Sirio Antenne SY 27-3, SY 27-4 Installation Manual

SY 27-3SY 27-3

SY 27-3SY 27-3

SY 27-3

CB Base Station Antenna (27 MHz)CB Base Station Antenna (27 MHz)

CB Base Station Antenna (27 MHz)CB Base Station Antenna (27 MHz)

CB Base Station Antenna (27 MHz)

Installation ManualInstallation Manual

Installation ManualInstallation Manual

Installation Manual

B Copyright SIRIO antenne - Technical Data are subjected to change - Printed in ITALY - Rev. 09/07/2010 - Cod. ID098

2.0

3.0

1.2

3.1

4.0

1.1

DESCRIPTION

3 elements Yagi Beam antenna working on 27 MHz band with Gamma Match System. It has been
completely made of anticorodal aluminium and supplied with big section Boom and steel bracket
for the fitting on the support mast. The fixing part with rapid mounting system is made of die-cast
metal to get the maximum strength. Every elements is supplied with jointing sleeves of polythene
for a perfect water-proofing. Its supplied with UHF Female connector.

SPECIFICATIONS

3 Elem. Yagi Beam Antenna

26.1-27.7 MHz @ SWR ≤ 2
50 Ω
Directional
Horizontal

8.5 dBd - 10.65 dBi

≥ 1800 KHz (160 channel)
≤ 1.2

1000 Watts (CW) continuous,
3000 Watts (CW) short time
20 dB
UHF Female

Aluminium, Nylon, Steel
86 N at 150 Km/h / 120 Km/h

0.07 m

2

5740 x 2710 x 100 mm
2710 mm / ∅ 33 mm
5740 mm
∅ 8-12-16 mm
3350 mm
4700 gr
∅ 35-50 mm

Electrical Data

Type :
Frequency Range :
Impedance :
Radiation :
Polarization :
Gain :
Bandwidth @ SWR ≤ 2:
SWR @ res. freq. :
Max Power :

Front to Back Ratio :
Connector :

Mechanical Data

Materials :
Wind Load / Resistance :
Wind surface :
Dimensions (approx) :
Boom Length / Diameter :
Max. element lenght :
Element Diameter :
Turning Radius :
Weight (approx.) :
Mounting Mast :

MOUNTING INSTRUCTIONS

1.0 Assembling of elements

Extract the telescopic elements unstringing the tube ∅ 12 and mount the jointing sleeve fixing the first
section by means of the supplied phillips screw. Assemble the second jointing sleeve, string the top tube ∅
8 together with its PVC cap and fix the end section by your phillips screw.

1.1 Placing of elements on the Boom

See the picture.

1.2 Assembling of elements to the Boom

String the tuning element of Gamma Match on one element of the radator dipole, insert the elements into
the metal support and fix them by using the screws and key supplied.

2.0 Assembling of Gamma Match
Extract the final tube of Gamma Match to the length L1=220 mm and fix without locking the flat end

∅ 12 to the connector by using the supplied nut and washer. Move the tuning element towards the Boom
stringing the end part ∅ 8 of Gamma Match as far as size L=610 mm. Then fix the tuning element by
means of screw and key. Check once again the sizes L and L1, lock the nut on the flat part of Gamma Match
and mount the PVC protection cap.

3.0 Assembling of bracket to the Boom

See the picture.

PLEASE, PAY ATTENTION. THE GREAT LOCKING TORQUE OF NUTS THAT FIX THE
BOOM CAN CAUSE DAMAGE TO THIS LAST ONE.

3.1 Installation to the support tube

See the picture.

4.0 Cable connection

See the picture.

ID098

1.0

HI-QUALITY ANTENNAS MADE IN ITALY