TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
b.
Transmitter selector switch (audio
control panel) - #1 or #2.
c.
Off-volume control - Turn clockwise,
set volume as required.
d.
Frequency selector - Set desired
frequency.
e.
Fly aircraft to a point 40 nautical
miles away from test station.
f.
At 40 nautical miles, maintain
communication with test station
each 10
while flying a 360° flat turn
(not to exceed 5
bank).
Communication should be uniformly
loud and clear through these tests.
g.
Repeat procedure for frequencies in
low, middle, and high ranges.
*7
HF radio set - Check as follows
K10
a.
Transmitter selector switch
(audio control panel) - #4.
b.
Mode selector (HF control
panel) - Set desired operating
mode.
c.
Microphone switch - Press
momentarily and wait for
antenna coupler to tune. A
1000 Hz tone will be heard
in the headphones until tuning
is complete. Tuning time
should not exceed 30 seconds
4-25