After the mechanical assembly has been completed, the plug (5) must be plugged into the
headphone. A noticeable, complete insertion ensures the proper connection to the headphones
- if the plug is not fully inserted, there may be interference / malfuntion in the headphone. The
complete insertion must be checked before each flight - if the plug has loosened it can lead to
malfunctions on the right and / or the left earcup. Finally attach the cables with the Velcro
tape. The velcro should be carried only one layer between the fork and the auricle so that the
auricle can move freely.
Adjustments :
The squelch level
: should be checked in the aircraft and shall be adjusted if necessary .The
micro positioned rather at the angle of the mouth than directly before it. The micro itself has,
like most carbon standard / noise canceling microphones, has a active "TALK" side facing to
the mouth – correct positioning : the white label on the micro indicates the talk-side - and is
directly facing your mouth - or mouth-corner ideally.
Mic output readjustment :
pull back the mics windscreen - and you will see a recessed small
slotted screw. Use a small watchmakers slot-screwdriver: a full 360 deg turn clockwise (
counterclockwise ) will increase (decrease ) the mic-outpout by about 60mV - the trimmer has
a mechanical range of about 12 * full 360 deg turns or electr. appr. 100-800mV linear
adjustment. How to adjust : dial clockwise or counterclockwise ( as needed ) 180 deg and
test, dial another 180 deg and test ... and so on. Preadjustment is about 400mV - which is Ok
for most cases.
