Telex 5x5 Pro III Manual

Telex Headset 5x5 Pro III

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Technical Data Sheet

Model 5x5 Pro III Headset

Microphone and Amplifier

A noise cancelling, electret element and microphone amplifier are used. The

amplifier receives power from the aircraft radio via the microphone plug. The

amplifier output level is adjustable through an opening in the side of the

amplifier housing. (Adjustment by a qualified avionics technician is

recommended.) For best performance the microphone should be positioned at

the side of the mouth and close to the lower lip.

Wearer Options

The headset features a detachable headband and pivot assembly. The boom

may be rotated over a 180-degree range, permitting the microphone to be

positioned on either side of the head. Alternately, the headband may be

removed, and the headset may be worn on eyeglasses. An eyeglass adapter kit

is supplied with the headset, and can accommodate wire or plastic eyeglass

bows. The headset may also be worn with a custom earmold (not supplied).

The microphone boom may be positioned on either side of the head when

using eyeglasses or a custom earmold.

Comfort

The headband consists of two stainless-steel springs covered with soft,

polypropylene webbing. The springs are bendable to adjust the lateral

pressure on the head. Also, the distance between the springs may be adjusted

for optimum load distribution and wearer comfort. The headpads are mounted

on adjustable stainless-steel sliders. The headpad cushions are soft polyester-

urethane foam, and are adhesive-backed for easy field replacement.

General Description

The Telex Model 5x5 Pro III is a lightweight, single-sided,

aviation headset. It features an eartip-style receiver, which

provides better speech intelligibility than an earmuff-style

headset in quiet to moderately noisy environments. It also

features a detachable headband for optional wearing

configurations using eyeglasses or a custom earmold. The

headset is approved for aviation use under FAA (Federal

Aviation Agency) TSO C57 and C58a.

Design Features

Receiver and Eartip

A magnetic receiver element is used. Sound is conducted from

the receiver to the ear via a flexible vinyl tube terminated with a

removable soft plastic eartip. The eartip fits in the ear canal of

the wearer. Three eartip sizes are included with the headset to

accommodate various ear canal sizes

Mounting Configurations

EYEGLASS TEMPLE

(INSIDE VIEW) HEADSET

(INSIDE VIEW)

PIVOT

ARM

HEADBAND

360˚

180˚

HEADPAD

CUSHION

SPRING CLIP

PIVOT ARM

MIC-RCVR

AMPL ASSY

BOOM

MICROPHONE

EAR TIP

RECEIVER PLUG

MICROPHONE PLUG

CLOTHING CLIP

GAIN

ADJUSTMENT

8 7

123456

RED

RECEIVER

GRN

RED

GRN AMPLIFIER

SHLD

RED

WHT

RCVR

PLUG

MIC

PLUG

MICROPHONE

GRN AMBGND RED

SIG

BIAS

25µF

25Vdc

12VDC

150

1/4 W

470

1/2 W

1/4 INCH

(6.4 MM)

HDST

AMPL

MIC

ARTF

VOICE

114 dB SPL

RE: 20 Paμ

350-3000 Hz

400Mv

Bosch Security Systems, Inc. • 12000 Portland Ave South • Burnsville, MN 55337 • U.S.A

Wiring Diagram

Test CircuitWiring Diagram

Ordering Information

Telex Model 5x5 Pro III Headset*.................................................................... ................................. ...................................... ............ .... Catalog No. 64000-100

(With Eyeglass Adapter Kit, Clothing Clip, Ear Tips and Carrying Pouch)

Replacement Eartip Kit (includes vinyl tubing and three sizes of eartips)..............................................................................................Catalog No. 800456013

Replacement Headpad Cushion (2 required per headset) ..........................................................................................................................Catalog No. 63575000

Replacement Clothing Clip......................................................................................................................................................................Catalog No. 590637000

Replacement Carry Pouch .........................................................................................................................................................................Catalog No. 57893000

Replacement Eyeglass Adapter Kit .......................................................................................................... ............................................. ....Catalog No. 64068000

Optional PT-300 Portable Push-To-Talk Switch** ........................................................................ ............................... .............................Catalog No. 63966000

*Other versions available upon request.

**For aircraft without a fixed push-to-talk switch, a portable push-to-talk switch must be used.

Specifications

Receiver

Type: Magnetic

Frequency Response: 100-3000Hz

Sensitivity: 119dB SPL nominal (1mW at 1kHz input)

Matching Impedance; 150–600 Ohms

Microphone and Amplifier (Provides carbon equivalent output)

Element Type: Noise-cancelling electret

Frequency Response: 300–5000Hz