Piper Cherokee Six Service Manual page 655

PIPER CHEROKEE SIX SERVICE MANUAL
a. Remove the access plate on the right side of the fuselage aft of sta. 259.30.
b. Tune the aircraft communications receiver to 121.5 MHz and switch the receiver
ON: deactivate the squelch, and turn the receiver volume up until a slight background noise
is heard.
NOTE
If the aircraft is not fitted with a communications receiver,
request that the tower listen for your test.
c. On the transmitter, set the ON/ARM/OFF switch to the ON position. Keep the
switch in this position for only a few seconds; then set to the OFF position. Return to the
ARM position.
NOTE
The test transmission should have been picked up by the
aircraft communications
receiver and/or control tower.
During cold weather, there may be a slight delay before
transmission occurs.
d. A transmitter which is functioning properly should emit a characteristic downward
swept tone.
e. When the test is completed, ascertain the transmitter ON/ARM/OFF switch is in the
ARM position.
f.
Place the access panel on the right side of the fuselage aft of sta. 259.30.
WARNING
Whenever the unit is checked by moving the transmitter
ON/ARM/OFF switch from the ARM to the ON position, it
must then be moved to the OFF position before reverting to
the ARM position again.
CAUTION
Under normal conditions, the transmitter switch must be set
to arm.
NOTE
Inspect the external whip antenna for any damage. Avoid
bending the whip. Any sharply bent or kinked whip should
be replaced. Antenna damage may cause structural failure of
whip inflight.
ELECTRONICS
Revised: 6/18/76
3F13