The 905 Tactical HF Antenna Series provides a short, medium and long range HF skywave capability for transportable radio stations in one compact package.

The kit can be deployed in either a Wideband Terminated Dipole mode for 2 to 30 MHz omni-directional coverage or in a Sloping Vee mode for 8 to 30 MHz directional point-to-point communications.

In the Wideband Dipole mode (up to 12MHz) the antenna produces an omni-directional, high angle radiation characteristic which is ideal for short-to-medium range combat net radio applications. At the higher frequencies (above 12MHz) the angle of vertical radiation decreases and the horizontal pattern tends to become bi-directional like the horizontal dipole.

In the Sloping Vee mode the antenna produces a low angle, narrow beam radiation characteristic over a frequency range of 8 to 30 MHz, the vertical take-off angle varying from 40° at 8 MHz to 18° at 30 MHz. This vertical pattern is ideal for medium-to-long range, point-to-point working.

Available in four power options of 150W, 400W, 500W or 1kW PEP.  The antennas are designed to be supported at heights of between 8 and 15 metres and so can be used with Racal’s lightweight telescopic mast series (model 716) or the 9 metre sectionalised fibreglass mast (model 675).  Other convenient supports may also be used.  In the case of the 905-916 (100 metre legs) it is recommended that the 15 metre Intermediate Duty Mast (model 457) and grounding kit be used.

The wire kit includes terylene/copper braid radiating elements, a balun transformer, terminating resistors, support cord and steel ground anchors. Also supplied is a coaxial cable assembly terminated with N type connectors and fitted with a strain relief sleeve.