Air 3100 - Audio Equipment DYNACORD - Free user manual and instructions

Product Type	Noise-Reduction Headset with Amplified Microphone (Air3100) or Headphone only (Air3100L)
Brand	Dynacord (Telex)
Model	Air 3100 / Air 3100L
Noise Reduction Rating (NRR)	21 dB (per ANSI S3.19-1974)
Weight (Gross)	Approximately 16 oz (454 g)
Effective Head Weight	Approximately 14.2 oz (403 g)
Receiver Type	Dynamic
Receiver Frequency Response	350 Hz - 6 kHz
Receiver Sensitivity	100 ±5 dB SPL (at 1 kHz, 1 mW input)
Receiver Impedance (at 1 kHz)	150 ohms (wired in parallel)
Microphone Element	Noise-canceling electret (Air3100 only)
Microphone Frequency Response	100 Hz - 3.5 kHz
Microphone Sensitivity	-53 +2/-1 dB (ref: 1 V/μbar at 1 kHz with 12 Vdc, 100 ohm load)
Microphone Matching Impedance	50-600 ohms
Operating Voltage	8-16 VDC (supplied by aircraft radio)
Microphone Gain Adjustment Range	±5 dB (clockwise increase)
Cordage Type	Straight Y-cord (Air3100: 5 ft / 1.5 m; Air3100L: straight 5 ft)
Connectors	Air3100: PJ-068 (mic) and PJ-055 (phone); Air3100L: PJ-055
Headband Pressure Settings	3 adjustable settings
Ear Cushions	Foam-filled (gel-filled optional, field-replaceable)
Boom Microphone	Flexible, rotatable overhead (left or right side), with noise-canceling electret cartridge (snap-on/off)
Folding	Foldable into compact shape for storage
Certifications	FAA TSO C57a and C58a (Air3100); TSO C57a (Air3100L)
Color	Gray

Frequently Asked Questions - Air 3100 DYNACORD

How do I adjust the headband pressure on my Air3100 headset?

The headband has three pressure settings. To adjust, fold an earcup inward and rotate the adjustment knob to the desired setting. Repeat for both earcups, and ensure both sides are set to the same pressure to keep the headband centered.

Can I wear the microphone on the right or left side?

Yes, the boom microphone can be rotated overhead to wear on either side. The ball-and-socket joint allows precise placement.

What is the difference between the Air3100 and Air3100L models?

The Air3100 is a full headset with a noise-canceling microphone, while the Air3100L is a headphone only (listen-only) without a microphone. Both have the same noise reduction rating of 21 dB.

How do I replace the microphone cartridge?

Press the release catch on the microphone assembly and carefully pull out the assembly. Avoid pulling the wires. Unplug the connector and snap on a new cartridge (part no. 800136-000).

What is the noise reduction rating (NRR) of the Air3100?

The NRR is 21 dB, measured according to ANSI S3.19-1974. Actual protection may vary depending on fit and usage.

How do I clean the ear cushions?

The ear cushions are foam-filled with a urethane layer. Wipe them with a mild soap and water solution. Do not use solvents. They are field-replaceable.

What type of connectors does the Air3100 use?

The Air3100 uses a PJ-068 equivalent plug for the microphone jack and a PJ-055 equivalent plug for the phone jack. The Air3100L uses a PJ-055 plug.

Can I use the Air3100 with portable radios?

It is designed for aircraft radios providing 8-16 VDC. For aircraft without a push-to-talk switch, use the optional PT-300 portable PTT switch.

How do I adjust the microphone gain?

Insert a small flat-blade screwdriver into the access hole on the microphone assembly. Rotate clockwise to increase gain, counterclockwise to decrease. Factory-set for FAA certification; readjustment only by qualified avionics technician recommended.

Where can I find replacement parts for my Air3100?

Replacement parts such as ear cushions, headpad, microphone cartridge, and windscreen are available. Refer to the exploded view parts list in the manual or contact Telex/Dynacord for ordering information.

USER MANUAL Air 3100 DYNACORD

Air3100 Headset Air3100L Headphone

TELEX®

Figure 1 Air3100 Reference View

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)	125	250	500	1000	2000	3150	4000	6300	8000
Mean Attenuation (dB)	15.7	17.9	23.7	26.9	28.1	34.1	38.8	37.3	38.0
Standard Deviation (dB)	2.4	1.8	2.4	2.2	2.1	3.1	2.5	3.0	2.2
Headband Force = 2.5 PoundsNoise Reduction Rating (NRR) = 21 dB

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.

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

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 GAIN ADJUSTMENT ACCESS

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

Item No.	Part No.	Description	3100	3100L
1	800037-000	Earcup Assembly, Boom Left	1	-
	800037-002	Earcup Assembly, No Boom Left	-	1
2	800037-001	Earcup Assembly, Right	1	1
3	700085-000	Cover, Left	1	1
4	700085-001	Cover, Right	1	1
9	800103-000	Receiver Assembly w/Foam Donut	2	2
10	800136-000	Microphone Assembly	1	-
11	700486-002	Boom Assembly	1	-
19	70381-000	Boom Stop	1	-
20	700007-000	Ball Half	2	-
21	700094-001	Ball Spring	1	-
22	60074-130	Y-Cord Assembly	1	-
	60051-190	Cord Assembly	-	1
25	51856-004	Screw, Plastite, #4-20 x 1/4" Long	1	-
26	51856-030	Screw, Plastite, #4-20 x 5/8" Long	4	4
27	700140-002	Cup Liner	2	2
28	700141-000	Receiver Cover	2	2
29	59145-002	Foam Donut	2	2
33	800154-005	Headband Assembly	1	-
	800154-006	Headband Assembly	-	1
34	700134-001	Extrusion, Cord Clip	2	2
35	700453-001	Clamp Knob	2	-
	700453-000	Clamp Knob	-	2
36	800198-001	Headpad	1	1
37	63456-007	Bend Relief	1	-
	63456-003	Bend Relief	-	1
38	800024-001	Cushion, Foam	2	2
39	58364-000	Overhead Cord, 28" Long	AR	AR
41	590637-000	Clothing Clip	1	1

300048 Rev BN
300448 Rev G

Page 7
1 NOTE: Slip outside ball (20) around boom (11). Place boom stop (19) into slot on boom (11). Push inside ball half (20) to hold boom stop (19) into place. Orient ball half (20) with cup assembly so that boom will swing over but not under the earcup assembly (1).

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.

TELEX®