M2 Antenna Systems 2M5-440XP Manual page 5

2M5-440XP ASSEMBLY MANUAL
6. Mount the 440 MHz DRIVEN ELEMENT BLOCK / ROD ASSEMBLY to the TOP of the boom using a single 8-
32 X 1-1/4" screw and lockwasher. Orient the block with the two balun connectors facing to front, "N"
connector to rear. Reverse for center mounted antenna.
7. Install the 8-32 x 1/4" set screws (internal Allen head - tool supplied) into the SHORTING BARS. Slide the bars
onto the 1/8" Driven Element Block Rods and the 3/16" Driven Element Rods. Position the inner edge of each
Shorting Bar 4-3/8" from the outer edge of the Driven Element Block (see Dimension Sheet). Align the bars
with each other and tighten the set screws.
ASSEMBLING THE 2 METER ELEMENTS
8. Repeat steps #2 through #5 for the 2 meter elements, using the Dimension Sheet as your guide to lengths and
spacing.
9. Mount the 2 Meter Driven Element Block to the left hand side of the boom with the two Balun connectors
oriented to the FRONT, "N" connector to rear. Reverse for center mounted antenna. Secure with 8-32 x 1-1/4"
screw and lockwasher. Install the Shorting Bars as in step #7.
10. Before installing the Baluns, thread 3/8" SEAL NUTS fully onto all connectors, with the black Neoprene face of
the nuts facing out. Attach Baluns to the Driven Element Blocks as shown on the Dimension Sheet. Tighten
the connectors gently using a 7/16" end wrench. Once the connectors are tight, back the Seal Nuts out and
finger-tighten firmly up against the face of the connectors (or tighten gently with 1/2" end wrench). A lot of
torque is unnecessary and will damage seal. Depending on mounting options, a balun may loop around other
elements. This is normal. Form balun coax until it is close to the boom and secure with a nylon cable tie. Also
secure the other balun. Ties should be snug but not crushing or kinking the coax.
REAR MOUNTING
11. The boom to mast plate is mounted at the rear of boom using two 1" U-bolts and the stainless nuts and lock
washers provided. Rotate to desired polarity. DO NOT OVER TIGHTEN. 2" U-bolts are provided for mounting
the antenna to your mast, tower leg, or crossboom.
CENTER MOUNTING
12. Find the balance point and mount the boom to mast plate with the 1" U-bolts. Since one set of elements will be
in the plane of the mast, a non-conductive mast of fiberglass or equivalent is strongly recommended. 2" U-
bolts are provided for mounting the antenna to your mast, tower leg, or crossboom.
13. Use good quality coax and "N" connector for your feedlines. Secure feed coax near connectors with cable ties
to provide stress relief. Then route tight against boom (AVOID TOUCHING THE ELEMENTS WITH THE
FEEDLINES and secure again with ties or black electrical tape at exit point.
THIS COMPLETES THE ANTENNA ASSEMBLY.
2
M
ANTENNA SYSTEMS, INC.
4402 N. Selland Ave.
Fresno, CA 93722
(559) 432-8873 FAX: 432-3059
www.m2inc.com Email: sales@m2inc.com