Telex Echelon 20 User Instructions

User Instructions

Echelon 20
Headset

Telex

®

Page 1

Volume Control

Flexible Boom Permits

Precise Mic Placement

Noise Canceling

Electret Microphone

Earcups Pivot on

Two Planes to

Conform to

Wearer

Patented

Tension

Adjust Knob

(Comfort

Camtm)

Replaceable

Head Pad

Detented Sliders

Adjust to

Any Size Head

Unique
Design

Ball and Socket

Jointed Boom

Rotates

Overhead for

Mic

Placement on

Either

Side of Head

Echelon 20 Reference View

Figure 1

Replaceable

Ear Cushions

The Echelon 20 full cushion aviation headset offers comfort, excellent hearing
protection and value.

Page 2

GENERAL DESCRIPTION

The T elex Echelon 20 is a medium-weight noise-reduction headset with amplified,
noise-canceling, electret microphone.

DESIGN FEATURES

(See Figure 1)

Comfortable foam-filled headband pad and ear cushions. The headband pad evenly
distributes the headset weight with no pressure points, for maximum wearer
comfort. The lightweight ear cushions combine comfort with an excellent acoustic
seal. An outer urethane layer ensures long life. Gel-filled ear cushions are also
available for this headset for users who prefer this type. All cushions are field­replaceable.

Boom Microphone: The boom arm features a sealed ball-and-socket joint and
flexible boom for precise microphone placement on any head size. The boom
rotates overhead for microphone placement on either side of the head. The
microphone cartridge features a noise-canceling electret element. The cartridge
snaps on and off for easy replacement. The microphone amplifier is in the
microphone cartridge. It operates on current supplied by the aircraft radio via the
microphone jack.

Cordage: The microphone cordage is protected inside the boom arm. Shielded
wire throughout the headset protects against RFI and EMI. Strain-reliefs on all
cords provide maximum durability .

Page 3

OPERATION

Headband Pressure Adjustments

There are three pressure settings for headband comfort. Increasing the pressure
will improve the seal between the earcup and the head for greater noise reduction.
T o change the pressure setting, remove the headset and fold the earcup inward
as shown, then rotate the adjustment knob to the desired setting. Repeat for both
earcups. Both sides of the headband should be set to the same pressure setting
to keep the headband properly centered on the head.

Boom Microphone Placement

1. Rotate the entire boom overhead to
wear the microphone on either the
right or left side of the head.

2. For best noise cancelation, position
the microphone as close to the
mouth as possible and speak in a
normal voice. (See figure 3)

3. When the microphone is not in use,
it may be swung slightly away from
the mouth.

HIGH MEDIUM LOW

Figure 2

Figure 3