MOUNTING INSTRUCTIONS
DESCRIPTION
5/8
λ
Ground 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
λ
Ground Plane
Frequency Range
:
135-175 MHz tunable by cutting
Impedance
:
50
Ω
Unbalanced
Radiation (H-plane)
:
360
o
Omnidirectional
Radiation (E-plane)
:
Beamwidth at -3 dB = 69
o
Radiation angle deg.
:
25
o
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 m
2
Height (approx.)
:
1335 mm
Weight (approx.)
:
585 gr
Mounting Mast
:
∅
25-30 mm
ID238
