
5. HF CLAMP PLATE PAIR ASSEMBLY
Locate the 8 element clamp plates, the Balun ‘L’-Bracket, 2-1/2” U-bolt & Saddle, and element clamp cap.
Assemble the plates into four pairs with the radii facing each other using four 1/4-20 x 2” bolts. On one of the
‘alike’-pair combinations, attach the Balun ‘L’-Bracket to the outside clamp plate with the flat side up and higher
than the plates. Install the 2-1/2” U-bolt & Saddle combination on the top side of the ‘L’-Bracket and add the
5/16” nuts and lockwashers. This assembly will be used for the FRONT DRIVEN ELEMENT. Finger tighten all
the hardware.
6. FRONT AND REAR DRIVEN ELEMENT ASSEMBLY
Take the element clamp plate pair assembly for the FRONT DRIVEN ELEMENT (previous step) and one of the
‘alike’ element clamp pairs, and for both insert a 7/8 x 14-3/4” fiberglass rod through the plates. Orient the four
holes up and make sure the rod is centered. Tighten the four bolts evenly on the clamp plates. Locate the four
7/8” poly disc insulators. Slide a poly disc onto both ends of each 7/8” fiberglass rod and position them right up
against the element clamp plates. They are supposed to be tight so if the discs won’t fit onto the rod, try soaking
them in HOT water for a few minutes. Locate four of the 1 x 72” SOE (swaged one end) tubes. Select two to be
used for the FRONT DRIVEN ELEMENT. Locate the two ‘T’-match shorting bars and slide one about 2 feet onto
each of the straight ends of the 1” tubes you have selected. The other pair of 1 x 72” SOE tubes will be for the
REAR DRIVEN ELEMENT. For all four 1” tubes, slide the straight ends on both sides of the two fiberglass rods.
Align the holes, insert two 1/4-20 x 2” bolts up through the bottom, and temporarily lay the two assemblies flat.
Locate the eight 3/8” clamp blocks.
Spread a little Penetrox on each clamp
block face. Slide two clamp blocks with
their faces towards one another onto the
1/4-20 bolt posts on each element
assembly and thread on the 1/4-20
locknuts. Do not tighten the locknuts at
this time.
7. REFLECTOR, AND DIRECTOR #1
INNER SECTION ASSEMBLY
Locate the remaining four 1 x 72” SOE
(swaged one end) tube sections and the
two 7/8 x 36” aluminum center sleeves.
With the two remaining pairs of element
clamp plates, insert a 7/8” center sleeve
and slide onto both sides of the sleeve, a 1
x 72” tube section. Align the two holes
and secure with 1/4-20 x 1-1/2” bolts and
locknuts. Orient the tubes so that the
locknuts are down and centered. Tighten
the 1/4-20 hardware evenly. A gap
between the two tube sections is normal.
8. BOOM ASSEMBLY
Prior to assembling the boom, inspect each mating surface and holes for any metal chips or burrs. Apply a light
coating of PENETROX to the swaged ends of each piece. Using the DIMENSION SHEET as a guide, lay out
the three 3” pieces as shown. Note that the single straight section is the FRONT end of the antenna. Now
assemble the boom and secure the pieces together with 1/4-20 x 3-1/2” bolts and locknuts. Tighten until no
movement is felt at each joint.
9. ELEMENT INSTALLATION
We advise that you elevate the antenna boom onto a couple of sawhorses or bucks for the remaining assembly
steps. Use the DIMENSION SHEET as a guide to properly install the elements onto the boom. If you have not
labeled which side of the element faces towards the front of the antenna, you will want to pay close attention to
the DIMENSION SHEET. In fact, you might want to label them now. You also might want to have a friend handy
to keep the antenna from moving on you.
Place the REFLECTOR ELEMENT onto the boom in the orientation shown on the DIMENSION SHEET. Set the
outside edge of the element clamp plate 2-1/2” from the rear of the boom. Locate two 3” saddles, apply
zinc paste or grease to the threads and insert two 1/4-20 x 3” bolts through each of the holes. Next attach the
two saddles to the underside of the element clamp plates, and lightly tighten the entire assembly, so the element
won’t move. Using a tape measure hooked to the outside edge of the clamp plate facing the rear, mark off the
KT34M2 ASSEMBLY MANUAL