6.9
-
4CDD
-
125 ASSEMBLY INSTRUCTIONS
STEP 24
Insert PHASING LINES into THE PHASE LINE CLAMP
BLOCK. Attach the balun leads to each side under the nuts that tight-
en the phase line clamps.
STEP 25
Installing a temporary mast while the antenna is still on the
ground will help set up the main boom overhead support rope to
ease installation on the tower. Find a
2”
x
84”
pcs. of tubing and in-
stall it to the boom to mast plate as shown in the boom to mast plate
hardware arrangement. See the dimension sheet for antenna bal-
ance point. Add the turn buckle plate about
12”
to
24”
above the BTM
plate. Find the
5/16”
Dacron rope and tie each end to the eye bolt
( see the knot diagram) at each end of the boom. Cut the rope leav-
ing equal lengths of rope past the mast on each side. Pull the rope
tight, and tie each end to the turnbuckles leaving as little slack as
possible. Now loosen the U
-
bolt and raise the turnbuckle plate until
the boom straightens. Let this stay tight for at lest overnight allowing
the rope to stretch and take a set. Be sure to tape the rope ends
down to the tensioned side of the rope to prevent knots from coming
loose.
STEP 26
Before tower installation be sure to check all hardware for
tightness, check all elements overhead rope supports for tight knots
and review the droop of each element, adjust as needed. Loosen the
turnbuckle plate and lower the plate releasing tension from the ropes.
Remove the turnbuckles from the turnbuckle plate and tape them to
the boom for easy access during tower installation. After final installa-
tion be sure to safety wire the turnbuckles to avoid the turnbuckles
from loosening while under vibration. Be sure to use good quality
coax with a quality connectors for final installation.
2”
U
-
BOLT
&CRADLE
(QTY 1)
TURNBUCKLE
3/8 H&E
(QTY 2)
TURNBUCKLE PLATE
ARANGEMENT
TURNBUCKLE PLATE
(M2APT0110)
3”
HD U
-
BOLT
&CRADLE
(QTY 2)
2”
HD U
-
BOLT
&CRADLE
(QTY 4)
BTM PLATE
(M2APT0070)
BOOM TO MAST PLATE
HARDWARE
ARANGEMENT
4:1 BALUN LEADS
ATTACH TO
EACH SIDE OF THE
FRONT
DRIVEN
ELEMENT
