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6M7JHV ASSEMBLY MANUAL
TOOLS REQUIRED: Phillips screwdriver, 11/32 wrench, socket or spintite, a 7/16" and 1/2" wrench or
socket, tape measure.
1. Layout the boom sections as shown on Dimension Sheet and assemble with 8-32 x 1-3/4" screws,
lockwashers and nuts. Tighten the nuts securely.
2. Use the Dimension Sheet as reference for installing the ELEMENT HALVES on to the ELEMENT
MOUNTING BLOCKS. For each element insert a 1/4 x 10" Element Support Rod from the drilled end.
Secure the rod / element assemblies to the element mounting blocks with the 8-32 x 1" screws and
locknuts. Install screws from bottom of blocks.
3. Mount the longest element (REFLECTOR) to the hole at the rear end of the boom using a 8-32 x 2-
1/4" screw and locknut. Tighten securely.
4. Mount the DRIVEN ELEMENT next, threading the 8-32 x 2" screw into the 'T' MATCH BLOCK held
to the underside of the boom. Orient the match block with the "N" feed connector pointed to the front.
5. Mount the remaining DIRECTOR ELEMENTS using the element lengths specified on the
Dimension Sheet. The dimensions taper in this design.
6. Thread the gold SEAL NUTS all the way onto the two small connectors on the 'T' match block with
the black neoprene side out. Then connect the balun connectors and tighten them GENTLY
with a 7/16" end wrench. Now run the seal nuts up against the face of the balun connectors and
tighten them about 1/2 turn with a 1/2" end wrench. Secure coiled balun to boom with two nylon ties.
7. Install two 8-32 x 1/4" Setscrews into each SHORTING BAR. Then slide a SHORTING BAR onto
each DRIVEN ELEMENT HALF and position per the dimension sheet. Align rods and element halves
parallel and tighten the set screws with the 5/64" Allen wrench provided. NOTE: The half wave length
balun does not have to be coiled up to work. It can be uncoiled and run along the boom backwards or
preferably forward to move its weight more toward the center of the boom.
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