Sigtronics SH-40C Series User manual

Sigtronics Corporation
178 East Arrow Highway
San Dimas, CA 91773
Phone: [phone]
E-mail: [e-mail]
Web Site: www.sigtronics.com
igtronics
®
S
…when it counts!
igtronics
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Model SH-40C
Headphone Instructions
The SH-40C series headphones are adjusted at the factory for immedi-
ate use with all current standard radio systems in general aviation aircraft.
SH-40C headphones are equipped with one plug in the standard congura-
tion. 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 t 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 rst 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 appro-
priate. 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.
continued on back…
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 SH-40C HEADPHONE PARTS IDENTIFICATION BREAKDOWN
ITEM P/N DESCRIPTION ITEM P/N DESCRIPTION ITEM P/N DESCRIPTION
1800145 HEADBAND , WITH CUSHION, S-40 11 100108 SCREW, 4 X 1/4, THREAD FORMING 21 800034 CABLE, HEADPHONE, MONAURAL, COILED
2100383 HEADBAND, METAL, STANDARD 12 100251 E-RING, EAR CUP TO YOKE RETAINER 22 100933 WIRE, CROSSOVER, OVER THE HEAD, 28 INCH
3100367 YOKE, EAR CUP MOUNT, METAL 13 100252 NUT, HEX, 8-32, LOCKING 23 100568 STRAIN RELIEF, CABLE
4100384 BRACKET, YOKE SUPPORT WITH TANG 14 100981 EAR CUP, PRINTED AND DRILLED, CABLE SIDE 24 100360 KNOB, BLACK, VOLUME
5100373 SLIDE, YOKE BRACKET, LONG, NYLON 15 100938 EAR CUP, PRINTED AND DRILLED, VOLUME CONTROL SIDE 25 100365 POTENTIOMETER, 2K
6100258 CLIP, HEADBAND GUIDE, PLASTIC 16 100049 GROMMET, 5/16 INCH, RUBBER 26 100858 RECEIVER AND MOUNT, 300 OHM, MONO
7100393 CLIP, ANTI-ROTATION, YOKE, PLASTIC 17 900123 EAR SEAL, FOAM FILLED, SET OF TWO 27 100618 OPTIONAL – HEADBAND, METAL, YOUTH
8100362 CLIP, CROSS-OVER, WIRE, PLASTIC 18 100374 FOAM, SOUND ATTENUATING. NOTCHED, 1/2 INCH 28 100257 OPTIONAL – HEADBAND, METAL, LARGE
9100363 SCREW, 8-32 X 1/2, PHILLIPS HEAD 19 100376 FOAM, SOUND ATTENUATING. RECEIVER HOLE, 1/2 INCH 29 900124 OPTIONAL – EAR SEAL, GEL FILLED, SET OF TWO
10 100364 SCREW, 8-32 X 3/8, PHILLIPS HEAD 20 100379 FOAM, SOUND ATTENUATING, RECEIVER COVER, 1/4 INCH
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3-31-2022
sh-40c.pdf