SHURE 598T
Owner's Manual

Model 598T User Guide
GENERAL DESCRIPTION
The 598T is a handheld, amplified, noise-canceling communications microphone that is FAA Certified for aircraft application (TSOC58a). 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 cable can be instantly changed or replaced without soldering. A miniature 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.

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 visit 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 surfaces are available as an accessory (Shure RK6MB).

Cable
To attach the cable to the 598T, insert the modular telephonetype 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).
Table 1-1. Microphone Connector Wiring

FEATURES � FAA CERTIFIED FOR AIRCRAFT USE � USES DETACHABLE MODULINK® MODULAR-PLUG
COIL CORD (AVAILABLE WITH PJ-068,ALM-88, ALM89 AIRCRAFT-RADIO PLUG, A4M CONNECTOR)

� �

NOISE-CANCELING WITH FREQUENCY RESPONSE TAILORED FOR OPTIMUM INTELLIGIBILITY BUILT-IN TRANSISTOR AMPLIFIER POWERED BY CARBONMICROPHONE-TYPE CIRCUIT

Pin Color 1

Function N.C.

Pin 5

Color Function Black PTT Switch Ground Audio Out (AC coupled) Ground N.C.

� LOW SENSITIVITY TO HUM AND RF INTERFERENCE � RUGGED MILLION-CYCLE PLUS� LEAF-TYPE
SWITCH

2

White

Dc Bias (+), Audio Out

6

Red

3 4

Yellow PTT Switch Blue NC

7 8

Drain

�

� � �

STANDS UP UNDER SEVERE ENVIRONMENTS AND CONSTANT USE. NICKEL-SILVER BLADES WITH PALLADIUMALLOY CONTACTS FOR RELIABLE OXIDATION-FREE OPERATION IMMUNE TO OIL, GREASE, MOST FUMES AND SOLVENTS, SALT SPRAY, SUN, RUST AND CORROSION OUTSTANDING IN ITS ABILITY TO WITHSTAND MECHANICAL SHOCKS AND VIBRATION. RUGGED AND DEPENDABLE UNDER ALL OPERATING CONDITIONS

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.

©2004, Shure Incorporated 27A6004B (Rev. 2)

®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.

Printed in U.S.A.