PROCOM A/S

R 4-3/..., R 4-6/...

DESCRIPTION

  • R 4-3/… is a two-element Yagi antenna with 3 dBd gain. R 4-6/… is a three-element Yagi antenna with 6 dBd gain. Both antenna types are delivered in two versions – one covering the low end of the band ("l") and one covering the high end of the band ("h"), see specifications below.
  • These Yagis incorporate baluns optimized for wide bandwidth and accurate matching. The entire balun unit and feeder cable inlet are completely sealed in a polythene moulding ensuring permanent waterproof connections. The antennas are supplied with a 3 m "tail" of RG 213 terminated with an N-female connector.
  • Radiating elements, supporting booms and adjoining metal castings have been constructed in high quality aluminium alloys to prevent corrosion. All metal parts are DC-grounded.
  • The antennas are designed for back mounting and are provided with rear extended booms. These antennas can be stacked and fed in phase with a matching harness for increased gain. A mast clamp for fixation on 30-58 mm diameter mast tube is enclosed.

R 4-3/...

R 4-6/...

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SPECIFICATIONS

ELECTRICAL
MODEL R 4-3/... R-4-6/...
ANTENNA TYPE 2-element Yagi 3-element Yagi
FREQUENCY l: 66 - 78 MHz
h: 75 - 88 MHz
l: 66 - 76 MHz
h: 75 - 88 MHz
IMPEDANCE Nom. 50 Ω
POLARIZATION Vertical or horizontal
GAIN 5 dBi 3 dBd 8 dBi 6 dBd
FRONT TO BACK RATIO 12 dBd 17 dBd
HALF-POWER BEAMWIDTH E-plane: 75°
H-plane: 150°
E-plane: 70°
H-plane: 120°
BANDWIDTH 13 MHz
SWR ≤ 1.5
MAX. POWER 150 W
ANTISTATIC PROTECTION All metal parts DC-grounded (Connector shows a DC-short)
MECHANICAL  
TEMP. RANGE -25°C → +60°C
CONNECTION 3 m tail of RG 213 terminated with type “N” female connector
WIND SURFACE 0.162 m² 0.203 m²
WIND LOAD 205 N @ 160 km/h 257 N @ 160 km/h
COLOUR “Aluminium”
MATERIALS Elements/Boom/Saddle clamps: Aluminium alloys.
Fittings: Stainless steel.
BOOM LENGTH Approx. 1.6 m Approx. 1.8 m
BOOM DIA. 31.8 mm
MAX. ELEMENT LENGTH Approx. 2.15 m
DIA. OF ELEMENTS 19 mm
WEIGHT Approx. 4.9 kg Approx. 5.3 kg
MOUNTING On 30 - 58 mm dia. mast tube
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TYPICAL RADIATION PATTERN (E-PLANE)

If the antennas are mounted for vertical polarisation these curves show the radiation patterns in the vertical plane.

TYPICAL RADIATION PATTERN (H-PLANE)

If the antennas are mounted for vertical polarisation these curves show the radiation patterns in the horizontal plane (horizontal coverage).
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SpecificationsIn PDF Format
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PROCOM A/S
Smedetoften 12 • DK-3600 Frederikssund • Denmark • Phone: +45 48 27 84 84 • E-mail: info@procom.dk • Owner of Skymasts Antennas