Sirio Tornado 27 User Manual
TORNADO 27 5/8
TORNADO 27 5/8
CB Base Station Antenna
DESCRIPTION
DESCRIPTION
5/8 l antenna for base station working on 27 MHz. It is made of anti-corodal aluminium tubes and supplied with
jointing sleeves of polythene to guarantee a perfect waterproofing. Strong and easy to install, it allows very good links.
REMARK Tornado 27 is an antenna that is influenced by the height from
the ground plane where it's installed. Unfortunately it's difficult to give the
correct instructions as the places where antennas could be installed are so
different in sizes and types that's impossible to give the correct way to
mount it. However we suggest to carefully verify the height of your
installation pole in order to avoid too much influence of the ground plane
to the antenna performance. Suggested length of final element for the 27
MHz is L=1120 mm but we recommend to get the fine tuning by checking
with your SWR-meter as the ground plane can highly influence the
performance of your antenna.
SPECIFICATIONS
SPECIFICATIONS
Electrical Data
Type : 5/8 l Ground Plane
Frequency range : 26 - 28 MHz
Impedance : 50 W
Radiation (H-plane) : 360° omnidirectional
Polarization : Linear Vertical
Gain : 1.2 dBd, 3.35 dBi
Bandwidth @ SWR £ 2: ³ 2000 KHz (180 channel)
SWR @ res. freq. : £ 1.2
Max Power : 1000 Watts (CW) continuous
: 3000 Watts (CW) short time
Feed system / position : Transformer / base
Connector : UHF-female
Mechanical Data
Materials : Aluminium, Steel, Nylon
Wind Load / Resistance : 187 N @ 150Km/h / 130 Km/h
Wind surface : 0.16 m
Length (approx.) : 7230 mm
Weigth (approx.) : 2900 gr
Mounting Mast : Æ 35-42 mm
2
HI-QUALITY ANTENNAS MADE IN ITALY
ID039
Parts List
Pos Q.ty Description
1 1 5 sections telescopic aluminium whip
2 5 plastic jointing sleeves (5 different sizes)
3 10 Æ 3.9x12.7 phillips tapping screws
4 5 M4 washers
5 5 Æ 6x8x1170mm aluminium tubes
6 5 M4x4 hexagon socket set screws cup point
7 1 2mm hexagonal key
8 5 PVC cap for Æ 8 mm aluminium tubes
9 1 bottom section assembled with coil and connector
10 4 M6 hexagonal nuts
11 4 M6 spring lock washers
12 4 M6 washers
13 2 steel V brackets
14 2 steel plane brackets
15 2 M6x240 mm U-bolt
MOUNTING INSTRUCTIONSMOUNTING INSTRUCTIONS
Mounting needed tools:
n. 1 tape rules (meter)
n. 1 phillips screwdriver
n. 1 10 mm open key
8
5
11
7
L=1120mm
Insert the PVC cap (8) on
the aluminium tube (5)
then insert the tubes in the
bottom section (9) and
lock they using the screws
(6) and 2mm hexagonal
key (7).
22
9
6
Pull out the sections of
telescopic aluminium whip (1),
insert the jointing sleeves on the
tubes (2) and lock they using the
screws (3) and washers (4).
Insert one of aluminium tube (5)
at L=1120mm and lock it using
the screw (6) and 2 mm
hexagonal key (7). Insert the
PVC cap (8).
NOTE: the L=1120 mm is just the
initial position. For fine-tuning
please use an SWR-meter
2
6
7
Mount the antenna on the mast
using parts (10) (11) (12) (13)
(14) and (15) in according to
the picture.
5
8
33
4
13
1
11
15
3
1
10
14
12
Mast Æ 35-42mm (not supplied)
HI-QUALITY ANTENNAS MADE IN ITALY
B Copyright SIRIO antenne - Technical Data are subjected to change - Printed in ITALY - Rev. 16/10/2008 - Cod. ID039
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