Sigtronics Corporation
178 East Arrow Highway
San Dimas, CA 91773
Phone: 909 305-9399
E-mail: [email protected]
Web Site: www.sigtronics.com
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…when it counts!
Model SH-40S
Headphone Instructions
The SH-40S series headphones are adjusted at the factory for immediate use
with all current standard radio systems in general aviation aircraft. SH-40S
headphones are equipped with one plug in the standard configuration.
The headphone plug is a large diameter plug and should be inserted into
the headphone jack (.250” standard stereo jack).
The headband is adjustable through a full range of motion, or the locking
nuts may be tightened to allow you to custom fit the headphone. Place the
headphone over your head, adjust the slides up until minimum pressure
is felt on the top of your head. The headphone is now properly adjusted.
For maximum noise attenuation, the clamping pressure has been set at the
factory. Releasing the clamping pressure by bending the headband is not
advised, because loss of attenuation will result. Note: If especially small (chil-
dren) or large headbands are needed, they may be ordered from Sigtronics.
When you first connect the headphone, turn the volume controls on the
headphone to maximum ( full clockwise on main cable side, counterclock-
wise on pot side ), then adjust the listening volume with the audio control
of either your radio or intercom as appropriate. Passengers should also turn
their individual headphone volumes up fully. Doing this allows for a full
range of adjustment for each passenger, since those with the most acute
hearing can turn their headphone volume down, if necessary.
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The headphone parts may be cleaned with mild soap and water using a
soft cloth. Then dry immediately. Caution: Do Not immerse any part of the
headphone in water or any other liquid. Exposure to moisture may cause
internal corrosion and failure and will void your manufacturers warranty.
Cleaning will help the headphone maintain its “like new” condition for
many years.
WARRANTY
Your headphone is covered by a limited three-year parts and labor warranty.
Please see the enclosed warranty card for details.
You may refer to the parts list on the reverse side, if you choose to replace
parts yourself. The parts list describes parts for this particular headphone
only. Parts lists for other models are available on our Web Site or can be
obtained by contacting Sigtronics Corporation
