| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-219-14-9
4-46.3. LOUD HAILER - MAINTENANCE INSTRUCTIONS (Continued).
(b) Quick operational check. A condensed listing of the above test are given below. The particular test,
the control settings for the test, and the normal operation to be expected are arranged in columnar form. IF
desired this table may be used as a check off list for performing the simple operational test at any time.
TEST
CONTROL SETTING
NORMAL OPERATION
Normal speech into micro-
Volume control below
Clear undistorted
phone outdoors.
maximum setting.
reproduction.
Less than maximum
volume.
Normal speech into micro-
Volume control at
Clear undistorted
phone outdoors.
maximum setting.
reproduction.
Full volume re-
produced.
Normal speech into micro-
Volume control at
Loud hailer feeds
phone, horn pointed at a
maximum setting.
back and howls.
hard wall.
Normal speech into micro-
Volume control
Howling stops well
phone, horn pointed at a
backed off.
before volume con-
hard wall.
trol reaches min-
imum setting.
Speech reproduc-
tion at lower
volume than
maximum but clear
and undistorted.
4-1176
|
||
|
||
