KUM121 Active HF Antenna

KUM121 Active HF Antenna



KUM121 Active HF Antenna

Marine and Land Based MF/HF Active Antenna. Receive Only
Com., weather fax and positioning data. N239F. Packed in a tube
The antenna is an omnidirectional HF/SSB active receive antenna. It has an integrated
amplifier, RF and DC are both diode-protected. The high quality makes this antenna
perfect for both leisure and commercial vessels. The antenna is manufactured in
premium quality materials in order to prevent galvanic corrosion. Radiating elements are
made of copper. The antenna is manufactured using crimping technology giving the
antenna a 4-5 times stronger build-up. Fits both 1″ 14TPI and 1 1/4″ 11 TPI threads. It
has the same rugged design as all other AC Antennas products thus it withstands harsh
environmental conditions, both on sea and land


Short description

Product group HF/SSB
Design Active receiving antenna
Pattern Omnidirectional
Electrical specifications
Frequency range [MHz] 0.15-30
Bandwidth [MHz] 29.85
Max. Input Power [Watt] Receive only
Nominal impedance [Ohm] 50
Supply voltage [V] 9-12
Supply current max. [mA] 35
Output max. [dBm] 10
IP3 [dBm] > +28
IP2 [dBm] > +50
Amplifier Noise figure [8dB] 10
Polarisation Vertical
DC Shorted No
DC Grounded Yes, galvanic isolation on DC supply is
Connector UHF-Female


Mechanical specifications

Length [m/ft] 1.26 / 4.10
Sections 1
Weight [kg/lbs] 0.50 / 1.10
Survival Wind Speed [km/h / m/s / mph] 200 / 45 / 124
Wind Area [m2/ft2] 0.0234 / 0.2519
Wind Load @ 160km/h [N] 34
Material Fibreglass
Colour White
Operating Temperature Range [°C/°F] -40 to +60 / -40 to +140
Ingress Protection IP66
Thread 1″ 14TPI male / 1 1/4″ 11TPI female
Mounting Mounting nut included

Downloads and Links

Case study for replacing traditional 6-meter antennas

Data Sheet


More AC Antennas Products

AC Antenna Website Home Page

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Weight1500 g
Dimensions100 × 100 × 1200 mm


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