Shure HTS5000 Specifications
Contents
1. automatic transmissions opti mum location is to left and slightly above brake pedal 2 Drill two holes 29 0 136 in spaced 76 2 mm 3 in apart and attach footswitch to floorboard using two pan head screws supplied 3 Run footswitch cable to area of transmitter audio input Secure footswitch cable with cable clamps and screws 32 0 116 in drill or cable clips Transmitter Connections Obtain an input connector for the transmitter to be used and wire the amplifier output leads to the transmitter audio input shield to ground Wire the footswitch normally open leads across the transmitter keying circuit Note that the footswitch is not directly connected to the amplifier Adjustments Remove the hole plug covering the amplifier gain control see Figure 7 With a small screwdriver turn the amplifier gain control fully counterclockwise Start the engine and key the transmitter while sitting in the driving position and talking at a normal level Advance the amplifier gain control until proper transmitter modulation is obtained To avoid excessive noise pick up do not set the gain control higher than necessary for full voice modulation Replace the hole plug Low and High Frequency Rolloff The normal frequency response of the HF52A Am plifier is shown in curves 4 5 of Figure 6 The low fre quency rolloff characteristic shown provides optimum intelligibility under conditions of high background noise When background noi2. 222 HARTREY AVE EVANSTON IL 60204 U S A e MICROPHONES AND ELECTRONIC COMPONENTS MODEL HF52 AREA CODE 312 866 2200 CABLE SHUREMICRO TWX 910 231 0048 TELEX 72 4381 MOBILE VOICE PICKUP SYSTEM GENERAL The Shure Model HF52 Mobile Voice Pickup System is a dynamic unit designed specifically for hands free operation in a variety of mobile applications including police taxicab and other radio dispatched vehicles When properly installed the HF52 will pro vide high quality communications without the need for holding the microphone or hand keying the transmitter The HF52 is designed for use only on vehicles with 12 volt negative ground electrical systems The HF52 consists of three assemblies Model HF52M Microphone Model HF52A Amplifier and Model HF52S Footswitch The microphone is supplied with a mounting clip and a mounting bracket both for use in attaching the microphone to the vehicle sun visor and a cable for connecting to the amplifier The amplifier which has an adjustable gain control for use with a variety of mobile transmitters is supplied with two screws for attachment to the vehicle and cables for connection to the transmitter audio input and the ve hicle 12 Vdc power The weatherproofed normally open single pole footswitch is supplied with a perma nently mounted cable for connection to the transmitter and two screws for mounting to the vehicle floor A kit of cable clamps clips and ties
3. 4 7mm ve 184 INDIA 78 mm 2 7 8 N 6 4mm 15 60 NJ 174 INJDIA FOOTSWITCH DIMENSIONS FIGURE 9 MICROPHONE CARTRIDGE AND CABLE REPLACEMENT To remove and replace the HF52M Microphone car tridge or cable and plug assembly proceed as follows 1 Using pliers or wrench remove bushing at rear of microphone 2 Without allowing cable to turn unscrew end cap of microphone exposing cable cartridge connections 3 Using spanner wrench or similar tool unscrew brass retainer bushing from inside case 4 Carefully slide cartridge and attached cable out of case 5 Unsolder cartridge from cable 6 Replace cartridge by soldering cable to new cartridge see Figure 4 7 Replace cable by slipping bushing end cap and retainer bushing over new cable and soldering new cable to cartridge see Figure 4 8 Reassemble microphone by performing steps 1 through 4 in reverse REPLACEMENT PARTS The following replacement parts may be ordered from your dealer or from Shure Brothers Inc DESCRIPTION PART NO Microphone 97A297 HF52M Microphone Cartridge 99A367 Microphone Cable amp Connector 90A2573 Amplifier 1o Ret 90A2707 HF52A Gain Control Hole Plug 80A289A Amplifier Cover 95A833 Amplifier Output Cable 95C453 Footswitch 90A2240 HF52S A Parts List for the HF52A Amplifier is given
4. NG SYMBOLS DENOTE F77 CHASSIS lt CIRCUIT BOARD GROUND GROUND Caer MODEL HF52A AMPLIFIER AND FOOTSWITCH CIRCUIT DIAGRAMS FIGURE 10
5. Note that either mounting device should be positioned at top of visor and away from driver when visor is in up position Printed in U S A 2 Snap microphone into mounting clip or bracket Microphone should face roof of vehicle with visor in up position When visor is moved down microphone on visor faces downward MICROPHONE IN MOUNTING BRACKET FIGURE 1 MICROPHONE IN MOUNTING CLIP FIGURE 2 3 Secure microphone cable at visor hinge using cable tie 4 Route cable down between driver s door and windshield to amplifier NOTE Variations in vehicle design make it necessary for the installer to decide the best method of routing the cable Cable clamps and screws 32 0 116 in drill are provided to secure cable 5 Connect microphone to amplifier On some vehicles it may be desirable to mount the microphone on the steering column When this mount ing method is appropriate secure the mounting bracket with a strong rubber band passed around the steering column and hooked to both sides of the mi crophone clasp on the mounting bracket The clasp should be rotated on the bracket so that the micro phone faces the vehicle operator Route and secure the cable conveniently as described in step 4 above Connect the microphone to the amplifier Footswitch Install the HF52S Footswitch as follows 1 Locate footswitch on floorboard in an area that will permit easy access when operated by driver s left foot For vehicles with
6. dance 190 ohms at 1 kHz Output Level at 1 000 Hz Open circuit voltage without amplifier 79 0 dB 0 dB 1 volt per microbar Power Level 58 0 dB 0 dB 1 milliwatt per 10 microbars Phasing Positive pressure on diaphragm produces positive voltage on pin 2 of connector see Figure 4 CODED TERMINAL HELD MICROPHONE WIRING DIAGRAM FIGURE 4 Operating Conditions Temperature 40 to 74 C 40 to 165 F Relative Humidity 5 to 9596 Cable Non detachable 1 8m 70 in two conductor shielded plastic jacketed cable Connector Two pin male miniature audio Finish Dark gray Designed to mate with Switchcraft Slim Line II or equiv alent connector Dimensions See Figure 5 49 2mm 1 15 16 IN 20 8mm 13 16 IN DIA 1 8 M 72 IN MICROPHONE OVERALL DIMENSIONS FIGURE 5 Net Weight 98 grams 3 oz AMPLIFIER Voltage Gain at 1 000 Hz Adjustable 38 to 59 dB Frequency Response 200 to 10 000 Hz as shown in curve 4 5 of Figure 6 N TEXT NOR GHANGES IN RELATIVE RESPONSE IN 48 FREQUENCY 6 7 8 WOLLOEE 1000 10 000 20000 FREQUENCY IN MERTZ AMPLIFIER FREQUENCY RESPONSE FIGURE 6 Output Clipping Level 1V min 100 ohm output ter mination Recommended Load Impedance 100 ohms min superimposed dc voltag
7. e up to 16V will not affect operation Output Impedance Less than 10 ohms Phasing Output is out of phase with input Noise 300 Hz 20 kHz 118 dBV equivalent input noise at full gain Total Harmonic Distortion at 1 000 Hz 396 max at 500 mV output Current Drain 15 mA max no signal 25 mA max 100 ohm load 750 mV output Operating Voltage 10 0 to 15 9 Vdc negative ground Fuse 5A 32V 3AG Operating Temperature Range 29 to 74 C 20 to 165 F Dimensions See Figure 7 127 mm 7 5 1 108 4 144 IN ramm n IN em ic 4 4mm ES 777 175 INIA 5mm AIT IN DIA MOLE PLUG 92 9 mm 1 6M 3 21 32 IN 54 IN i 18 mm a ED 116 IN T AMPLIFIER OVERALL DIMENSIONS FIGURE 7 460 mm 1157 16 IN E Net Weight 323 grams 11 oz Finish Dark gray SYSTEM Frequency Response 200 to 5 000 Hz see Figure 8 4 I 4 RELATIVE RESPONSE IN dB jon ola 1000 10 000 20 000 FREQUENCY IN HERTZ SYSTEM FREQUENCY RESPONSE FIGURE 8 Output Level at 1 000 Hz Open Circuit Voltage Variable 43 to 21 dB 0 dB 1 volt per microbar Combined Net Weight 835 grams 1 Ib 13 oz Packaged Weight 1 13 kg 2 Ib 7 oz ga 9mm 3 2 1 4
8. imize perform ance in the frequency range of 200 to 5 000 Hz This results in the substantial reduction of sounds outside the desired range Because the microphone is located at a distance from the operator its output is relatively low and re quires amplification The required gain is supplied by the HF52A Amplifier Therefore a sounds of suffi ciently high level and within the microphone frequency range will be transmitted This means that the operator should be as close as possible to the microphone for maximum voice pickup and minimum noise pickup However it is not necessary for the microphone to be pointed at the operator any microphone orientation is satisfactory as long as the microphone is as close as possible to the operator The operator can help provide good communications by remembering these factors 1 Keep vehicle windows closed to minimize out side noise while transmitting 2 Bear in mind that passenger conversation or other in vehicle noise radio air conditioner etc will be transmitted 3 Remember that higher vehicle speeds mean higher background vehicle noise 4 As with any communications system care in speaking clearly will promote intelligible communica tion SPECIFICATIONS MICROPHONE Type Dynamic Frequency Response 200 to 5 000 Hz see Figure 3 RELATIVE RESPONSE IN dB 1000 FREQUENCY IN HERTZ TYPICAL FREQUENCY RESPONSE FIGURE 3 Microphone Impe
9. interfere with any vehicle control functions or service access 3 Drill two holes 29 0 136 in spaced 108 mm 4 in apart and mount amplifier using two pan head screws supplied NOTE Make sure screws attach to metal surface to provide chassis ground contact Be certain that access to gain control in amplifier covered by hole plug see Figure 7 is maintained Also make certain that there is sufficient clearance to allow insertion and removal of microphone and output cable connectors 4 Connect red power cable with in line fuse to suitable 12 volt positive power source Source must be controlled by ignition or transmitter power switch as HF52 does not contain its own power switch Secure power cable with cable clamps and screws 32 0 116 in drill or cable clips 5 Connect amplifier output cable and route to area of transmitter audio input Secure amplifier output cable with cable clamps and screws or cable clips Microphone The HF52M is an omnidirectional unit receiving sound equally from all directions As such it may be mounted almost anywhere in the vehicle However for maximum sound pressure and minimum outside noise pickup it should be located as close to the operator s mouth as possible A recommended method of in stalling the HF52M is as follows 1 Select mounting clip or mounting bracket and attach it to vehicle sun visor Figure 1 shows mounting bracket attachment and Figure 2 shows mounting clip attachment
10. is provided to secure the cables Features Convenient hands free operation under all con ditions Omnidirectional pickup pattern for uniform sound output over wide range of microphone locations Communications type frequency response for maximum intelligibility Amplifier suitable for use with most mobile trans mitter inputs designed for ceramic high imped ance dynamic or CONTROLLED MAGNETIC carbon or transistorized microphones Amplifier gain is adjustable for microphone dis tance and transmitter sensitivity Virtually unaffected by RF fields and power supply fluctuations and noise m Operable over wide temperature and humidity range Rugged construction withstands shock and vibra tion INSTALLATION Before installing the HF52 place the amplifier and footswitch in their approximate desired positions Determine whether connecting cables are of proper length and cut or splice them as required 1 feasible connect the amplifier output cable and footswitch cable to the transmitter input connector before install ing the amplifier and footswitch Copyright 1981 Shure Brothers Inc 27A1659 UC Amplifier Install the HF52A Amplifier as follows 1 Verify that vehicle battery is 12 volt negative ground i e negative battery cable is connected to vehicle frame 2 Select mounting location for amplifier under dashboard or on firewall preferably left of steering column Make certain location does not
11. on a following page The commercial alternates shown in the list are not necessarily equivalent parts but are electrically and mechanically similar and may be used if direct factory replacements are not immediately available To maintain highest possible performance and reliability Shure Factory Replacement Parts should be used 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 MODEL HF52A AMPLIFIER PRINTED CIRCUIT BOARD ASSEMBLY eit i ed lel NS MODEL HF52A AMPLIFIER PARTS LIST 90A8048 Printed Circuit Board Assembly Diode Silicon Computer 75V Silicon Rectifier 100V 1 2A Zener Diode Silicon 8 7V 3596 1 2W Zener Diode Silicon 22V 5 1W Fuse 3AG 5A 32V Commercial Alterna
12. se is not a problem the amount of low frequency rolloff can be reduced as shown in curves 1 3 The low and high frequency roll off characteristics of the Amplifier may be changed as shown in curves 1 3 and 6 8 of the figure by a simple capacitor substitution as follows Remove the Amplifier cover by removing the four screws securing it to the box To change the low frequency rolloff place a 25 Vdc minimum capacitor across terminals A and J of the printed circuit board Curve 1 068 F Curve 2 027 uF Curve 3 01 F Curve 4 as supplied Restricting the high frequency response may also under some conditions reduce the effect of back ground noise To change the high frequency rolloff solder a capacitor 25 Vdc minimum of the following value across printed circuit board terminals G and H placing this value in parallel with capacitor C3 Curve 5 as supplied Curve 6 0015 F Curve 7 0047 F Curve 8 01 Replace and secure the Amplifier cover NOTE The resultant system response microphone and amplifier is shown in Figure 8 OPERATION The HF52M Microphone is an omnidirectional unit designed for minimum wind and vibration pickup When properly installed and adjusted the HF52 system microphone and amplifier will provide approximately the same output level at approximately 46 cm 18 in as a close talked communications microphone The acoustical elements are designed to opt
13. te None 86A415 TI or GE 1N4148 86A404 Motorola 1N4002 86A421 Motorola 1N5238B 86A408 Motorola 1N4748A Littelfuse 311005 90AZ2600 Connector Two Socket Switchcraft SL 17 2F 90AR2600 Connector Phono Pin Jack Switchcraft 3501FP 80A250 Ferrite Bead Ring Stackpole 57 0181 86C349 Transistor Silicon NPN Motorola 2N5210 86A349 Transistor Silicon NPN Motorola 2N5088 86A348 Transistor Silicon NPN Motorola 2N5087 86A335 Transistor Silicon PNP TI TIS93 86A334 Transistor Silicon NPN TI TIS92 86A8303 Transistor Silicon NPN Motorola 2N6121 46D033 Potentiometer 100k CTS X201R104B Parts listed as RKC Kits should be ordered by that kit number Any orders received for piece parts where RKC Kit number is shown will be shipped in RKC quantities 5 FOOTSWITCH TO TRANSMITTER KEYING CIRCUIT INPUT amp J2 axie veL vo ce AUDIO Te a 7 QU cae co L509 Ol i ui 1 Nores ALL CAPACITORS IN MFD AND 5O VOLTS OR MORE UNLESS OTHERWISE SPECIFIED ELECTROLYTIC CAPACITORS SHOWN IN MFD X VOLTS 2 ALL RESISTORS 5 l 4w UNLESS OTHERWISE SPECIFIED ALL VOLTAGES MEASURED WITH 2 0V SUPPLY VOLTAGE A C VOLTAGES MEASURED WITH IO MEGOHMS AC VTVM w INPUT FED THRU 150 OHMS AND OUTPUT TERMINATED IN 47K OHMS VALUES ARE TYPICAL AND MAY VARY 15 4 THE FOLLOWI
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