7. HAIRPIN MATCH ASSEMBLY: Refer to the HARDWARE ARRANGEMENT drawing. Insert a 1/4-
20 X 2-1/4” bolt from inside the band clamp and Install the band clamp loosely positioned about 30”
inches in front of the driven element. Mount the BALUN using the 2-1/2” U-bolt and cradle but do not
over tighten. Remove the finger tight nuts over the hairpin clamp blocks and place the balun lead
lugs over the studs and replace the nuts finger tight. Next, slide the short bent end of the 3/8” tubes
into the small hairpin clamp blocks and flush the ends of the tubes with the blocks. Align and tighten
the clamp block bolts lightly. Install the shorting bar on the straight ends of the tubes and add the 1/4
-20 x 1/4” set screws, but do not tighten on to the tubes yet. Set to the proper shorting bar
dimension, align and tighten the set screws securely. Move the band clamp under the shorting bar,
add the 3/8” spacer tube on the stud and drop the shorting bar over the stud and add the locknut.
Tighten the band clamp, and then tighten the nut.
Refer to the DIMENSION SHEET. This dimension is from the inner edge of the shorting bar to the
inner edge of the tube. Install the main feedline or feed line jumper on the 1:1 balun. Tape the
connector up carefully. Use the large cable ties to secure the cable to the boom.
8. INSTALLING THE ELEMENT TIP SECTIONS: Start with the REFLECTOR tip sections and
insert each double wall 1” element butt into the 1-1/4” center sections. align the holes and insert the
8-32 x 1-1/2” screws. Add the locknuts and tighten securely. Continue adding the other tip sections
until the antenna is complete.
9. Determine the BALANCE POINT of the assembled antenna and mount the BOOM TO MAST
PLATE using two 3 inch U-bolts, stainless steel lockwashers and nuts.
10. OVERHEAD BOOM SUPPORT SYSTEM. This antenna is supplied with both outer and inner
overhead support systems. The outer support system uses the supplied wire rope assemblies.
Install turnbuckle plate to your mast at 48”
minimum
from your boom. Before hooking turnbuckles to
turnbuckle plate open turnbuckles until just a thread or two from each end shows inside the
turnbuckle body. Before you continue (SEE WIRE ROPE ASSEMBLY DETAIL SHEET & DIM
SHEET) for more information. Complete wire rope assemblies as shown on wire rope assembly
sheet. Hook turnbuckles to turnbuckle plate & install the other end of wire assemblies to outer set of
holes on the antenna boom (SEE DIM SHEET).
The inner overhead boom support system uses 5/16” Dacron rope & eyebolts (3/8” X 6”). Install
eyebolts to inner eyebolt hole set on antenna boom. Use a 2nd turnbuckle plate and the 2 more
turnbuckles and secure the upper end of the Dacron to your mast (SEE DIM SHEET). Remember to
open turnbuckles until just a thread or two from each end shows inside the turnbuckle body. After
final installation, do any minor boom straightening with the turnbuckles. Cut off any excess over one
foot long. Pull on the knots
HARD
to
SET
then use black vinyl electricians tape and tape excess
cord back to main cord. Seal ends with heat or flame to prevent fraying. Then safety wire to prevent
changes to settings.
11. Install side guy support system. Use supplied Kevlar (1/8” X 120’) and cut as needed to get 4
Kevlar pieces for your side support system (SEE DIMENSION SHEET FOR MORE INFORMATION).
12. THIS COMPLETES THE ASSEMBLY. When the antenna is installed in position on the mast, the
main feedline can be attached and sealed at that time. REMEMBER to support the feedline at the
antenna boom and on the mast. Leave an adequate feedline loop for rotation around the tower.
Mount horizontally polarized VHF and UHF antennas at least 40” above or below this antenna to
minimize interaction.
M
2
ANTENNA SYSTEMS, INC.
4402 N. SELLAND AVE.
FRESNO, CA 93722
(559) 432-8873 FAX:432-3059
www.m2inc.com Email: [email protected]
20M6-125 ASSEMBLY MANUAL
Содержание 20M6-125
Страница 3: ...20M6 125 ASSEMBLY DETAILS...
