Shure 507B Datasheet

D Q MICROPHONES AND ELECTRONIC COMPONENTS 1 DATA SHEET MODEL 507B AREA CODE 3121866-2200 CABLE: SHUREMlCRO I TWX: 910-231-0048 TELEX: 72-4381 I DYNAMIC HAND-HELD PAGING MICROPHONE GENERAL The 5078 microphone is a high quality, extremely reliable dynamic hand-held microphone with an ex- tended low- and high-frequency response that partic- ularly suits it for ham use, mobile FM transmission, and top-quality paging systems. The microphone has a highly intelligible, clear, crisp, natural voice response. It features professional design, small size, light weight, and modular construction, providing extreme depend- ability and exceptional ease of field service. The modular construction of the 507B accounts for its tremendous ease of field serviceability. The car- tridge, switch, and cable are of modular design which make them replaceable in a matter of minutes if re- placement is ever necessary. The microphone wiring is channeled so that crimping or breaking of wires is no longer a concern. The unit fits naturally and comfortably in the hand and is not affected by heat or humidity. Exclusive ARMO-DUR@ case is light gray and charcoal, is im- mune to oil, grease, fumes, salt spray, sun, rust and corrosion-and is outstanding in its ability to withstand mechanical shocks and vibration. "Million-Cycle" leaf- type switch is double-pole, single-throw, designed to withstand severe operating conditions and constant usage. The TRIPLE-FLEX@ cable provides 3 to 4 times the flex life of any previously available coiled cords- another Shure first. 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 Exceptional ease of field service "Life-time" hang-up button and mounting bracket TRIPLE-FLEX@ cable provides exceptionally long life APPLICATION The Model 507B microphone is highly recommended for all types of mobile communications; for hams; industrial and commercial paging; outdoor public address systems; and all applications where a rugged hand microphone is required. The Model 507B is a low impedance microphone and is recommended where long cable lengths are required. l NSTALLATION A 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 1). CONNECTIONS The internal switch connections of Model 507B are shown in Figure 2. The 507B has a four-conductor coiled cord cable (two conductors shielded) 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 "hot" conductors for balanced-line connection to the microphone circuit; the shield is connected to the microphone circuit ground. The RED and BLACK leads control the relay or switching circuit. The microphone circuit of the switch is normally open but may be easily modified for normally shorted operation. The Model 507B is wired for balanced-line operation and is recommended for use where long cable lengths are required, or conditions where severe hum pickup may exist. The 507B microphone may be fed directly into a standard low-impedance amplifier, or a Shure A95 Series Line Matching Transformer may be used for MOUNTING HOLES, CLEARANCE FOR No. B SCREWS - MOUNTING BRACKET FIGURE 1 BUTTON MOVEMENT--r k, 1 YELLOW I INTERNAL CONNECTIONS FIGURE 2 Copyright 1981, Shure Brothers Inc. 27A1170 (UK) (OVER) Printed in U.S.A.

ance amplifier. A two-conductor shielded cable may be used for extending only the microphone circuit. If both the microphone circuit and the remote circuit are to be extended, a four-conductor cable should be used having two shielded conductors for the micro- phone circuit. The microphone circuit of the Model 507B is nor- mally open when the microphone switch button is in the normal position. The microphone switch may be rewired to have a normally shorted microphone circuit. To modify the Model 507B for a normally shorted microphone circuit, proceed as follows: 1. Remove the three No. 6 Phillips self-threading screws from the back of the microphone case. 2. Separate the case front and back, and remove the microphone switch button. 3. Unsolder or clip the WHITE cable lead from upper (from bottom of microphone) switch solder lug (see Figure 2). 4. Solder the WHITE cable lead to the lower switch solder lug (containing the YELLOW lead to the microphone cartridge). 5. Place the microphone switch button in the normal position on the case front. Place the case back on the case front and firmly press the two sec- tions together. Fasten the case back to the case front with the screws previously removed. OPERATION The Model 5078 will operate very satisfactorily under all ordinary conditions of humidity, heat, and cold. Dropping the microphone or other severe mechanical shocks should be avoided. SPECIFICATIONS TY pe Dynamic Frequency Response 100 to 5,000 Hz (see Figure 3) 6 - +I0 Z - s o C W cj -I0 W L L I I I I l I l l l l l I I l l l l l l l I J 20 50 100 lpO0 lO.000 Pop00 FREQUENCY IN HERTZ TYPICAL FREQUENCY RESPONSE FIGURE 3 Output Level (at 1,000 Hz) Open Circuit Voltage* ................. -39.0 dB (11.2 mV) Power Level** ....................... - 58.0 dB *O dB = 1 volt per 100 microbars **0 dB = 1 milliwatt per 10 microbars Impedance Microphone rating impedance is 150 ohms (200 ohms actual) for connection to microphone inputs rated at 19 to 300 ohms Switch Double-pole, single-throw, leaf-type Cable Attached, recoils to 0.3m (1 ft), extends to 1.8m (6 ft) Case Two-tone gray and charcoal ARMO-DUR@ Dimensions See Figure 4 (I-49/64 INJ -I 44.mM r OVERALL DIMENSIONS FIGURE 4 Net Weight 312 grams (11 oz) Packaged Weight 510 grams (18 oz) FURNISHED ACCESSORY Mounting Bracket ......................... RK6MB REPLACEMENT PARTS Cartridge ................................... R50 Switch .................................. 90A3507 Cable ................................... 70A4110 GUARANTEE This Shure product is guaranteed in normal use to be free from electrical and mechanical defects for a period of one year from date of purchase. Please retain proof of purchase date. This guarantee includes all parts and labor. This guarantee is in lieu of any and all other guarantees or warranties, express or implied, and there shall be no recovery for any con- sequential or incidental damages. SHIPPING INSTRUCTIONS Carefully repack the unit and return it prepaid to: Shure Brothers Incorporated Attention: Service Department 1501 West Shure Drive Arlington Heights, Illinois 60004 If outside the United States, return the unit to your dealer or Authorized Shure Service Center for repair. The unit will be returned to you prepaid.