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Page Title: Item 9. Radio Set AN/ARC-73(*), Vhf Communications
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Item 8. Radio Set AN/ARC-51X, or AN/ARC-51BX, Uhf Communications (Continued)
RATINGS
PROCEDURE
GREEN
AMBER
RED
Set the pilot's and copilot's C-
1611(*)/ AIC for uhf communication.
Turn Control C-4677/ARC-51X or C-
6287/ARC51BX to TR. Set to
frequency of local uhf station.
Establish two-way communication
from pilot's and copilot's position, in
turn. After communication check,
tune to an unused channel and check
squelch.
Item 9. Radio Set AN/ARC-73(*), Vhf Communications
RATINGS
PROCEDURE
GREEN
AMBER
RED
Note: Do not transmit on emergency
Received and transmitted signals
No sidetone heard.
No reliable two-way communication possible
vhf frequency of 121.5 megacycles.
heard in pilot's and copilot's
Reliable two-way
from either position.
Set the pilot's and copilot's C-
headsets and strength and
communication possible
1611(*)/AIC for vhf communication.
readability of signals are adequate
from one position
Set the vhf control unit to the
to maintain two-way
only(pilot's and copilot's).
frequency of a local vhf station and
communications at each position
Squelch inoperative.
establish two-way communication
(pilot's and copilot's). Squelch
from the pilot's position and then
operative. Sidetone heard in
from the copilot's position. After
headsets.
communication check, tune to an
unused channel and check squelch.
9
TM 11-11 20-209-ESC

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