Instructions
:
Cubex - MARK II Series
Cubex Co., Inc.
06-03 Rev 9
Pg. 3
If one wishes to assemble the antenna for operation with the Cubex Matching
Transformer, it is recommended that the 15 meter DRIVEN ELEMENT be strung
first and loosely linking the driven element ends together. The 1O and 20 meter
wires are then brought to the same point as they are installed. (Note, If used, the 12
and 17 meter wires can then be added). The transformer can then be installed at
the 15m point and the various driven elements positioned and tensioned
appropriately.
The wire element ends of the 20 meter and 10 meter DRIVEN ELEMENTS have extra long
“fold backs”. These provide the slight added length needed for attachment to the Cubex
Matching Transformer. When all DRIVEN ELEMENTS are terminated separately, this excess
fold back is simply trimmed off and discarded.
3. For REFLECTOR assembly, the procedure is the same as step 2 except that the wire
element ends are simply brought together at the “end kinks”, spliced (recommend “lineman’s
splice” and soldered.
After the 2 element assemblies (Driven and Reflector) have been completed, the boom should
be temporarily supported on a 9 to 10 foot step ladder or lashed to the side of a tower at a
height which will permit the bottom element wires to clear the ground.
WARNING - THE CUBEX SPIDERS HAVE BEEN PRE-SPREAD USING A
MICROMETER FOR PRECISE MEASUREMENT. TO FORCE THE UNITS OPEN PAST
THE ALREADY PRE-DEFINED LIMITS WILL RESULT IN BREAKAGE OF THE CAST
UNITS.
4.
The REFLECTOR assembly, is placed at the end of the boom and the DRIVEN
ELEMENT is placed at the other end of the boom. (8 ft. on standard boom, and 12 ft.
separation on Long Boom option) After the assemblies are in place on the boom they should
be rotated and aligned so that all bottom element wires are parallel to the ground.
Place the BOOM/MAST COUPLER (cast or alum. plate) at the center of the boom. Fasten the
coupler to the boom using the supplied bolts. 2” OD booms require 2 - 2”x5/16” U-bolts with
the HD 3” O.D. boom option requiring 4 - 3”x3/8” U bolts. All U-bolts are secured using, nuts
and lock washers. The bolts should be tightened on the boom sufficiently to preventing rotation
of either with respect to the other.
5. As an aid to lifting the array, an 8 to 10 foot pole or pipe section (GIN POLE) may be
temporarily secured to the mast or tower. The Gin Pole is a pole or pipe that has a small pulley
at the top. Using a strong rope the antenna can be pulled up to the final mounting position by
an assistant with little danger to the tower climber. This will usually facilitate getting the array
up to the top of tower, mast, etc.
The antenna array is then lifted into place on the tower and the boom/mast coupler plate is
secured to the mast using the supplied hardware. The antenna & boom assembly is bolted to
the mast using the supplied U-bolts 2” or 3”. REMINDER: DON’T TAKE CHANCES. USE A
CLIMBING BELT OR SAFETY HARNESS WHILE ON A TOWER. THE LIFE YOU SAVE
COULD BE YOURS!
