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Barrett 912 Manual

Singlewire broadband dipole antenna - 125 w
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BARRETT
912 Singlewire broadband dipole antenna - 125 W
P/N BC91201
BARRETT 912 Single Wire Broadband Dipoles are ideal for base stations that require operation on
multiple frequencies through out the HF spectrum using a single antenna. The 912 single wire
broadband P/N BC 91201, can be mounted either in a horizontal or inverted 'V' configuration as
illustrated in the following diagrams. In the horizontal configuration the minimum distance between
the masts is 49 metres and the recommended mast height is 15 metres.
In locations with limited space the antenna can be mounted with the ends past the load resistors
drooped down towards the ground. White nylon supports located just past the load resistors are
provided to attach halyards for this configuration. In this configuration the minimum distance
between masts is reduced to 33 metres.
BCM91201/4

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Summary of Contents for Barrett 912

  • Page 1 912 Singlewire broadband dipole antenna - 125 W P/N BC91201 BARRETT 912 Single Wire Broadband Dipoles are ideal for base stations that require operation on multiple frequencies through out the HF spectrum using a single antenna. The 912 single wire broadband P/N BC 91201, can be mounted either in a horizontal or inverted 'V' configuration as illustrated in the following diagrams.
  • Page 2 BARRETT 912 Singlewire broadband dipole antenna - 125 W P/N BC91201 In the horizontal configuration the major radiation direction is broadside to the antenna. In the inverted 'V' configuration the recommended mast height is 15 metres and at this height the 2 metre stub masts are each installed at a minimum of 19 metres from the mast base.
  • Page 3 BARRETT 912 Singlewire broadband dipole antenna - 125 W P/N BC91201 In the inverted 'V' configuration the antenna becomes more suitable for NVIS, with radiation being directed at high angles, but omnidirectional around the antenna horizontally. Support towers may be either lattice masts as illustrated, tubular telomasts or other support structures that may be available locally.

  • Page 4: Unpacking Instructions

    BARRETT 912 Singlewire broadband dipole antenna - 125 W P/N BC91201 912 Single Wire ANTENNA UNPACKING INSTRUCTIONS Note: Do not unroll antenna wires until the antenna is onsite in a large area 1. Remove the antenna from the box so that the load resistor hangs downwards below the antenna.

  • Page 5: Horizontal Configuration

    BARRETT 912 Singlewire broadband dipole antenna - 125 W P/N BC91201 HORIZONTAL CONFIGURATION Installation Instruction 1. Unpack the antenna (see unpacking instructions) and lay it out on the ground between two mounting poles. 2. Attach rope to each insulator (one at each end) and slowly hoist between the two mounting points (tower/poles even a tree or to the roof) ensuring the wires do not tangle.
  • Page 6 BARRETT 912 Singlewire broadband dipole antenna - 125 W P/N BC91201 INVERTED “V” CONFIGURATION Installation instructions 1. Unpack the antenna and lay on the ground making sure the wires do not tangle. 2. Attach a hoisting cord to the Balun. Slowly raise to about eye level ensuring that the wires do not tangle.