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Model 527B User Guide Dynamic Communications Microphone
Features � Extended low- and high-frequency response � Highly intelligible voice response � Unparalleled ruggedness and reliability � Moving coil (dynamic) element � ARMO-DUR case � �Million-Cycle� leaf-type switch controlling microphone and external relay or switching circuits � Modular construction for easy field service � �Lifetime� hang-up button and mounting bracket � Long-life neoprene-jacketed coil cord APPLICATIONS
GENERAL
The 527B microphone is an extremely reliable handheld dynamic microphone with an extended low- and high-frequency response particularly suited to ham radio use, mobile FM transmission, and top-quality paging systems. The microphone has a clear, crisp, and natural voice response. It features small size, light weight, and modular construction. The modular construction of the 527B permits ease of field serviceability. The design of the cartridge, switch, and cable makes them easily replaceable. The microphone is wired to prevent lead breakage or crimping. The unit fits naturally and comfortably in the hand and is not affected by heat or humidity. The exclusive ARMO-DUR® case is immune to oil, grease, fumes, salt spray, sun, rust, and corrosion and is outstanding in its ability to withstand mechanical shocks and vibrations. The �Million-Cycle� leaf-type switch is designed to withstand severe operating conditions and constant usage.
CARTRIDGE
BUTTON MOVEMENT
The 527B microphone is highly recommended for all types of mobile communications, ham radios, industrial and commercial paging systems, and outdoor public address systems. The 527B is a low-impedance microphone and is recommended where long cable lengths are required. INSTALLATION A quick release mounting bracket for permanent installation is supplied with each microphone. The bracket has mounting holes with clearance for No. 6 or No. 8 screws (see Figure 4). CONNECTIONS The internal switch connections of the 527B are shown in Figure 1. The 527B has a four-conductor, coiled cord cable and a double-pole, single-throw, leaf-type switch to control the microphone circuit and an external relay or switching circuit. The WHITE and GREEN leads are the audio conductors for balanced-line connection to the microphone circuit; the shield is connected to the microphone circuit ground (see Table 1).
WIRE COLOR INPUT TYPE WHITE AUDIO + AUDIO CHASSIS GROUND PIN 2 PIN 3 PIN 1 TIP RING SLEEVE FUNCTION XLR CONNECTOR 1/4 IN. PHONE PLUG
SWITCH
CABLE
BLACK RED BLACK + GREEN WHITE
BALANCED
GREEN SHIELD
CABLE-TO-CONNECTOR WIRING TABLE 1
INTERNAL CONNECTIONS FIGURE 1
©2005, Shure Incorporated 27C2083 (Rev. 6)
Printed in U.S.A.
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