Valcom V147-CL2, Operation And Installation Instructions Manual

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V147-CL2
VTM-04-006A
3
2.0 FUNCTIONAL DESCRIPTION
2.1 General
The V147-CL2 is intended to be used as part of an overall communication system which
consists of a transmitter (or receiver or transceiver), an antenna coupler and the antenna.
It is used around the world in many applications with requirements in the 100 kHz to
5000 kHz bands for marine and aeronautical radio beacon and, with Top-Hat radials, as a
Traveler Information Service (TIS) communication systems.
2.2 Electrical Description
The Valcom, Model V147-CL2 is a field proven, coil loaded, 49-foot antenna. The
second section is inductively loaded to a resonant frequency slightly higher than the
operating frequency specified by the customer.
2.3 Mechanical Description
Third Section.
This is a hollow tapered cylinder made of circumferentially and
longitudinally wound fibreglass filaments using a thermosetting epoxy resin matrix.
Embedded in the composite are multiple beryllium copper strips laid in a single-turn
spiral and secured at the top end to a threaded female ferrule into which the Valcosphere
is secured. Depending on the options chosen, there may be up to eight whiskers that
thread into the Valcosphere ferrule to form the Top-Hat structure. The surface of the
section is smoothed, primed and painted with a polyamide epoxy surface coating.
Coil Loaded Section (Second Section)
The coil loaded section is constructed in the
same manner as the Third section. The coil is wound using enamel copper wire and is
also embedded in the fiberglass. The ends of the coil are braised to the respective
ferrules.
Bottom Section. The construction and finish are the same as for the other sections
except that the diameter expands out to meet the mounting base. The ferrule is threaded
to fit into the bottom of the Coil Loaded section. Multiple parallel conductors are
connected to the ferrule at the top and to a conducting ring near the bottom. The feed
terminal extends from the bottom ring to the surface of the antenna approximately 18.0
inches from the bottom of the base flange. The base can withstand a flash-over voltage of
25 kV.
NOTE : The sections of the antenna cannot be interchanged with other antennas
due to the unique locations of the locking screw holes.