Tools handy for assembly process: screwdriver,
11/32”
spin
-
tite or socket,
7/16”
and
1/2”
end wrenches
and/or sockets, measuring tape.
1.
Assemble the boom sections using the 8
-
32 X 1
-
1/4 screws and locknuts.
2.
Lay out the elements by length and position as shown the DIMENSION sheet. Start with the
REFLECTOR (longest) element. Balance on finger to find rough center and push on a black button
insulator to about
1/2”
from center. Install the element through the holes at the boom and push on the
second button, snugging it up into boom. DO NOT BOTHER WITH ACCURATELY CENTERING the
element at this time and DO NOT INSTALL the stainless steel SHAFT RETAINERS yet. This is easier
to do after all the elements are installed in the boom.
3.
Install the
3/16”
rod DRIVEN ELEMENT as you did the reflector. Then continue with the installation of
the DIRECTORS.
4.
Now begin centering the elements. Use a tape measure to EQUALIZE the the element length on
each side of the boom. Once you have all the elements centered, sight down the element tips from
the rear comparing each side. Look for any obvious discrepancies and correct if found.
5.
Begin installing the stainless SHAFT RETAINER to one side of the element. Use thumb and index
finger to hold a retainer over end of the 3/8 x
3”
push tube (chamfer inner edge of tube) (retainer
dished into tube). Hold the element firmly and start the retainer onto the rod by applying pressure with
the push tube. Push the retainer until up tight against the button insulator (Locking pliers,
lightly
clamped up against opposite button insulator will help maintain center reference and keep you from
pushing the first retainer too far). It is a good idea to install the second SHAFT RETAINER after final
testing.
6.
Mount the DRIVEN ELEMENTASSEMBLY to the underside of the boom using a single 8
-
32 X 1
-
1/4"
screw. Orient the block with feed connector facing forward and balun connectors facing to rear. Block
orientation may be reversed if you wish feedline to exit rear of boom.
7.
Attach balun to the DRIVEN ELEMENT ASSEMBLY and tighten the connectors
gently
using a 7/16"
end wrench. Coil balun once, if necessary, so balun does not extend beyond end of boom. Form the
balun close to the boom and secure with a nylon cable tie, snug but not crushing or kinking the coax.
2M7X ASSEMBLY MANUAL
Summary of Contents for 2M7X
Page 3: ...2M7X DIMENSION SHEET ...
