Specifications

3.0 Description
3.1 Primary Radiator. The primary radiator design consists
of a variety of interchangeable feed systems for wide
ranges of applications. These feed systems are patented
beam shaping prime focus designs with the input/output
ports terminated near the focal point of the reflector.
Construction material is aluminum and/or brass with stain-
less steel fasteners. Each feed system includes a carry-
ing/shipping/storage case and collapsible struts.
3.2 Main Reflector. The Trifold™ reflector assembly is fab-
ricated from aluminum alloy sheet. The reflector assembly is
spun on a precision steel chuck to extremely close toler-
ances. The reflector is then manufactured in three pieces
with the two side pieces being hinged to allow them to swing
inward for stowing and transport. A reinforced aluminum
panel torsion box forms the primary structure of the reflec-
tor assembly. The reflector assembly is mounted to the posi-
tioner via a mounting ring. All fasteners are of stainless or
hot-dipped galvanized steel. Quick release fasteners are
incorporated to assure continuous repeatability during stow-
ing and deployment over many years of use.
3.3 Manual Motorizable Positioner. This heavy duty EL
over AZ positioner supports the 4.5m Trifold™ reflector as-
sembly and mounts to any flat surface, such as roof tops,
concrete slabs, flat bed trailers, etc. Antenna azimuth posi-
tioning is performed by a gear box interfaced to a large
chain driven wheel. Support of the wheel and precision rota-
tion is accomplished via cam followers as guidance. An-
tenna elevation positioning is driven from its 90° stow posi-
tion to 5° of true elevation by a machine screw jack with
aload capacity of 10 tons. An elevation vernier is provided to
read the elevation angle of the reflector assembly. The posi-
tioner is easily upgradeable to motorization at any time.
3.4 Trailer. The trailer assembly is a welded steel structure
that includes four outriggers for maximum stability. The trail-
er is provided with a 2-5/16” ball hitch as a standard.
Optional hitch assemblies are available. Optional storage
boxes are also available for mounting on the trailer assem-
bly.
3.5 Options. Available options include:
Tx Cross-Axis Waveguide Kits Loss
Type 206520-137-1 WM37 (one run) .5 dB
Type 206520-137-2 WR 137 (two runs) .5/.5 dB
Type 206520-75-1 WR75 (one run) .8 dB
Type 206520-75-2 WR75 (two runs) .8/.8 dB
Type MKAPVSI azimuth and elevation motorization kit.
Type PLKPFAP-VSI polarization motorization kit.
Type STWKAP storage box for trailer.
Type TF feed systems - refer to Table 1.
Figure 2. Reflector to Positioner Attachment Detail
5
48” (1219 mm) Dia.
Reflector Mounting
Ring
15.52” Typ.
(394 mm)
3 x ø 0.844”
(21 mm) Thru
16.12”
(409 mm)
22.38”
(568 mm)
0.75” (19 mm)
Lockwasher
Reflector
Mounting Ring
0.75”-10UNC
(19 mm) Hex Nut
0.375”
(9.5 mm)
1.00” (25 mm)
Flatwasher
0.75” (19 mm)
Flatwasher
0.75”-10UNC
(19 mm) Bolt
Reflector Frame
of Andrew Positioner
0.75” (19 mm)
Flatwasher
Convex
Washer