Step-11. Boom-To-Mast Assembly: Use the parts listed below to mount the antenna
onto its support mast. Remember to position the antenna with the elements and MN6B
junction box underneath the boom – and confirm all trap drain holes face the ground!
[ ] 2 5/16-18 x 2-1/8" x 3-1/4" U-bolt
[ ] 4 5/16" split lock washer
[ ] 4 5/16-18 Hex nut
Boom-to-Mast Detail (top view)
Boom
Boom-to-Mast Plate
5/16" Lockwasher (4)
5/16" x 18 Nut (4)
Center of Gravity
Mast
5/16" x 2-1/8" x 3-1/4" (2)
U-bolt
In Case of Trouble: The MA6B should exhibit low in-band SWR readings. If the lowest
(minimum) SWR reading you can measure on any band is over 1.5:1, or if the minimum
SWR reading occurs outside the band, check the potential causes listed below:
[ ] Antenna too close to ground, metal roof, house wiring, gutters, foil-insulation, etc.
[ ] Antenna too close to other horizontally polarized antennas tuned to the same bands.
[ ] X-hats or elements tips in contact with leaves or branches.
[ ] Element length or spacing error.
[ ] Water in traps.
[ ] Contaminated coax, shorted or open connector, loose PL-258.
[ ] Unsecured hardware on the elements.
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