igtronics
®
S
igtronics
®
S
…when it counts!
Model SH-40
Headphone Instructions
The SH-40 series headphones are adjusted at the factory for immediate use with
all current standard radio systems in general aviation aircraft. SH-40 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 monaural 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 (children) or large headbands are needed, they may be
ordered from Sigtronics.
When you first connect the headphone, turn the volume control on the headphone
up to the full clockwise position, 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.
Sigtronics
Corporation
178
East
Arrow
Highway
San Dimas, CA 91773
Phone: 909 305-9399
E-mail: [email protected]
Web Site: www.sigtronics.com
