Model 598T User Guide
©
2004, Shure Incorporated
27A6004B (Rev. 2)
Printed in U.S.A.
GENERAL DESCRIPTION
The 598T is a handheld, amplified, noise-canceling communica-
tions microphone that is FAA Certified for aircraft application (TSO-
C58a). In addition to its extremely clear transmission, even in noisy
environments, the 598T has very low sensitivity to hum pickup and
low susceptibility to radio frequency interference.
The 598T is ergonomically designed and fits naturally in the
hand. Its high-impact ARMO-DUR
®
case is strong, lightweight, and
comfortable to the touch in hot or cold environments.
A five-conductor MODULINK
®
cable (sold separately) connects
the microphone to the PJ-068 plug on most aircraft radios. This ca-
ble can be instantly changed or replaced without soldering. A min-
iature screwdriver is supplied for unlocking and removing the
cable.
The microphone is powered directly from the microphone input
of the transmitter, allowing the 598T to be installed and operated
with most modern aircraft radios without equipment modification.
Output levels are factory preset to meet TSO-C58a requirements.
Only an FAA Approved Service Facility or Shure Incorporated
should make adjustments.
FEATURES
•
FAA CERTIFIED FOR AIRCRAFT USE
•
USES DETACHABLE MODULINK
®
MODULAR-PLUG
COIL CORD (AVAILABLE WITH PJ-068,ALM-88, ALM-
89 AIRCRAFT-RADIO PLUG, A4M CONNECTOR)
•
NOISE-CANCELING WITH FREQUENCY RESPONSE TAI-
LORED FOR OPTIMUM INTELLIGIBILITY
•
BUILT-IN TRANSISTOR AMPLIFIER POWERED BY CAR-
BONMICROPHONE-TYPE CIRCUIT
•
LOW SENSITIVITY TO HUM AND RF INTERFERENCE
•
RUGGED MILLION-CYCLE PLUS
™
LEAF-TYPE
SWITCH
•
STANDS UP UNDER SEVERE ENVIRONMENTS AND CON-
STANT USE. NICKEL-SILVER BLADES WITH PALLADIUM-
ALLOY CONTACTS FOR RELIABLE OXIDATION-FREE OP-
ERATION
•
IMMUNE TO OIL, GREASE, MOST FUMES AND SOLVENTS,
SALT SPRAY, SUN, RUST AND CORROSION
•
OUTSTANDING IN ITS ABILITY TO WITHSTAND MECHANI-
CAL SHOCKS AND VIBRATION.
•
RUGGED AND DEPENDABLE UNDER ALL OPERATING
CONDITIONS
APPLICATIONS
Voice communication, including aerospace.
PART OF A COMPLETE LINE
The 598T is part of a full line of mobile microphones, circuitry
products and related accessories.
For a complete listing, contact your Shure Representative or vis-
it www.shure.com.
SET-UP
Mounting
A hang-up loop comes affixed to the microphone. Heavy-duty
mounting brackets for attachment to radio equipment or other sur-
faces are available as an accessory (Shure RK6MB).
Cable
To attach the cable to the 598T, insert the modular telephone-
type plug in the microphone jack until it locks. To remove the cable,
insert the supplied miniature screwdriver in case hole just above
the cable jack (see Figure 1) to unlock the plug and withdraw the
plug from the jack.
The MODULINK
®
cables are wired at the microphone connector
as shown in Figure 4. See the microphone connector wiring table
(Table 1).
OPERATION
1. Hold the microphone comfortably in the hand with the front of
the microphone facing the mouth.The clearest sound is often
obtained with the microphone at the corner of the mouth, with
the cable away from the face.
2. Depress the push-to-talk button to activate the microphone.
Make sure the equipment is in transmit mode when speaking.
Table 1-1. Microphone Connector Wiring
Pin Color
Function
Pin
Color Function
1
N.C.
5
Black
PTT
Switch
Ground
2
White
Dc Bias (+),
Audio Out
6
Red
Audio Out
(AC
coupled)
3
Yellow PTT Switch
7
Drain
Ground
4
Blue
NC
8
N.C.
®Shure, MODULINK®, and ARMO-DUR are registered trademarks of Shure, Incorporated.™
Million-Cycle Plus and Top-talk Sound Channel are trademarks of Shure Incorporated.
All other trademarks are the property of their respective owners.
