1
Use OF aCOUsTIC PressUre eqUalIzers
Acoustic Pressure Equalizers are only to be used with the standard silver protec-
tion grid DD051.
Do not try to fit APEs on Nose Cone UA0777.
The microphone must be inserted into the APE from the hole opposite to the
O-ring. Push the microphone through the hole gently; apply a small amount
of force when the microphone passes the O-ring and is locked. Never turn the
microphone or the APE, since this may cause a tightening or loosening of the
grid. When positioned correctly, the APE is flush with the diaphragm.
During insertion of the microphone do not place a finger or a palm across the
hole, as air confined in the hole may cause the diaphragm to crack.
When dismounting the APE, use a thumb to press it off. Never turn the micro-
phone or the APE.
1
2
3
1. Correct direction for
mounting and dismounting APE’s.
. The APE must be posi-
tioned so that it is flush
with the diaphragm.
. To avoid separation of
the microphone or tight
ening of the grid, do not
turn the microphone.
Fig. 17. Correct mounting and dismounting of APEs.
Summary of Contents for 4003
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