NOTE: THE “DIMENSION SHEET” AND THE “HARDWARE ARRANGEMENT” DRAWINGS ARE
QUITE COMPLETE WITH ASSEMBLY INFORMATION. EXPERIENCED BUILDERS MAY NOT
REQUIRE THE WRITTEN INSTRUCTIONS. WHEN IN DOUBT, USE THE WRITTEN WORD. ANTI-
SEIZE PASTE (PENETROX OR NOALOX) IS RECOMMENDED ON ALL HARDWARE THREADS
AND ALUMINUM JOINTS. TOOLS REQUIRED: Electric drill, screw driver, 11/32" spintite or socket,
7/16" end wrench, 7/16", 1/2", and 9/16" socket set, measuring tape.
1. Determine which CUSTOMIZATION OPTION you prefer by looking over the Specification page and
Plot printouts. USE THIS CHOICE TO SELECT THE CORRECT TIP LENGTHS, ELEMENT
SPACING, AND MATCH SETTING AS YOU COMPLETE THE ANTENNA ASSEMBLY. For ease of
assembly and for future reference, space has been provided on the Dimension Sheet to record all the
critical measurements for the optimization option you select.
2. Pair up 1/2” element tip sections by length. Insert 1/2” sections into the swaged end of the 3/4” x
53” sections secure with 5/8” Compression Clamps (SEE COMPRESSION CLAMP & TIP ASSEMBLY
DETAIL). Set the proper exposed tip length according to the table below. DIMENSIONS GIVEN ARE
FOR 1/2” LENGTHS EXPOSED BEYOND THE 3/4” ENDS.
CW-LO
FONE FULL
BAND
REFL
51.625”
51.625”
D.E. 37.00”
35.25”
D1
36.00”
34.25”
D2
31.50”
30.75”
D3
25.875”
24.00”
Install all tip sections. Use a felt pen and masking tape to identify each element set by position as it is
completed.
3. Slide a 7/8” X 23” EXTERNAL SLEEVE over the butt end of a 3/4" x 53” / 1/2” tip assembly and
align holes. Install this assembly into the end of a 1" x 48” element section with holes at 1/2” and 1-
1/2” from end. Use 8-32 x 1-1/4" screws and locknuts at the joint. Tighten securely. Slide a 7/8” x 32”
SLEEVE SECTION into the butt end of the 1” section and align holes. Attach a 1-1/4” x 48” ELEMENT
SECTION to 1” ELEMENT SECTION using 8-32 x 1-1/2” screws and locknuts. Repeat for all
elements.
4. PARASITIC ELEMENT ASSEMBLY: Slide a 1-1/2” x 30” INNER ELEMENT SECTION onto each
end of a 1-3/8” x 52” CENTER SLEEVE, align holes, and secure with a 1/4-20 x 2” bolt and locknut.
Slide on the second 1-1/2 x 30” section. Align the holes and secure with the second 1/4-20 x 2” bolt
and locknut. Place a clamp plate one either side at the center of this element assembly and rotate so
the bolt heads are up. Add the 1/4-20 x 2-3/4” bolts trough the 6 holes and add the locknuts. Check
the element centering again and then tighten the clamp block bolts evenly to keep the plates parallel.
Repeat for the other two PARASITIC ELEMENTS.
5. DRIVEN ELEMENT ASSEMBLY: Refer to the HARDWARE ARRANGEMENT drawing and
assemble THE LAST pair of ELEMENT CLAMP PLATES including the “L” BRACKET for mounting the
balun. Slide in the 1-1/4” x 24” fiberglass rod, center it, align holes up and down and tighten the clamp
bolts evenly. Now add the white poly rings to each side of the fiberglass rod and push them up against
the clamp plates. Insert the 1-/38” x 26” sleeves into the last two 1-1/2 x 30” SOE tubes. Align the
holes and carefully slide these assemblies over the fiberglass rod ends. Align all the holes and, FROM
THE BOTTOM, insert two 1/4-20 x 2-1/2” bolts. Drop on two HAIRPIN CLAMP BLOCKS and add a
locknut finger tight to each bolt.
20M5-125 ASSEMBLY MANUAL
