HF360

Sigma HF-360

  • 1-2 Days
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80m - 10m

The HF-360 is an end fed vertical fibreglass antenna capable of allowing the user to work 80 meters through 10 meters using an ATU, also not requiring any counterpoise.
 
 The antenna can be pole mounted at ground level or elevated depending on users requirements. The antenna is rated at 300 watts side band. The antenna comes complete with fixings and full installation guide.
 
 The antenna has 4 sections, 3 high grade fibre glass sections and one stainless steel whip.
  • Type End fed vertical
  • Frequency TX / 3.5 - 29 MHz
  • RX / 1.8 - 55 MHz
  • Power handling 300 watts pep
  • Impedance 50 Ohms
  • Connector SO-239
  • Length 5.4 meters

    How it works:
    The antenna is fed using 50 Ohm coax via a SO-239 socket at the base of the unit. A 6:1 UNUN transformer is located in an IP65 weather sealed box at the bottom of the bracket section of the fibre glass elements. The antenna comes in four parts, three  fibreglass poles and one stainless steel tapered whip. The transformer reduces the impedance at the feed point to a more acceptable level making the antenna much more efficient and allowing proper and easy tuning via an external ATU and automatic ATU’s found in most modern radios.

    The antenna can be grounded if the user experiences excessive local static noise, but as the UNUN is DC grounded, grounding will not affect the tuning ratios.

    The Highlighted bands in the chart below will require a manual ATU, the others an internal ATU.

    BAND         ATU    

    80 m             1:3.1 (Manual ATU)                                    

    60 m              1:1                                                                  

    40 m             1:1                                                                  

    30 m             1:1                                                                 

    20 m             1:1                                                                  

    17 m             1:1   (Manual ATU)                                     

    15 m             1:1                                                                  

    12 m             1:1   (Manual ATU)                                      

    10 m             1:1

    6 m              1:1   (Manual ATU)

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