBLY INSTRUCTIONS COIL POST STEP 7: ELEMENT SEC- (M2ACA1551) The second COIL POST is mounted on the OP- TION #4 SCREW, 8-32 X 1-1/4” POSITE SIDE of the COIL INSULATOR so 15 1/2 turns of SET SCREW, 1/4-20 X 1/4” the COIL are used.
  • Page 7 40M3C BOOM ASSEMBLY INSTRUCTIONS STEP 11: SCREW, 1/4-20 X 3-1/2” At this point it will be helpful to perform the remaining LOCKNUT, 1/4-20 assembly steps with the BOOM ASSEMBLY elevated off the ground (about 3 feet). This can be accomplished by using sawhorses or something similar.
  • Page 8 40M3C ELEMENT MOUNT ASSEMBLY INSTRUCTIONS ELEMENT MOUNT ASSEMBLY REFECTOR OR DIRECTOR VERTICAL RISER ASSEMBLY (M2AVR0010) ELEMENT CENTER SPLICE STEP 13: (M2ASR0050) Assemble the ELEMENT MOUNT assemblies for the reflector and front director BOLT, 1/4-20 X 3-1/2” element. Refer to the assembly drawing to aid in AND LOCKNUT assembly.
  • Page 9 40M3C ELEMENT FINAL ASSEMBLY INSTRUCTIONS USE 3/16 THIMBLE AND TIE KNOTS USE LOCK BLOCK ROPE SEE DIAGRAM ROUTING DETAIL SEE DIAGRAM ELEMENT SECTION #3 ELEMENT TIP COIL ASSEMBLY (M2AEP40MC-3) (SAEL40MCDD) LENGTH VARIES DEPENDING ELEMENT SECTION #1 ELEMENT SECTION #2 ELEMENT SECTION #5...
  • Page 10 40M3C ASSEMBLY DETAIL ELEMENT ASSEMBLY REFLECTOR OR DIRECTOR ELEMENT USE 3/16 THIMBLE AND TIE KNOTS AND TAPE SEE DIAGRAM VERTICAL RISER ASSEMBLY (M2AVR0010) BOLT, 1/4-20 X 2-1/2” BOLT, 1/4-20 X 3-1/2” LOCKNUT, 1/4-20 AND LOCKNUT (QTY 4) (QTY 2) BOLT, 1/4-20 X 2”...
  • Page 11 40M3C HAIR PIN AND BALUN ASSEMBLY INSTRUCTIONS STEP 22: Refer to the dimension sheet for element placement. With the boom elevated on sawhorses or equivalent, using a long tape measure and a permanent marker lay the boom out by marking the centers of each element. Equalize the amount of extra boom at both ends on the antenna.
  • Page 12 40M3C DIMENSION SHEET REFLECTOR ELEMENT 1/2 TIP SEE CHART ELEMENT TIP LENGTH CHART- EXSPOSED DIMENSIONS 7.0 TO 7.160 7.1TO 7.250 7.16 TO 7.300 RELECTOR 52.50” 47.50” 45.50” DRIVEN ELE 39.50” 35.50” 33.00” DIRECTOR 1 34.50” 30.50” 28.50” 204.00” 187” HAIR PIN SHORT 55.00”...
  • Page 13 GENERIC COMPRESSION CLAMP DETAIL...
  • Page 14 LOCK BLOCK AND KNOT DETAIL LOCK BLOCK ROPE ROUT DETAIL After final adjustments of knots and lock blocks, use electrical tape to tape the excess rope down to the main rope as prevention for rope slippage.
  • Page 15 40M3C PARTS & HARDWARE DESCRIPTION BOOM SECTION #1,#4, 3.0” X .065” X 95”, SOE (M2ABS40M3C-1-4) .................. 2 BOOM SECTION #2, 3.0” X .125” X 95” (M2ABS40M3C-2) ....................1 BOOM SECTION #3, 3.0” X .125” X 95” SOE (M2ABS40M3C-3) ................... 1 ELEMENT SECTION #1: 1-1/2”...