CUBEX SKYMASTER III- 3B Manual Download Page 11 | Manualshive

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CUBEX SKYMASTER III- 3B Manual Download Page 11

Instructions

:

Cubex SkyMaster Series

Cubex Co., Inc.

05-06 Rev 0

Pg. 11

TRUSS ARRANGEMENT

3 element Quad ELEMENT Spacing

In the SKYM III and SKYM IV antenna models an appropriate length of high quality UV
resistant Dacron antenna rope is supplied along with necessary eyebolts to complete
the truss guying of the boom. Eyebolts for a 2” mast and 3” boom are supplied and the
boom holes are pre-drill for proper location of the truss line.

18 ft Boom

7’-6”

7’-6”

Eyebolt

48”

Dacron
Antenna
Rope

10’

8’

REFL

DRV

DIR

Bridge Truss Mast Bracket

6M Drvn El

6M D1

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Summary of Contents for SKYMASTER III- 3B

Page 1: ...wearing hard hats to protect them from falling objects such as tools etc Cubex Co Inc has no control over the conditions at the antenna site and therefore can not be held responsible for any damage o...

Page 2: ...reference that orientation The book Cubical Quads Antennas by William Orr and Stuart Cowan is also an excellent source of dimensions and information about quad antennas and is a great addition to you...

Page 3: ...ATION OF WIRE ELEMENTS 4 The wire has been spooled in a relatively large diameter to minimize curl and reduce the chance of kinking The wire bundles are marked for as follows Reflectors Driven Element...

Page 4: ...ked and then lined up on the arms To minimize tangling and unnecessary wire kinks it is recommended that the wire loops be lightly taped along their length prior to removing them from the winding jig...

Page 5: ...der arms one in each of the depressed troughs Be sure to orient the drilled holes now horizontally to facilitate element wire assembly Fasten each spreader arm to the spider using two stainless steel...

Page 6: ...d be sufficient to withstand the greater side loading effects When the rotor is placed inside a tower lengths of 10 feet can be used without trouble as the side loading is absorbed by a tower bearing...

Page 7: ...irectly with 50 ohm cable It is suggested that you try 50 ohm connection first Any excess cable can be coiled and taped together For 12 meters use 79 3 4 inches 202 74 cm of RG 11U cable Where a REMOT...

Page 8: ...cm 15 Meters RG11 U 92 in 233 68 cm 17 Meters Note 3 20 Meters RG 8 U 50 ohm Any length 40 Meters RG11 U 23 35 ft 420 in 711 71 cm Note 1 that any length 50 ohm coax maybe connected to the end of thes...

Page 9: ...161 5 207 25 The total length is 4 X the above dimensions In order to make splices and connections and additional 4 inches must be added to Reflectors and Directors Driven elements need an additional...

Page 10: ...r SWR with either system FEED LINE PRUNING should be attempted as the NUMBER ONE approach when using the SF approach Baluns are generally not needed and have proven effective in only a small percentag...

Page 11: ...ate length of high quality UV resistant Dacron antenna rope is supplied along with necessary eyebolts to complete the truss guying of the boom Eyebolts for a 2 mast and 3 boom are supplied and the boo...

Page 12: ...heck the tension in all of the sides of this element making sure that the arms are square and in line Make an adjustment at the sleeve and if satisfied Crimp or solder the element wire into the sleeve...

Page 13: ...es drilled in the boom The Driven Element RED and the 1st DIR WHT These 6m arms should be centered in the boom and then tighten the Phillips head screw to secure the arm into the boom Be careful to no...

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