Telex Headphones AIR3100 User Manual

Telex  
User Instructions  
Air3100 Headset  
Air3100L Headphone  
 
General Description  
The Telex Air3100 is a medium-weight noise-reduction headset with  
amplified, noise-canceling, electret microphones. The Telex Air3100L is a  
headphone only and does not have a microphone. They both have a  
noise reduction rating of 21 dB, and are suitable for use in moderately  
noisy aircraft. All models feature a unique headband design that  
distributes ear cushion pressure evenly over the entire ear with no  
pressure points, unlike conventional designs which apply more pressure  
on the bottom of the ear than on the top. An added advantage of this  
design is that the headset folds into an extremely compact shape for  
storage. The Air3100 headset is approved for aircraft use under FAA  
TSO’s C57a and C58a. The Air3100L headphone is approved for aircraft  
use under FAA TSO’s C57a.  
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 ear cushions combine comfort and light  
weight with 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 field-replaceable.  
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. The  
amplifier output level is adjustable through an opening in the microphone  
assembly.  
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.  
Sound Attenuation Data: The following measurements for the Telex  
Air3100 and AIR3100L Headsets were made according to the American  
National Standard Institute (ANSI) S3.19-1974 by Paul Michael and  
Associates. These laboratory-derived attenuation data are for comparison  
purposes only, as the amount of protection afforded in field use is often  
significantly lower depending upon how the headphones are fitted and  
worn.  
Center Frequency (dB)  
Mean Attenuation (dB)  
Standard Deviation (dB)  
125  
15.7  
2.4  
250  
17.9  
1.8  
500  
23.7  
2.4  
1000 2000 3150 4000 6300 8000  
26.9  
2.2  
28.1  
2.1  
34.1  
3.1  
38.8  
2.5  
37.3  
3.0  
38.0  
2.2  
Headband Force = 2.5 Pounds  
Noise Reduction Rating (NRR) = 21 dB  
Page 1  
 
Operation  
Headband Pressure Adjustments  
There are three pressure settings. Increasing the pressure will improve  
the seal between the earcup and the head for greater noise reduction. To  
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.  
HIGH  
MEDIUM  
LOW  
Figure 2  
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 canceling, 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.  
Figure 3  
Connections  
Page 2  
 
MIC GAIN  
ADJUSTMENT  
ACCESS  
Microphone Gain Adjustment  
The microphone gain has been factory-  
adjusted to the nominal level required for  
FAA certification, and it should normally  
not require readjustment. Readjustment  
by a qualified avionics technician is  
recommended. To access the gain trimmer, insert a  
small flat-blade screwdriver through the access hole in the  
mic assembly. Clockwise rotation of the trimmer increases  
gain.  
Mic Assembly Removal  
Press the release catch on the microphone  
assembly, and carefully pull out the  
assembly. Avoid pulling the microphone  
wires. Pull on the plastic connector  
housing to unplug the microphone  
assembly.  
Air3100 & Air 3100L Headset Wiring Diagram  
Air3100 Microphone Wiring Diagram  
Page 3  
 
Exploded View Parts List (See Figure 4)  
Item No.  
Part No.  
800037-000  
800037-002  
800037-001  
700085-000  
700085-001  
800103-000  
800136-000  
700486-002  
70381-000  
700007-000  
700094-001  
60074-130  
60051-190  
51856-004  
51856-030  
700140-002  
700141-000  
59145-002  
800154-005  
800154-006  
700134-001  
700453-001  
700453-000  
800198-001  
63456-007  
63456-003  
800024-001  
58364-000  
590637-000  
Description  
Earcup Assembly, Boom Left  
Earcup Assembly, No Boom Left  
Earcup Assembly, Right  
Cover, Left  
3100  
1
3100L  
1
1
2
1
1
3
1
1
4
Cover, Right  
1
1
9
Receiver Assembly w/Foam Donut  
Microphone Assembly  
Boom Assembly  
2
2
10  
11  
19  
20  
21  
1
1
Boom Stop  
1
Ball Half  
2
Ball Spring  
1
Y-Cord Assembly  
Cord Assembly  
1
22  
1
25  
26  
27  
28  
29  
Screw, Plastite, #4-20 x 1/4" Long  
Screw, Plastite, #4-20 x 5/8" Long  
Cup Liner  
1
4
4
2
2
Receiver Cover  
2
2
Foam Donut  
2
2
Headband Assembly  
Headband Assembly  
Extrusion, Cord Clip  
Clamp Knob  
1
33  
34  
35  
36  
37  
1
2
2
2
Clamp Knob  
2
Headpad  
1
1
Bend Relief  
1
Bend Relief  
1
38  
39  
41  
Cushion, Foam  
2
2
Overhead Cord, 28" Long  
Clothing Clip  
AR  
1
AR  
1
300048 Rev BN  
300448 Rev G  
Page 4  
 
Figure 4  
Page 5  
 
Specifications  
Receivers:  
Type: Dynamic  
Frequency Response: 350 Hz - 6 kHz  
Sensitivity: 100 5 dB SPL (1 kHz, 1 mW input)  
Impedance (at 1 kHz): 150 ohms (receivers wired in parallel)  
Microphone and Amplifier: (AIR3100 only)  
Element Type: Noise-canceling electret  
Frequency Response: 100 Hz - 3.5 kHz  
Sensitivity: -53 +2/-1 dB (ref:1 V/ µbar at 1 kHz with 12 Vdc supply  
voltage and 100 ohm load).  
Matching Impedance: 50-600 ohms  
Gain Adjustment Range: 5 dB (clockwise rotation increases gain)  
Operating Voltage (supplied by aircraft radio): 8-16 volts dc  
Cordage:  
Air3100: Straight Y-cord, 5 ft (1.5 m)  
Air3100L: Straight, 5 ft (1.5 m)  
Connectors:  
Air3100: PJ-068 equivalent plug for radio mic jack; PJ-055 equivalent  
plug for radio phone jack  
Air3100L: PJ-055 plug or equivalent  
Weight:  
Gross Weight: Approximately 16oz. (454 g)  
Effective Head Weight: Approximately 14.2 oz. (403 g)  
Color: Gray  
Ordering Information  
(See Exploded View Parts List for a complete listing of replacement parts)  
Air3100 Headset .................................................. Catalog no. 300048-200  
Air3100L Headphone (listen only) ........................ Catalog no. 300448-000  
Thin-skin foam ear cushions (set of two) ............ Catalog no. 800027-003  
Gel-filled ear cushions (set of two)....................... Catalog no. 800027-002  
Head pad ............................................................. Catalog no. 800198-001  
Microphone cartridge ........................................... Catalog no. 800136-000  
Microphone windscreen......................................... Catalog no. 57012-001  
Model PT-300 Portable Push-To-Talk Switch* ...... Catalog no. 63966-000  
* For aircraft without a push-to-talk switch, a portable push-to-talk switch  
must be used.  
Page 6  
 
LIMITED WARRANTY — VALID ONLY IN UNITED STATES AND CANADA  
TELEX Communications, Inc. (“Telex”) warrants to the user, who originally purchased the  
product delivered with this card, that the product will be free from defects in material and  
workmanship for the following periods after such date of purchase: Material 36 months,  
workmanship 36 months. Telex will, at its option, repair or replace, free of charge, such  
defective products subject to the following conditions:  
1. Delivery of the product or parts postage prepaid to the Telex dealer, authorized  
service facility or factory.  
2. Determination by Telex that a defect exists and is covered by the limited warranty.  
Defects due to alteration, repair by an unauthorized person, insertion of non-Telex  
parts, misuse, accidental damage, use of the equipment for purposes other than  
those for which it was designed, and the like, are not covered by this limited warranty  
and repairs thereof will be subject to normal service charges.  
3. Repairs and replacement parts are covered under this limited warranty only for the  
unexpired term of the original limited warranty.  
4. Products purchased from unauthorized dealers are not warranted.  
5. You must fill out and return the attached registration card within 10 days after such  
purchase or this limited warranty is void.  
THIS LIMITED WARRANTY IS EXPRESSLY IN LIEU OF ANY EXPRESS OR IMPLIED  
WARRANTY, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR  
FITNESS FOR A PARTICULAR PURPOSE WHICH EXTENDS BEYOND THE TERM  
HEREOF. THE REMEDIES PROVIDED BY THIS LIMITED WARRANTY ARE THE ONLY  
REMEDIES AVAILABLE TO ANY PERSON. NO PERSON HAS ANY AUTHORITY TO  
BIND TELEX TO ANY REPRESENTATION OR WARRANTY OTHER THAN THOSE  
PROVIDED BY THIS LIMITED WARRANTY. TELEX SHALL NOT BE LIABLE FOR ANY  
INCIDENTAL OR CONSEQUENTIAL DAMAGES CAUSED BY FAILURE OR OTHERWISE  
OF THE PRODUCT.  
Some states do not allow exclusions or limitations of incidental or consequential damages  
or limitations on how long an implied warranty lasts, so the limitations or exclusions herein  
may not apply to you. This warranty gives you specific legal rights, and you may also have  
other rights which vary from state to state.  
Page 7  
 
NOTES  
 
NOTES  
 
38110-015 Rev B  
 
6/02  

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