Non directional beacon pdf

Different numbers of windings on the loading coil determine the different operating frequency ranges. Mechanical The antenna is a self-supporting mast antenna. It is made of glass-fibre reinforced plastic and consists of three different sections: Lower Mast section Loading Coil Assembly Top Rod Assembly The lower section is an 8 m or 5 m long conical tube.

It carries the top load assembly consisting of loading coil and top rods. The RF feed insulators, external and baseinjected ones, are carefully designed in order to avoid instable antenna impedances. The base-injection runs concentrically into the mast tube. It is held by small supports of good dielectric constant. On top of the lower section mast tube a joint armature carries the top load assembly.

This joint The top capacitance ring being tightened to the top joint armature by a second retaining hex nut pos. Four capacitance rods STA 30 D pos. They have a metric thread on their junction armature with which they are screwed to the top capacitance ring.

Additional locking screws pos. It eases not only the first installation, but saves also avoidable costs later when the antenna must be laid down for maintenance or at extreme weather conditions e. The erection of the antenna can be Take care - that the antenna tilts into the approximate direction of the feeder wire, if possible.

Otherwise, the feeder wire had to be detached before each tilting operation. Uploaded by Fazi Imi. Did you find this document useful?

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