AR 10012510, Operating And Service Manual

Page: 26 / 72

Model 200T8G18A/250T8G18
8 Rev D
3.2.2 Mounting
The TWTA may be operated as a standalone bench top unit, or it may be installed in a 19" rack.
If rack mounting is desired, first remove the amplifier from the cabinet, then install the amplifier in the rack..
NOTE: Due to the weight of the unit, the lifting and removal of the amplifier from the cabinet is an operation
requiring two people.
Before removal disconnect power, RF and any other interface connectors. On the rear of the unit, remove any
screws used to connect transport brackets to amplifier (two on each bracket). Reinstall screws in holes in
chassis. On the front of the unit, remove the four screws (two outside screws on each side) mounting the front
panel to the cabinet. Carefully slide the amplifier out of the front of the cabinet.
CAUTION:
Never rack mount the TWTA using the front panel alone. The chassis is
likely to be damaged unless its weight is supported. Bottom support rails
must be provided in a rack mount configuration.
See Figure 3-1 (below) for the locations of threaded holes which may be used for supplementary support of
the rear of the TWTA for transport. Screws installed in these threaded holes may be removed and replaced
with screws of appropriate length to thread 3/8 - 5/8 inch into the TWTA chassis.
Figure 3-1. Rear view of HPA
For rack mount installation of multiple units, the units should be separated vertically by at least 1 3/4 inches.
This will allow room for necessary support rails and facilitate installation and removal of the units.