TM 55-1510-220-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.
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