MFJ Octopus Antenna -2100 Instruction Manual

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MFJ-2100
INSTRUCTION MANUAL
CAUTION: Read All Instructions
Before Operating Equipment
300 Industrial Park Road
Starkville, MS 39759 USA
Tel: 662-323-5869 Fax: 662-323-6551
COPYRIGHT
C
2015 MFJ Enterprises Inc.

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Summary of Contents for MFJ Octopus Antenna MFJ-2100

  • Page 1 MFJ-2100 INSTRUCTION MANUAL CAUTION: Read All Instructions Before Operating Equipment 300 Industrial Park Road Starkville, MS 39759 USA Tel: 662-323-5869 Fax: 662-323-6551 COPYRIGHT 2015 MFJ Enterprises Inc.
  • Page 2 Thank you for purchasing your MFJ-2100 antenna. This antenna is excellent for portable operation. Eight hamstick antenna can be mounted to the MFJ-2100 for operation on four bands. Bands are determined by which hamstick you choose to mount to the bracket. The bracket is completely assembled with balun and is ready for operation once the hamsticks are installed.
  • Page 3 Connecting the Hamsticks Screw the hamsticks into the 3/8x24 connectors on the bracket. Same band hamsticks should be opposite each other. Bands that are close in frequency to one another should be at right angles to each other. For example: 20 and 17 meters should not be mounted directly next to each other. If this is unavoidable, don’t worry, it is only a precaution to prevent interference from one band to another.
  • Page 4 Tuning Tuning is best done with an antenna analyzer such as the MFJ-259. This antenna is basically four dipoles on one feed line. You will tune each band individually by moving the whip of that hamstick in or out of the tip of the antenna. Tune the antenna with all the hamsticks mounted.
  • Page 5 Operation Since each hamstick is on a different angle, the direction the antenna is pointed is also different for each band. The radiation pattern is similar to that of a dipole, perpendicular to the antenna. Null Direction of Energy Direction of Energy Null The power handling capablility of this system is dependent of the power capabilities of the Hamsticks used.
  • Page 6 Replacement parts 610-2400 ADAPTOR, 3/8-24 (1-1/4 L) TO HEX NUT (7755) 720H-1250LF LUG, SOLDER,INT.LOCK, FLAT, 3/8IDX1-1/8 L 463011 1-1/4 BASE Insulator 620-3016 COAX PIGTAIL, 2FT 412-4300 BEAD, FERRITE, .562 X .250 X 1.125, #43 745-2149 CABLE TIE, 4, NYLON 500098 1/4-20X1-1/2 HHMS FT SS 561177 WASHER, LOCK, 1/4 SPLIT, SS...
  • Page 7 6. Wired and tested PC board products are covered by this warranty provided only the wired and tested PC board product is returned. Wired and tested PC boards installed in the owner’s cabinet or connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be returned at the owner’s expense unrepaired.

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