TM 11-5840-360-14-1-1
The end of the X-band waveguide run from the
2.3.4.2 Waveguide Connections. - A waveguide run is
receiver transmitter is terminated with a square flange-
required from the X-band antenna pedestal waveguide
to-round-flange adapter (supplied by Raytheon). This
rotating joint to the waveguide output flange in the X-
adapter is secured to the pedestal by a circular V-clamp
band receiver transmitter.
and threaded bolt assembly. Access to the inside of the
Waveguide (in standard 12-foot lengths) and choke
pedestal is achieved by removing the circular clamp and
and cover flanges are available from Raytheon (see
then unscrewing the captive bottom plate securing
screws. The entire top of the pedestal including the
when assembling waveguide runs in a choke-to-cover
antenna array can then be tilted forward by grasping the
coupling. The choke flange must be positioned to face
handle at the rear of the pedestal top case.
away from the antenna and toward the receiver
Rectangular plastic brackets (see Table 1-5) shall
transmitter along the line of the run.
be used to secure the waveguide run to the mast and to
Coupling flanges must be silver-soldered to the
the wheelhouse structure.
waveguide ends. The following guidelines should be
observed.
2.3.5. Lubrication
1. The waveguide ends and flange walls
Check and, if necessary, lubricate the antenna pedestal
must be chemically cleaned to ensure an efficient bond.
Install the breather plug
2. The finished joint must be smooth and
(supplied in the installation kit) at the filler port.
clean
3. The internal walls must be smoothed and
polished to ensure a continuous contact.
Table 2-5 X-Band Waveguide Components
Part Number for
Part Number for
Description
Large X-Band
Small X-Band
Waveguide RG-51/U
Waveguide RG-52/U
(WR112)
(WR90)
Waveguide, rigid, copper, without flanges,
341-1006P2
341-1006P1
12-foot length
Flange, cover, brass, with clearance holes
341-1004P1
341-101P1
Flange, cover, aluminum, with clearance holes
341-1004P2
341-1011P3
Flange, choke, brass, with 8-32 threaded holes
341-1008P1
341-7174P1
Flange, choke, aluminum with 8-32 threaded holes
341-1008P3
341-7174P3
Waveguide, flexible, with flanges, 24-inch length
341-1009P1
341-7190P1
Elbow, E-bend, 900, brass, with flanges
341-0282G2
341-7191P1
Elbow, H-bend, 900, brass, with flanges
341-0281G1
341-7191P2
Twist, 900, brass, with flanges, 6-inch length
341-0295P5
341-7192P1
Waveguide, elliptical, semi-rigid, aluminum
Not Available
166606-1
Flange, cover, elliptical, aluminum
Not Available
167051-1
Flange, choke, elliptical, aluminum
Not Available
167052-2
Gasket, O-ring
287-1044P1
287-1044P4
Screw, 8-32, 5/8-inch, SST
207-7197P38
207-7197P38
Lockwasher, Number 8
236-1150P4
236-1150P4
Mounting bracket, E-plane, plastic
31T-019G801
Not Available
Mounting bracket, H-plane, plastic
31T-019G802
Not Available
Deck gland
39X-003G801
Not Available
Transition, waveguide, WR90 to WR112
168356-1
168356-1
NOTE - VJR112 parts are available worldwide; TBS - Part No. to be supplied.
2-16
Previous Page
