V33070-CL
VTM-99-008
3
2.0 FUNCTIONAL DESCRIPTION
2.1
General
The V33070-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 1700 kHz
bands for marine and aeronautical radio beacon and broadcast communication systems.
2.2
Electrical Description
The Valcom, Model V33070-CL2 is a field proven, coil loaded, 74-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
Top and Third Sections.
These are hollow tapered cylinders 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 hemispherical corona ball and at the bottom to a threaded
female ferrule into which the next section is secured. The surface 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 top and third sections. 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 30 kV.
NOTE
:
The sections of the antenna cannot be interchanged with other antennas due
to the unique locations of the locking screw holes.