Telex Echelon 20 User manual

User Instructions
Echelon 20
Headset
Telex
®

Page1
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
Cam
tm
)
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.

Page2
GENERAL DESCRIPTION
TheTelexEchelon20 isamedium-weightnoise-reductionheadsetwithamplified,
noise-canceling,electretmicrophone.
DESIGN FEATURES
(See Figure 1)
Comfortablefoam-filledheadbandpadandearcushions. Theheadbandpadevenly
distributes the headset weight with no pressure points, for maximum wearer
comfort.Thelightweight earcushionscombinecomfortwithanexcellentacoustic
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 armfeaturesasealedball-and-socketjoint 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
microphonecartridgefeaturesanoise-cancelingelectretelement.Thecartridge
snaps on and off for easy replacement. The microphone amplifier is in the
microphonecartridge.Itoperatesoncurrentsuppliedbytheaircraftradioviathe
microphonejack.
Cordage: Themicrophonecordage is protected inside theboom arm.Shielded
wire throughout the headset protects against RFI and EMI. Strain-reliefs on all
cordsprovidemaximum durability.

Page3
OPERATION
HeadbandPressureAdjustments
Therearethreepressuresettings for headbandcomfort.Increasingthepressure
willimprovethesealbetweentheearcupandtheheadforgreaternoisereduction.
Tochangethepressuresetting,remove the headset and foldtheearcupinward
asshown,thenrotate the adjustmentknobtothedesiredsetting. Repeat forboth
earcups.Bothsidesoftheheadbandshouldbeset to the same pressure setting
tokeeptheheadbandproperly centered on the head.
Boom Microphone Placement
1. Rotatetheentireboomoverheadto
wear the microphone on either the
right or left side of the head.
2. Forbestnoisecancelation,position
the microphone as close to the
mouth as possible and speak in a
normalvoice.(Seefigure3)
3. Whenthemicrophoneis not in use,
it may be swung slightly away from
themouth.
HIGH MEDIUM LOW
Figure 2
Figure 3

Page4
Figure 4
MIC GAIN
ADJUSTMENT
ACCESS
Microphone Gain Adjustment
Themicrophonegainhasbeenfactory-adjustedtothenominallevelrequiredforaviation
use. Itshouldnormallynotrequirereadjustment.Readjustmentbyaqualifiedavionics
technician is recommended if adjustment is needed. To access the gain trimmer,
insert a small flat-blade screwdriver through the access hole in the mic assembly.
Clockwiserotation of the trimmerincreasesgain.

Page5
SPECIFICATIONS
Receivers:
Type:Dynamic
FrequencyResponse:100 Hz - 3.5 kHz
Sensitivity: 95 dB SPL minimum (1 kHz, 1 mW input)
Impedance(at1 kHz): 150 ohms (receiverswiredinparallel)
Microphone and Amplifier:
ElementType: Noise-canceling electret
FrequencyResponse:100 Hz - 3.5 kHz
Sensitivity:-50 ±6dB(ref:1V/µbarat 1 kHz with 12Vdcsupplyvoltageand470-
ohmDC , 150ohmACload).
MatchingImpedance:50-600ohms
GainAdjustment Range: ± 5 dB (clockwise rotation increases gain)
OperatingVoltage(suppliedby aircraftradio):8-16voltsdc
Cordage:
Straight Y-cord, 5.5 ft (1.67 m)
Connectors:
PJ-068equivalentplugforradio micjack;PJ-055equivalentplugforradiophone
jack
Weight:
EffectiveHead Weight:Approximately14.2oz.(403g)
Color: Medium Gray
ORDERING INFORMATION
Headset ................................................................Catalogno.PRD000012000
Thin-skinfoamear cushions (set of two)...................... Catalogno.800456008
Gel-filledearcushions (set of two)................................Catalogno.800456009
Headpad ..................................................................... Catalogno.800456004
Microphonecartridge....................................................Catalogno.800136100
Microphonewindscreen................................................Catalogno.800456000
ModelPT-300 PortablePush-To-TalkSwitch* ................ Catalogno.63966000
ZipperPouch............................................................... Catalog no.590061003
* For aircraft without a push-to-talk switch, a portable push-to-talk switch must
beused.

Page6
TELEX COMMUNICATIONS, INC. - LIMITED WARRANTY
Uniform Limited Warranty: Telex branded products are warranted by Telex Communications, Inc.
against malfunction due to defects in materials and workmanship for a specified period, as noted in the
individual product line statements below, beginning with the date of original purchase by the end-user.
If such malfunction occurs during the specified period, the product will be repaired with new or
remanufactured equivalent parts and products or replaced (at our option) without charge. The product
will be returned to the customer postage prepaid.
Exclusions and Limitations: The limited warranty does not apply to: (a) exterior finish or appearance;
(b) certain specific items described in the individual product line statements below, (c) malfunction
resulting from use or operation of the product other than as specified in the product data sheet or
owner’s manual; (d) malfunction resulting from misuse or abuse of the product, including accidents; (e)
defects resulting from excess moisture, lightning or power surges; or (f) malfunction occurring at any
time after repairs have been made to the product by anyone other than a Telex Service Department
employee or any of its authorized service representatives. The warranty is void if the label bearing the
product serial number (if applicable) has been removed or defaced.
Other Express or ImpliedWarranties Excluded: TOTHEEXTENTPERMITTEDBYAPPLICABLELAW,
THE WARRANTIES SET FORTH HEREIN ARE IN LIEU OF, AND EXCLUSIVE OF, ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED. SPECIFICALLY EXCLUDED, WITHOUT LIMITATION, ARE
THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR USE OR FORAPARTICULAR PURPOSE,
AND WARRANTIES ARISING FROM COURSE OF DEALING OR USAGE OF TRADE OR ANY
OTHER MATTER. IF, UNDER APPLICABLE LAW, IMPLIED WARRANTIES MAY NOT BE VALIDLY
EXCLUDED, THE DURATION OF SUCH IMPLIED WARRANTIES IS LIMITED TO THE WARRANTY
PERIOD.
Limitation of Remedies;Certain Damages Excluded: REPAIR OR REPLACEMENT OF DEFECTIVE
PRODUCTSARETHESOLEANDEXCLUSIVEREMEDIES PROVIDED BY TELEX TO THE CUSTOMER
OR TO ANY OTHER PERSON AND SHALL CONSTITUTE FULL SATISFACTION OF ALL CLAIMS,
WHETHER BASED ON CONTRACT, NEGLIGENCE, STRICT LIABILITY OR OTHERWISE. TELEX’s
MAXIMUMLIABILITYSHALLNOTEXCEEDTHEACTUALPURCHASE PRICE PAID FORTHEPRODUCT
BYTHE CUSTOMER. TELEXAND ITS SUBSIDIARIES SHALL NOT BE LIABLE FORANY INDIRECT,
INCIDENTAL, PUNITIVE, SPECIAL OR CONSEQUENTIAL DAMAGES INCLUDING, WITHOUT
LIMITATION, INJURY TO PERSONS OR PROPERTY OR LOSS OF USE. SOME STATES AND
COUNTRIES DO NOTALLOW THE EXCLUSION OR LIMITATION OF CERTAIN DAMAGES, SO THE
ABOVE LIMITATION OR EXCLUSION MAY NOTAPPLYTO YOU. IN SUCH STATESAND COUNTRIES,
TELEX SHALL BE LIABLE FOR NO MORE THAN THE DIRECT DAMAGES FOR BODILY INJURY
AND/OR REAL OR PERSONAL PROPERTY ARISING FROM THE NEGLIGENCE OF TELEX.
Other Rights: This warranty gives you specific legal rights, and you may also have other rights,
depending upon where you live.
ObtainingWarranty Service: To obtain warranty service, a customer must deliver the product, prepaid,
to the appropriate Telex Service Department listed below or any of its authorized service representatives
together with proof of purchase of the product in the form of a bill of sale or invoice.
Applicable Law. The validity, performance and construction of this limited warranty shall be governed
by the laws of the State of Minnesota without reference to its choice of law principles. The Minnesota
federal courts and/or the state courts located in Hennepin County, Minnesota, shall have exclusive
personal and subject matter jurisdiction over, and the parties shall each submit to the jurisdiction of
such courts and to venue in Minnesota with respect to any dispute concerning the product or pursuant
to this limited warranty, and all objections to such jurisdiction or to such venue are hereby waived.
For additional warranty repair or service information,contact theTelex Service Department listed
below:
USA, Canada, & Latin America
1720 E 14th Street
Glencoe, MN 55336
Tel: [phone]
Fax: [phone]

CUSTOMER SERVICE
For information or technical assistance, call, write, or emailTelex at:
CustomerServiceDepartment
Telex Communications, Inc.
12000PortlandAve.So.
Burnsville,MN55337U.S.A.
[phone]
www.telex.com/aircraft
When returning equipment for repair, please enclose an explanation of the
problem.And, if the equipment is coveredunder warranty, please enclose a
copy of your proof of purchase. The equipment must be accompanied by
documentationstatingyourname,returnaddress,andtelephonenumber.
Returnequipmentforfactoryrepairto:
CustomerServiceDepartment
Telex Communications, Inc.
1720 East 14th St.
Glencoe,MN 55336 U.S.A.
[phone]
Warranty Repairs - If in warranty, no charge will be made for the repairs.
Equipment being returned for warranty repair must be sent prepaid and will
bereturnedprepaid.
Non-warranty Repairs -Equipmentthatisnotunder warranty must be sent
postage prepaid to Telex. If requested, an estimate of repair costs will be
issuedpriortoservice. Onceyouapproverepair,andrepairof equipment is
completed, the equipment will be returned on a collect on delivery basis.
Collect charges may be avoided by sending a signed check for payment in
fullalongwithyoursignedestimateapprovalform(theestimateincludesthe
shippingcharge).
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Notes

Notes

Notes

LIT000013 Rev A 04/2006