TM 9-4935-294-15/2
Note. To install the male connector contacts, follow the
Caution. To install the male connector con-
applicable procedures outlined in g (2) (a) below.
tacts, follow the applicable procedures out-
(4) Install male contact 19 (refer to 13, fig. 4-23)
lined in g (2) (a) below.
on brown harness (helix) lead.
(5) Install male connector contacts 7 and 16 on
(4) Install male connector contact 19 (refer to 16,
yellow harness (heater) leads.
(6) Remove coaxial cable connector from C-band
(5) Install male connector contacts 7 and 16 on
BWO tube (12, fig. 4-20) to coaxial directional coupler
yellow harness (heater) leads.
(14).
(6) Place C-band tube (12, fig. 4-20) in proper
(7) It stall coaxial cable connector from X-band
position within rf head chassis (42) and aline tube
BWO tube (10) on coaxial directional coupler (17).
brackets with mounting holes. Insert four mounting
(8) Place X-band BWO tube (10) in proper position
screws (13) through the chassis into the mounting
within rf head chassis (42) and aline tube brackets with
brackets. Do not tighten at this time as tube must be
mounting holes. Insert four mounting screws (11)
free to move.
through the rf head chassis (42) into the mounting
(7) Connect and solder red harness lead to
brackets. Do not tighten at this time as tube must be
terminal 2 on C-band dispersion PC board assembly
free to move.
(refer to 1, fig. 4-23).
(9) Connect coaxial table connector on C-band
(8) Install C-band connector bracket assembly (5,
BWO tube (12) to C-band coaxial directional coupler
(14).
and secure.
(10) Connect and solder the red harness (anode)
(9) Aline BWO tube brackets with mounting holes
lead to terminal 2 on X-band dispersion PC board
in rf head chassis (42),
apply sealing compound
assembly (refer to 1, fig. 4-23).
A10528558 to the mounting screws and secure.
(11) Install X-band connector bracket assembly (3,
(10) Connect and solder the green, orange, and
blue harness leads to connector bracket assembly (5)
(12) Aline BWO tube brackets with the mounting
solder lug (refer to 16, fig. 4-23).
holes in rf head chassis (42), apply sealing compound
(11) Install coaxial cable connector on C-band
A10528558 to the mounting screws and secure.
directional coupler 14, fig. 4-20).
(13) Connect and solder the green, orange, and
(12) Install clamp (6) around C-band harness,
blue harness leads to connector bracket assembly (3)
insert screw (4) through rf head chassis (42) and clamp
solder lug (refer to 16, fig. 4-23).
(6) and secure with flat washer (9), lockwasher (8) and
(14) Install clamp (6, fig. 4-20) around X-band
hex nut (7) in that order.
harness, insert screw (4) through rf head chassis (42)
(13) Install side cover (1) and attach with 10
and clamp (6) and secure with flat washer (9),
screws (2).
lockwasher (8) and hex nut (7) in that order.
d. Replacement of X-Band BWO Tube 792110.
(15) Install side cover (1) and attach with 10
(1) Obtain replacement BWO tube, unpack and
screws (2).
inspect for possible shipping and/or handling damage. If
e. Disassembly of C- and X-Band Rf Head.
BWO tube is in satisfactory condition, proceed with the
To disassemble the C- and X-band rf head completely,
installation. Perform installation procedures in a location
follow order of removal shown in exploded view, figure
free from possible magnetic fields. Use a work surface
that is non-magnetic.
21 or 4-22. For disassembly and assembly of the
(2) Remove protective cover from the output
connector bracket assemblies and counter assemblies
connector.
refer to e and f, respectively, below.
(3) Obtain three replacement male connector
f. Assembly of C- and X-Band Rf Head. To
contacts 7923076. Obtain installation and crimping tool
assemble the C- and X-band rf head, refer
7919871.
Change 1 4-35
