Sigtronics ST-8 Series User manual

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…when it counts!
Model ST-8
Headset Instructions
The ST-8 series headset is adjusted at the factory for immediate use with all
Sigtronics emergency apparatus intercoms and radio adapters in emergency
vehicles. The headset is equipped with a single plug and a coiled cord.
The head strap is adjustable so you may custom t the headset. Place the headset
over your head and adjust the strap until minimum pressure is felt on the top of
your head. For maximum noise attenuation, the clamping pressure of the head-
band has been set at the factory. Releasing the clamping pressure by bending the
headband is not advised, because loss of attenuation will result.
The microphone boom is fully adjustable and will rotate 180 degrees for use on
the left or right side of the head.
Make sure you are speaking into the side of the mic labeled “Talk” or substantial
loss of gain will occur. Microphone placement should be at the corner of the
mouth, approximately ¼” from the lips.
When you rst connect the headset, turn the volume control on the headset up
to the full clockwise position, then adjust the listening volume with the audio
control of either your radio or intercom as appropriate. If applicable, crew mem-
bers should also turn their individual headset 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 headset volume down, if necessary.
continued on back…
The headset parts may be cleaned with mild soap and water using a soft cloth.
Then dry immediately. Caution: Do Not immerse any part of the headset in water
or any other liquid. Be especially careful not to allow the microphone to become
wet! Exposure to moisture may cause internal corrosion and failure and will void
your manufacturers warranty.
Cleaning will help the headset maintain its “like new” condition for many years.
WINDSCREEN
The microphone windscreen will reduce annoying wind noise and breath pops
picked up by headset microphones. It also protects the microphone element
from dirt and moisture. The windscreen should be washed regularly to maintain
hygiene and avoid clogging. Wash in warm water and mild soap. Rinse thoroughly
and make sure it is completely dry before putting it back on.
To remove the windscreen, carefully grasp the windscreen lightly along its entire
length and remove from the microphone element being careful not to twist the
element itself.
Put the windscreen on the microphone by gently pulling from the open end. Do
not pull it so tightly that it stretches against the end of the microphone.
WARRANTY
Your headset is covered by a limited two-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 headset 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: [phone]
E-mail: [e-mail]
Web Site: www.sigtronics.com

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SIGTRONICS ST-8 HEADSET PARTS IDENTIFICATION BREAKDOWN
ITEM P/N DESCRIPTION ITEM P/N DESCRIPTION ITEM P/N DESCRIPTION
1100049 GROMMET, 5/16 INCH, RUBBER 11 100369 EAR SEAL, FOAM FILLED 21 800220 HEADBAND, METAL, BLACK, WITH GROMMETS, ST-8
2100769 KNOB, 1/2 INCH, BLACK, VOLUME, TACTICAL 12 100742 NUT, HEX, 8-32, LOCKING, BLACK 22 100772 HEADBAND EXTRUSION, 4 IN., ST-8
3100077 POTENTIOMETER 13 100374 FOAM, SOUND ATTENUATING. NOTCHED, 1/2 INCH 23 100567 GROMMET, ST-8 STUD
4100858 RECEIVER AND MOUNT, 300 OHM, MONO 14 100376 FOAM, SOUND ATTENUATING. RECEIVER HOLE, 1/2 INCH 24 100451 STUD, ST-8, EAR CUP TO BAND MOUNT
5100108 SCREW, 4 X 1/4, THREAD FORMING 15 100568 STRAIN RELIEF, CABLE 25 800035 CABLE, HEADSET, STEREO, COILED
6100221 WIRE, #22, 19 STRAND, 4 INCH 16 100379 FOAM, SOUND ATTENUATING, RECEIVER COVER, 1/4 INCH 26 90 0111 WINDSCREEN, MICROPHONE, FOAM, PACKAGED
7800193 MICROPHONE & FLEX BOOM ASSEMBLY 17 800192 PREAMP 27 10 0611 WINDSCREEN, MICROPHONE, FOAM, BULK
8100252 NUT, HEX, 8-32, LOCKING 18 100612 O-RING, WINDSCREEN RETAINER, ST-8 28 100675 OPTIONAL – HEADBAND, METAL, BLACK, LARGE
9100366 WIRE, 2 CONDUCTOR, #24, BLACK, 22 INCHES 19 100773 EAR CUP, PRINTED AND DRILLED, MIC & NON MIC SIDE 29 100402 OPTIONAL – EAR SEAL, GEL FILLED
10 100597 NUT, HEX, 3/8-24, FLEX BOOM ADAPTER 20 10 0 411 STRAP, HEADSET, ST-8, BLACK
8-18-2015
st-8.pdf