Sirio Antenne SD 27 Dipole - Base Station Antenna 27 MHz Manual

DESCRIPTION

1/2 Dipole antenna working on 27 MHz band with Gamma Match System. It has been completely made of anticorodal aluminium and supplied with 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 and robustness. The radial whip is earthed and it is supplied with jointing sleeves of polythene for a perfect water-proofing. Its supplied with UHF Female connector.

SPECIFICATIONS

Electrical Data

Type	Dipole
Frequency Range	26-28 MHz
Impedance	50
Radiation	Horizontal mounting Directional
	Vertical mounting Omnidirectional
Polarization	Linear Horizontal
Gain	0 dBd - 2.15 dBi
Bandwidth @ SWR d 2	3780 KHz (340 channel)
SWR @ res. freq.	1.1
Max Power	1000 Watts (CW) continuous, 3000 Watts (CW) short time
Connector	UHF-female

Mechanical Data

Materials	Aluminium, Nylon, Steel
Wind Load / Resistance	80 N at 150 Km/h / 130 Km/h
Wind surface	0.07 m 2
Dimensions (approx)	5420 x 1380 x 100 mm
Boom Length / Diameter	1380 mm / 33 mm
Max. element lenght	5420 mm
Element Diameter	8-12-16 mm
Turning Radius	3050 mm
Weight (approx.)	2560 gr
Mounting Mast	35-50 mm

MOUNTING INSTRUCTIONS

1. 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. Placing of elements on the Boom
      See the picture.
      
   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. Assembling of Gamma Match
   Extract the final tube of Gamma Match to the length L1=485 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=890 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. 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.
   
   1. Installation to the support tube
      See the picture.
      
4. Cable connection
   See the picture.
   

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