for the opposite side. Continue installing Shaft Retainers until all elements are locked in place.
6. Mount the DRIVEN ELEMENT FEED BLOCK to the boom using a single 8-32 screw 1/4" longer
than the boom diameter. Orient with feed and balun connectors oriented as shown on the
Dimension Sheet.
7. Thread a 3/8” SEAL-NUT fully onto each balun connector on the feed block, with black Neoprene
side facing out. Generally the balun is installed in one long loop. Rear mounted baluns may be
coiled once if length extends beyond boom. Attach balun to the block connectors and tighten
gently
using a 7/16" end wrench. Then back the Seal Nuts out and finger-tighten firmly up against the face
of the connectors (or tighten
gently
with 1/2" end wrench). Form the balun coax close to the boom
and secure with cable ties (snug but not crushing or kinking the coax).
8. Install the 8-32 x 1/4” set screws (internal Allen head - tool supplied) into the SHORTING BARS.
Slide the bars onto the 3/16” rod driven element tips and the 1/4" Feed Block Rods. Position the
Shorting Bars as specified on the DIMENSION SHEET: the distance given is between the outer
face of the Feed Block and the inner face of the Shorting Bar. Align the bars and rods with each
other and tighten the setscrews.
9. For center mounted antennas, the boom to mast plate is normally mounted as close as possible to
the balance point (with feedline or a temporary equivalent attached). For rear mounted antennas,
use the boom length provided behind the reflector element. Keep mounting plate at least 1" from
any element. Secure plate with two U-bolts and the stainless nuts and lock washers provided. DO
NOT OVER TIGHTEN. Additional U-bolts and stainless nuts / lockwashers are provided for
mounting the antenna to your mast. THIS COMPLETES THE ANTENNA ASSEMBLY.
10. For optimum performance, mount antenna high and in the clear.
Always
use high quality coax and
connectors. Old, corroded, or poor quality materials can SERIOUSLY affect VSWR, gain, and
pattern. If possible, test the antenna, connectors and feedline BEFORE installation. At 6' in height,
the antenna will exhibit performance
approaching
the specifications. If it doesn't, check feedline
and connectors for continuity and shorts. Check antenna shorting bars, element placement and
length, against Dimension Sheet.
11. MOUNTING AND STACKING INFORMATION
Rear mounted antennas
can generally be mounted in any polarization to any type of mast,
conductive or non-conductive.
Center mounted antennas
can also be mounted in any polarity.
However, a mast or
crossboom in-line (parallel) with the element plane must be non-conductive.
Anything
conductive in the element plane will disrupt the pattern and reduce performance (even the feedline).
When a non-conductive mast or crossboom is in-line with elements, route feedline away at right
angles to the elements and reattach at least 6" beyond element tips. Fiberglass is the
recommended material for a non-conductive mast or crossboom because of it's strength and
weather resistance.
Stacking:
See the Dimension Sheet for stacking separation dimensions.
1. All driven element blocks MUST be oriented to the same side of boom.
2. All boom-to-mast plates MUST be mounted at the same point on the boom.
3. Feed / phasing lines MUST be of equal electrical length or, ideally, multiples of 1 wavelength in
order to maintain equal phasing in the array.
Carefully manufactured by:
M
2
ANTENNA SYSTEMS, INC.
4402 N. Selland Ave.
Fresno, CA 93722
(559) 432-8873 Fax: 432-3059
www.m2inc.com
Email:
432-6WL ASSEMBLY MANUAL
Summary of Contents for 432-6WL
Page 4: ...432 6WL DIMENSION SHEET...
