Ultra Beam UB640-VL2.3 User manual

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“LOOP ELEMENT” MANUAL
UB640-VL1.1 / UB640-VL1.3 / UB640-VL2.3 / UB640-VL3.4
Rev. 1.10

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VERTICAL LOOP ELEMENTS ASSEMBLY
Th s manual refers exclus vely to the element assembly procedures of vert cal loop employed n
models UB640-VL1.3 - UB640-VL2.3 - UB640-VL3.4.
All other nstruct ons for the mount ng of the antenna s conta ned n the manual "Standard".
The VL2.3 and VL3.4 models have dual dr ver, you w ll need to download the "Sw tch" manual for
nstruct ons about connect ng the electron c sw tch and coax al cables.
Vert cal loop d agram
The manual conta ns the nstruct ons for the complete assembly of a folded loop element.
The procedures are the same for all loops regardless of be ng dr ver-operated or be ng just a
pass ve element.
It w ll be suff c ent to perform the nstallat on on the boom n the pos t on nd cated by the "antenna
pattern" of your model.
ABS collar up
gu de pvc tube
f berglass rod
ABS collar down

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1) SUPPORT ASSEMBLY OF LOWER LOOP ELEMENTS
The lower element of the loop s supported by an alum n um square sect on 60x60mm
placed d rectly below the motor un t.
It s f xed to the boom by means of two alum n um plates "A" (f g.1)
Assemble the plates to the s des of the boom w th 6 M6-bolts
Insert the "B” square sect on to form a T, t ghten the tube so that t rema ns n place.
Check w th a set square to obta n a 90 ° angle (F gure 2) and t ghten all bolts.
The plates w ll behave l ke a clamp and w ll ma nta n stab l ty of the ent re lower support.
F g.1
F g.3 F g.2
The lower elements of the loop are nstalled on a plate s m lar to the motor supports (f g.3)
Install the alum n um support at the lower end of sect on "B" (f g.2). Check angle 90 °
before t ghten ng the bolts.
Install the res n glass tube "C" w th exactly the same procedure as used at the motor
un ts (See "Standard" manual).
C Support w ll keep the lower elements perfectly parallel to the upper ones, f xed to the motor
un t.
90°
B
A
C

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2) INSTALLATION OF MOTOR UNITS AND SUPPORT GUYS
Install the motor un t on the support by follow ng nstruct ons manual "Standard".
F x the alum n um U holder (f g.4) above the ABS collars by means of the two bolts M6 x
120mm ncluded n the screws k t.
Install the vert cal st ck on the U support (F gure 5) and secure t us ng the two M6
bolts. F g. A shows the sect onal v ew of the correct al gnment of the parts nclud ng the
rope.
F g.
4
F g.
5
TIGHTENING BOLTS
Thread Description Clamping Nm
M6 Plates A (f g.1) 17 Nm
M6 Plates elements support lower
(f g.2)
10 Nm
M6 ABS collars lower tube (f g.3) 8 Nm
M6 Support “U” bolts (f g.4) 8 Nm
M6 St ck rope bolts (f g.5) 8 Nm

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motor
un t
A
3) PREPARATION AND GUIDE TUBES
All motor un ts of the vert cal loop elements requ re the nstallat on of nternal gu de tubes n
the upper elements connected to the motor un t "A"
The gu de tube on folded elements s essent al so that the tape can sl de w th n the
curve and along the lower element
The gu de element s composed of two sect ons of PVC p pe 2 x 1500mm total length 3 meters.
Jo n the two PVC sect ons and tape w th common nsulat ng tape.
Insert another junct on at one end, th s w ll be helpful to connect the gu de tube to the motor
un t (F g.1-2).
Insert the gu de tube nto the prev ously assembled element (F gure 3)
F g.1 F g.2 F g.3
Internal PVC guide tube junct on junct on
tape
tape
tape

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4) ELEMENTS INSTALLATION ON MOTOR UNIT
Before nsert ng the elements nto the motor un t, t s necessary to f x the PVC gu de
tube. Dur ng th s operat on t s necessary that the elements rema n al gned to the motor,
f your mount ng set-up does not allow th s, t s absolutely requ red to ga n ass stance by
a second person to hold the support element dur ng the nsert on of the gu de tube.
Ins de the PVC p pe, wh ch s go ng nto the eng ne, a double-s ded adhes ve has been appl ed that w ll
keep the junct on steady and avo d ts detachment (F gure 4)
Place the PVC p pe unt l t reaches ts max mum nsert on (F gure 1)
Place the telescop c element n the motor un t unt l t stops and t ghten the clamp of rubber sleeve.
F g.1 F g.2 F g.3
Important note:
You need to carefully and correctly nstall the gu de tubes.
In case of poss ble detachment of even a s ngle tube, the copper tape w ll bend nev tably
damag ng the motor dr ve funct onal ty.
F g.4

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5) LOWER ELEMENTS ASSEMBLY
Install the lower elements on the lower support just l ke on a motor un t.
In F g.1 the scheme of the pos t on and placement of the elements nto f berglass tube
mounted on the support s d splayed.
Insert the element 10 cm and lock t w th the outer bands of rubber sleeves.
6) SUPPORT ROPES INSTALLATION
The str ngs are attached to the elements by means of two spec al ABS collars (f g.2) placed n the central
junct on of the telescop c element, to th s junct on the thermos-shr nk ng tub ng does not apply.
Place two o r ng elemens as shown n f g.3-4
Close the two ABS shells by means of M4 screws (F gure 5). Eeven closed, the ABS holder w ll rotate on
tself, th s s normal, the nternal notch placed between the two o r ngs w ll prevent t from sl pp ng nward.
F g.2 F g.3 F g.4 F g.5
support C
F g.
A
B

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The two collars A and B are jo ned by a f berglass rod (f g.6) that mechan cally b nds the upper to the lower
element, th s s necessary to ma nta n the un form geometry of the loop and at the same t me t d str butes the
str ng support to the lower element.
The f berglass rod s f xed to the supports by means of one of the 4 lock ng bolts (page 9 - f g. C)
NOTE: As ment oned n the "Standard" manual, there may ex st small d fferences n length between the
elements and then between the junct ons, for th s reason t can happen that the bottom jo nt B s not perfectly
al gned w th the upper, even f th s s not of great mportance, you can correct the al gnment of the lower
coupl ng by adjust ng the nsert on of the lower element nto the “C” support (page 7-f g.1). The space of 10
cm ns de the tube hold ng of the elements s suff c ent to compensate for any m sal gnment of the lower
support B.
F g.6
7) INSTALLATION LOOP CURVES
The outer loops are f xed, w th h gh mechan cal res stance, by the nternal
adhes ve heat shr nk sleeve.
Insert the sheath nto the element and then nsert the same nto the
PVC 180 °curve (normally enter 8-10 cm).
Sl de the sheath over the jo nts, and heat w th the heat gun
The procedure s the same one used for the telescop c elements.
Note: the surfaces must be cleaned before appl cat on
Before heat ng the sheaths check
the al gnment of the loop n order to avo d a candy
shape (aesthet cs factor).
After the appl cat on t s necessary to wa t unt l the
sheath s completely cold.
Tw st ng or movements of the jo nt when st ll warm
and not completely cold can mpa r the mechan cal
seal and the waterproof of the jo nt.
A
B

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8) ROPE MOUNTS
F g.7
F g.8
A MastrAnt P k t of ropes of su table length s prov ded for the construct on of the t e rods.
T e the rope to the r ght and left C supports through the double junct on eyelet (F gure 7)
Then s mply attach the rope (one sect on) to the alum n um st ck placed on the motor un t (f g.8). Cut
of the excess rope from one of the two C supports only when the correct length has been obta ned.
The elements must not look up, the correct tens on of the str ngs s g ven by the al gnment of the C
supports (f g.9) wh ch must not be h gher than the motor dr ve tube
A possible downward trend is recommended, deal to al gn the loops w th the same ncl nat on of
normal elements (no loops) of your antenna (F gure 10)
Three holes n the st ck w ll allow you a small f nal correct on to the tens on of the str ngs w thout
remov ng the rope from the junct on.
F g.10
C
F g.9 C
C
Natural ncl nat on telescop c
element Ideal ncl nat on loop
element

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VL-SERIES ANTENNA DIAGRAM
r 2
1
Dr v
e
Dr ver