Omnidirectional Antenna
27 ... 61 MHz
K 51 24 72
936.047/b Subject to alteration.
KATHREIN-Werke KG . Anton-Kathrein-Straße 1 – 3 . P.O. Box 10 04 44 . D-83004 Rosenheim . Germany . Telephone (++49)8031/184-0 . Fax (++49)8031/184-991
dB
78
°
10
3
0
Vertical Pattern
Type No.
Antenna
K 51 24 72
Spare radials
K 51 24 70 1
Input
UHF female
Frequency range
27 ... 61 MHz
Gain (ref.
λ
/
2
dipole)
0 dB
Impedance
50
Ω
Polarization
Vertical
Max. power
500 Watt (at 50 °C ambient temperature)
Weight *
1.6 kg
Wind load *
110 N (at 150 km/h)
Max. wind velocity
135 km/h
Packing size
2704 x 136 x 100 mm
Radiator length
max. 2510 mm
Length of radials
max. 2510 mm
Tunable Fiberglass-Groundplane-Antenna.
DC grounded.
Material:
Radiator and radials: Fiberglass with imbedded
stranded copper wire.
Base: Aluminum.
Mounting U-bolt and all screws and nuts:
Stainless steel.
Mounting:
The antenna can be attached in two ways
with the supplied mounting kit:
1. On the tip of a tubular mast of
40 – 54 mm diameter (connecting cable
runs inside the mast).
2. Laterally at the tip of a tubular mast of
20 – 54 mm diameter (connecting cable
runs outside the mast).
Tuning:
By cutting radiator and radials to length in
accordance to the mounting instructions.
Grounding:
The metal parts of the antenna including
the mounting kit are DC grounded.
* for max. antenna length
Standing Wave Ratio (VSWR)
Examples of matching at various frequencies
2,2
1,8
1,4
1,0
49
50
51
59
60
61
VSWR
2,2
1,8
1,4
1,0
27
27,6
34
34,6
41
41,6
VSWR
On the tip of a
tubular mast
Laterally at the tip of a
tubular mast
