Sirio Antenne GPA 66-108 User manual

TYPICAL TUNING DIAGRAMS
Model GPA 66-108GPA 66-108
GPA 66-108GPA 66-108
GPA 66-108
VHF Ground Plane Antenna 66-108 MHzVHF Ground Plane Antenna 66-108 MHz
VHF Ground Plane Antenna 66-108 MHzVHF Ground Plane Antenna 66-108 MHz
VHF Ground Plane Antenna 66-108 MHz
Installation ManualInstallation Manual
Installation ManualInstallation Manual
Installation Manual
BCopyright SIRIO antenne - Technical Data are subjected to change - Printed in ITALY - Rev. 02/07/1998 - Cod. ID176
NOTE:
 It is recommended to use the curves as a guide and fine-tune using an SWR-Meter.

DESCRIPTION
1/4 λ Ground Plane antenna for base station service working on 66-108 MHz by means of the
tuning diagram enclosed. It is entirely made of non-corrosive aluminium and assembled on a
strong die-cast base which allows an easy and safe installation assuring very good performances.
SPECIFICATIONS
Electrical Data
Type : 1/4 λ Ground Plane
Frequency Range : 66-108 MHz tunable by diagram
Impedance : 50 ΩUnbalanced
Radiation (H-plane) : 360oOmnidirectional
Radiation (E-plane) : Beamwidth at -3 dB = 86o
Radiation angle deg. : 0o
Polarization : Vertical
Gain : 0 dBd - 2.14 dBi
Bandwidth at V.S.W.R. 2:1 : 6.5 MHz at 66 MHz
V.S.W.R. at res. freq. : ≤1.2 : 1
Max Power : 500 Watts
Feed System / Position : Direct / Center
Connection : UHF Female
Mechanical Data
Materials : Aluminium, Chromed Brass, Nylon, Stainless Steel
Wind Load / Resistance : 54 N at 150 Km/h / 150 Km/h
Wind Surface : 0.05 m2
Height (approx.) : 1930 mm
Weight (approx.) : 700 gr
Radial Length (approx) : 1080 mm
Mounting Mast : ∅35-40 mm
MOUNTING INSTRUCTIONS
ID176