Sirio Antenne GP 3-F User manual

TYPICAL TUNING DIAGRAMS
Model GP 3-FGP 3-F
GP 3-FGP 3-F
GP 3-F
VHF Base Station Antenna 135-175 MHzVHF Base Station Antenna 135-175 MHz
VHF Base Station Antenna 135-175 MHzVHF Base Station Antenna 135-175 MHz
VHF Base Station Antenna 135-175 MHz
Installation ManualInstallation Manual
Installation ManualInstallation Manual
Installation Manual
BCopyright SIRIO antenne - Technical Data are subjected to change - Printed in ITALY - Rev. 01/07/1998- Cod. ID238
NOTE:
• It is recommended to use the curves as a guide and fine-tune using an SWR-Meter.

MOUNTING INSTRUCTIONSDESCRIPTION
5/8 λGround Plane base station antenna for land and marine service. It works on the frequency
range of 135-175 MHz by using the cutting diagram enclosed. The matching coil is DC feeded
for a perfect protection from the static discharges. GP 3-F is made of fiber-glass and assembled
on a very strong base of chromed die-cast metal to get the maximum robustness and the best
performance. Tuning is easy by following the attached directions.
SPECIFICATIONS
Electrical Data
Type : 5/8 λGround Plane
Frequency Range : 135-175 MHz tunable by cutting
Impedance : 50 ΩUnbalanced
Radiation (H-plane) : 360oOmnidirectional
Radiation (E-plane) : Beamwidth at -3 dB = 69o
Radiation angle deg. : 25o
Polarization : Vertical
Gain : 1.5 dBd - 3.65 dBi
Bandwidth at V.S.W.R. 2:1 : 4.8 MHz at 135 MHz
V.S.W.R. at res. freq. : ≤1.2 : 1 at 135 MHz
Max Power : 200 Watts
Feed System / Position : Transformer DC-Ground / Base
Connection : UHF Female
Mechanical Data
Materials : Glass Fibre, Nylon, Chromed Brass
Wind Load / Resistance : 23 N at 150 Km/h / 150 Km/h
Wind Surface : 0.02 m2
Height (approx.) : 1335 mm
Weight (approx.) : 585 gr
Mounting Mast : ∅25-30 mm
ID238