Shure Microphone 535 User's Manual
Contents
1. S AA A MICROPHONES AND ELECTRONIC COMPONENTS 222 HARTREY AVE EVANSTON ILL e CABLE SHUREMICRO EVANSTON PHONE DA 8 9000 e CHICAGO PHONE SH 3 1600 DATA SHEET MODEL 535 SLENDYNE MICROPHONE OMNI DIRECTIONAL DYNAMIC Dual Impedance General The Model 535 Microphone is a slender moving coi microphone built to provide wide range reproduction of music and voice and featuring an omni directional pickup pattern The microphone has complete versatility and reliability for outdoor and indoor use and may be used in the following manner I Mounted in swivel adapter on a conventional floor or desk stand 2 Quick disengage feature permits the microphone to be removed from the swivel adapter for use as a hand microphone during audience participation interviews etc 3 The Shure Model A28L adjustable lavalier cord is an avail able accessory It permits the microphone to be worn around the neck by lecturers announcers demonstrators and all similar applications where freedom of both hands is necessary The lavalier cord clips easily to the microphone can be readily fastened around the wearer s neck and quickly removed 4 Readily accessible impedance switch permits quick change from the high impedance setting common in P A work to the low im pedance setting for use with long lines broadcast equipment etc 5 The accessory switch adapter furnished with this unit will serve in applications where an ON OFF s2. 2 pin and the white conductor to the 3 pin The 1 pin of the microphone receptacle is connected to the microphone case Pins 2 and 3 are connected to the internal elements and the microphone may be used with a balance line In the low impedance position the Model 535 may be connected directly to a standard low or medium impedance input amplifier Fig A I For use with high impedance amplifiers connect as shown in Fig A 3 The low impedance position is recommended where long cable lengths are required or under conditions of severe hum disturbance To achieve maximum freedom from hum disturbance and internal cable noise broadcast quality two conductor shielded cable such as supplied with the microphone should be used The Shure Model A27A extension cable with plugs attached is available in 25 foot lengths In this case the shield of the cable may be connected to Pin 1 of the microphone plug The two hot conductors should be connected to pins 2 and 3 The permissible cable length is practically unlimited since neither response nor level is appreciably affected For use with high impedance amplifiers Shure Model A86A Cable Type Transformer is available for coupling the low im pedance line to the amplifier input as shown in Fig A 2 The double winding primary of the Shure Model A86A Cable Type Transformer permits coupling a 50 250 ohm line to the high imped ance input The high impedance position in the Model 535 Micropho
3. plate in place of the cover plate The key of the switch plate must be set into the slot of the impedance change switch in the microphone Replace the two 2 56 binding head machine screws AMPLIFIER WITH LOW FIG A IMPEDANCE INPUT SET SWITCH AT L POSITION TWO CONDUCTOR SHIELDED CABLE CABLE LENGTH PRACTICALLY UNLIMITED cm i es ip AMPLIFIER WITH HIGH IMPEDANCE INPUT FIG A 2 SET SWITCH AT L POSITION SINGLE CONDUCTOR SHIELDED CABLE CABLE LENGTH NOT IN EXCESS OF 7 TWO GONDUCTOR SHIELOEO CABLE CABLE LENGTH PRAC TICALLY UNLIMITED SHURE ABGA TRANSFORMER MATCHES 50 250 OHMS TO HIGH IMPEDANCE INPUT 100 000 OHMS OR MORE p FIG A 3 SET SWITCH AT H POSITION CONDUCTOR AMPLIFIER WITH HIGH IMPEDANCE INPUT TWO CONDUCTOR SHIELDED CABLE UP TO 25 FOOT TOTAL CABLE LENGTH SUGGESTED LONGER LENGTHS MAY BE USED WITH SOME LOSS OF HIGH FREQUENCY RESPONSE se f FIG C Response db 50 100 IK IOK 20K Frequency Cycles per Second Response Frequency Characteristic Model 535 Microphone FIG D 274102 11 59 The center position on the switch plate marked O is the OFF position H is the high impedance 35 000 ohms position L is the low impedance 50 250 ohms position Most appli cations require use of only one impedance In this case insert the small 2 56 fillister head screw in the threaded hole below the impedance po
4. F capable of connecting to a Two Conductor shielded cable plug See Connections The microphone swivel adapter will mount on a stand having 5 27 thread The overall dimensions shall be 723 44 in length and Ya in diameter
5. h 10 Microbars RETMA Standard SE 105 August 1949 Recommended Load Impedance Model 535 L Position 50 250 ohms Model 535 H Position 100 000 or more MODEL 535 Code Word RUDEK Nt Wt Less Cable lb Packaged Weight 2 Ibs Cable 18 Foot Two Conductor Dimensions See Fig B Finish Satin Chrome Guarantee Each microphone is guaranteed to be free from electrical and mechanical defects for a period of one year from date of shipment from factory provided all instructions are com plied with fully In case of damage return the microphone to the factory for repairs Our guarantee is voided if the microphone is subjected to accident or if the case is opened MODEL 535 Architect s Specifications The microphone shall be a moving coil type microphone with a frequency range of 60 to 13 500 c p s This unit shall have an omni directional horizontal polar characteristic The microphone shall be equipped with a two position impedance change switch for adjusting the microphone rating impedance to 150 ohms or 40 000 ohms The microphone rating GM Sensitivity at 1000 c p s shall be within 3 db of the following levels L Position of switch 154 7 db H Position of switch I57 db RETMA Standard SE 105 August 1949 The microphone shall be provided with a swivel adapter adjustable through 90 from vertical to horizontal switch adapter and a receptacle equivalent to the Amphenol 9l MC3
6. ne may be used with any high gain amplifier with an input impedance of 100 000 ohms or more See Fig A 3 To connect the amplifier plug to the two conductor shielded cable supplied with the micro phone connect the shield lead and the black lead together to a ground terminal of the amplifier plug and connect the white lead to hot terminal of the amplifier plug The maximum recommended length of cable between the micro phone and the amplifier when used in the high impedance position is 25 feet Longer cable may be used with a loss of approximately 3 db at 5 000 c p s for each additional 25 feet of cable In using longer cable the two conductor shielded cable furnished with the microphone should be replaced with a single conductor shielded cable When this is done the shield of the cable must be con nected to pins 1 and 2 of the microphone plug and the center or hot conductor must be connected to pin 3 The shield chassis or amplifier ground should be securely con nected to a water pipe or similar ground to prevent shock hazard during operation of amplifying system When used with amplifiers using the grid leak type of bias at the input tube it may be desirable to use a 01 mfd condenser between the microphone and the input grid circuit Printed in U S A Switch Adapter Installation Remove the impedance switch cover plate by removing the two 2 56 binding head machine screws at each end of the cover plate Position the switch
7. sition NOT being used This prevents the switch from accidently being turned to the wrong impedance setting during use as ON OFF switch Operation No special precaution beyond ordinary care is necessary in the operation of the Model 535 Microphone It will operate efficiently and dependably under all ordinary conditions in hot and cold climates To retain the full strength of the highly efficient permanent magnet and to maintain alignment of the structure dropping or other severe mechanical shocks should be avoided The swivel adapter fits conventional floor stands desk stands and the Shure 33 and 33B Desk Stands The microphone may be easily removed from this adapter for use as a hand microphone Additional versatility in the use of the microphone is obtained by using the lavalier cord in applications where freedom of both hands is necessary Fig C illustrates use of these accessories Specifications 1000 C P S Response Model 535 L Position Open Circuit Voltage Level 0 0 00 83 db Loaded with 150 ohms cceeeeeeeeee 90 db Power Level into 150 ohms 0 0 0 0 eee l db RETMA Microphone Rating Gm Sensitivity 154 7 db Model 535 H Position Open Circuit Voltage Level 0055 6 db Loaded with 100 000 ohms 00 e eee 63 db RETMA Microphone Rating Gm Sensitivity 157 db 0 db I volt per Microbar 0 db 1 milliwatt wit
8. tions where utmost in quality is desired Model 525 Studio Microphone is recom mended In reverberant locations where feedback might be a prob lem or for distance pickup a directional microphone such as Models 300 315 Gradient Bi directional or Models 333 330 55S Ultra Cardioid Uni directional should be employed Installation The Model 535 when used with the swivel adapter has a standard 5 27 thread and may be mounted on any conventional desk banquet or floor stand Adapter Stand Couplers are available at no charge for V2 pipe thread or 54 24 thread Write Shure Brothers Inc To avoid A C hum induction when long lines are used care should be taken that the cable does not parallel A C power lines for long distances Connections The Model 535 Microphone is a dual impedance microphone It may be connected directly to a 50 250 ohm line or high impedance input Selection of either impedance is accomplished by removing the impedance switch cover plate on the microphone and changing the position of the switch The switch positions are marked L for low impedance 50 250 ohms H for high impedance 35 000 ohms The center position of the impedance switch is the OFF position The microphone cable plug is the equivalent of the Amphenol 91 MC3M plug The cable shield is connected to the 1 pin Copyright 1954 Shure Brothers Ince Shure Patents Pending OVER the black conductor is connected to the
9. witch is necessary at the microphone See section on switch adapter The smooth frequency response and attending faithful repro duction are largely due to a newly designed diaphragm attached to a sensitive coil suspended in a magnetic structure The use of high efficiency magnetic materials and specially designed magnetic circuits has made it possible to develop this small microphone and still achieve maximum operating efficiency The microphone is ruggedly built to withstand hard_usage and is unaffected by temperature and humidity variations The 18 foot high quality shielded two conductor cable is supplied with a micro phone plug equivalent to the Amphenol 91 MC3M plug The Model 535 meets the requirements for maximum quality and minimum size A self adjusting swivel adapter is supplied with the microphone and permits the microphone to be tilted through 90 from vertical to horizontal making it simple to aim the micro phone at a source of sound Applications Model 535 is ideal for high quality public address theater stage sound systems and all recording applications where an omni directional microphone may be desired Model 535 is specially recommended for interview type use where the hand a bility of the microphone is important The microphone may be used for either a single performer a dialogue a group an orchestra practically all individual and group applications For studio recording TV use and similar applica
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