M2 Antenna Systems 6-30LP11, Assembly Manual

1.  The physical balance point of the antenna is about 30” to the rear of the center TOWER BOOM 

joint as shown below.  The DRIVE MAST BRACKET (sold separate), will mount just below the 
MAST PLATE “L” & “R” that bolt on to the OVERHEAD MAST BRACKET (shown below).  

 
2.  Place the MAST PLATE “L” & ‘”R”  and OVERHEAD MAST BRACKET in position and add the 

CRADLES with 1/2” radius and use 3/8-24 x 4” BOLTS  and locknuts as shown. Then insert the 
MAIN MAST OVERHEAD SUPPORT and carefully align the welded top tabs with the boom. 

 
3.  Install the 1/2” FORGED TURNBUCKLES in the top holes in the welded tabs and extend the 

turnbuckle until just one thread shows inside the body. Install 3/8” cable eyes in the turnbuckle 
eyes and also into the welded tabs on the tower/boom itself. Slide two 3/8” cable clips on a cable 
end and route the cable through the turnbuckle,  over the cable eye and back through the two 
clips.  Slide one clip against the cable eye and begin tightening. Then position the second clip 
about 2” from the first and begin tightening it. Alternate back and forth until the clips are very tight 
and have compressed into the cable jacket. Repeat this for the other turnbuckle.  Now go to the 
outer ends of the boom and repeat the process but be sure to pull all the slack out of the cables 
before tightening the clips. 

 
4.  Now begin tensioning the cables by tightening the turnbuckles.  If possible use a forklift or equiv-

alent to lift the whole antenna at the OVERHEAD MAST BRACKET point to determine that the 
cable tension is adequate to maintain a straight boom. Adjust as required. Final adjustment can 
be done once the antenna is installed on the tower. 

6-30LP11 BOOM OVERHEAD SUPPORT