1035930-0001 Revision 2
6-4
Attaching the radio assembly
If you need to change the radio’s polarization, refer to Chapter 8 for instructions.
1.
If the feed horn assembly is disassembled, you must assemble it. Apply silicone grease to the
feed horn O-ring groove. Then place the O-ring in the groove.
2.
Attach the waveguide transition to the feed horn using the six #6-32 sockethead cap screws
and #6 internal tooth lock washers. The feed horn assembly is now complete.
3.
Place the O-ring in O-ring groove in the feed horn assembly mounting flange. See Figure 7.
4.
Attach the feed horn assembly to the RA6-074 transceiver using the four M4 x 20mm screws
and M4 lock washers in the four holes of the feed horn assembly. Using a plastic handle ball
driver long length, 3mm hex, 6-13/64-inch blade length, makes it easier to reach the screws.
5.
Tighten securely.
6.
Place the feed horn/RA6-074 transceiver into the upper mounting bracket and secure with (2)
5/16-18 x 1.00-inch hex bolts, flat washers, and lock washers. Tighten securely. See Fig. 8.
7.
Place the top clamp over the neck of the feed horn and secure with a ¼-20 x 1.00-inch hex
bolt and lock washer on each side. Tighten securely. See Figure 9.
Feed rods
¼-20 x 3.00-inch hex
bolt with hardware
¼-20 x 1.00-inch
hex bolt and M4
lock washer on
both sides
O-ring
Feed Horn
Assembly
M4 x 20mm
screws and
lock washers
RA6-074
transceiver
FIGURE 6
FIGURE 7