TM 11-5985-371-12&P
GUY STAKE. Four 18-inch (45.7 cm) metal stakes anchor the guys in the ground.
One spare guy stake is provided. A fastener, which is permanently attached to the
top of the stake, connects to the adjustable fastener on the guy.
GROUND ROD AND GROUNDING CABLE. The ground rod is identical to the ground rods
used for the antenna stakes
and the safety area rope stakes
,, but it is fur-
nished with a clamp and a grounding cable. (See illustration on page 2-19. )
BALUN ASSEMBLY. A 50-ohm to 600-ohm balun (impedance matching transformer)
including a mounting assembly is attached to the mast 6.5 feet (2 meters) from the
mast base.
RF CABLE ASSEMBLY. Two 100-foot (30.5 meter) rf cable assemblies are provided
to connect the radio transmitter or receiver to the antenna. A cable adapter is
.
furnished to connect two cables together.
SAFETY AREA ROPE STAKE. Six safety area rope stakes (identical to the antenna
stakes, item
support the safety area rope.
SAFETY AREA ROPE. A 300-foot (91.5 meter) roll of nylon rope and a 100-foot
(30.5 meter) roll of nylon rope are provided to enclose the radiation hazardous area
of the antenna. The two rolls must be tied together to form a 400-foot (122 meter)
rope.
CAUTION PLATE. Eight rf radiation hazard plates are attached to the safety area
rope when the antenna is used for transmitting.
WARNING STRIPS. The warning strips are furnished in two, rolls, one of which is
3/4 inch (1.91 cm) wide, and the other is 2 inches (5.08 cm) wide, and are made of
international orange, fluorescent nylon webbing.
1-11. Components of Antenna AS-3577/GRC.
a. Components of Antenna AS-3577/GRC. Components of the AS-3577/GRC are iden-
tified and illustrated in paragraph 1-10. Items 1, 2, 9, 10, 11, and 12 are com-
ponents of the AB-86/GRA-4 which are also components of the AS-3577/GRC. In addi-
tion; the AS-3577/GRC includes a sledge hammer, a 100-foot tape measure, a tool kit
for installation and maintenance, and a carrying case. Refer to appendix F for
details.
b. Components of Antenna Mast Assembly AB-86/GRA-4. Components of the
illustrated in TM 11-2651. The following components
AB-86/GRA-4 are described and
which are part of the AB-86/GRA-4 are not furnished when the AB-86/GRA-4 is part of
Antenna AS-3577/GRC:
(1) Antenna Adapter MX-857/GRA-4
(2) Counterpoise CP-12
(3) Wire W-128
1-12. Equipment Data.
a. Technical Characteristics
Frequency range . . . . . . . . . . . . 2-30 MHZ
Radiation pattern . . . . . . . . . . . Omnidirectional
1-6
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