DESCRIPTION
DESCRIPTION
ID388
HI-QUALITY ANTENNAS MADE IN ITALY
Dual band VHF vehicular antenna working on 47...63 MHz and 135...175 MHz by means of the
attached cutting diagram. Its bottom coil allows very good impedance adjustment and its conic
stainless steel whip is very flexible. All the metallic components are made of chromed brass or
stainless steel for the best robustness and it can be supplied with "S" or "SL" professional mounts.
It’s available with magnet mount MAG 125 for temporary installation on th vehicle.
SPECIFICATIONS
SPECIFICATIONS
Electrical Data
Type
: 1/4
l
Base Loaded for 47...63 MHz band
: 5/8
l
for 135...175 MHz band
Frequency Range
: from 47 to 63 MHz & from 135 to 175 MHz tunable by cutting
Impedance
: 50
W
Radiation :
Omnidirectional
Polarization
: Linear Vertical
Gain
: 0 dB ref. to a
l
/4 whip for 47...63 MHz band
: 2 dB ref. to a
l
/4 whip for 135...175 MHz band
Bandwidth @ SWR
£
1.5
:
³
2.5 MHz @ 47 MHz
:
³
3 MHz @ 135 MHz
SWR @ res. freq.
:
£
1.4 for 47...63 MHz band
:
£
1.2 for 135...175 MHz band
Max Power
: 100 Watts
Standard Mount
: “S”, mounting hole
Æ
19 mm, cable 5m RG 58
Alternative Mount
: “SL”, mounting hole
Æ
19 mm, cable 5m RG 58
Mechanical Data
Materials
: Stainless Steel, Nylon,Chromed Brass
Height (approx.)
: 1505 mm
Weight (approx.)
: 280 gr
TUNING INSTRUCTIONS
TUNING INSTRUCTIONS
L
NOTE:
!
Use the curves just as a guide. For fine-tuning please use an SWR-Meter.
TYPICAL S.W.R. RESPONSE
Model: SKA 47/135
S.W.R.
1.0
1.2
1.8
1.4
2.2
1.6
2.0
2.4
2.6
2.8
3.0
133
135
137
f.(MHz)
File: F-14-030
TYPICAL S.W.R. RESPONSE
Model: SKA 47/135
S.W.R.
1.0
1.2
1.8
1.4
2.2
1.6
2.0
2.4
2.6
2.8
3.0
45.5
47
48.5
f.(MHz)
File: F-14-030
