Specifications

ManualsBrandsShure ManualsComputer equipmentHTS5000

222 HARTREY AVE., EVANSTON.

IL.

60204 U.S.A.

MICROPHONES AND ELECTRONIC COMPONENTS

MODEL

HF52

AREA CODE 3121866-2200 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,

Amplifier

which has an adjustable gain control for use with a

Install the

HF52A Amplifier as follows:

variety of mobile transmitters, is supplied with two

screws for attachment to the vehicle, and cables for

1. Verify that vehicle battery is 12-volt negative

connection to the transmitter audio input and the ve-

ground! i.e., negative battery cable is connected to

hicle 12 Vdc power. The weatherproofed normally

vehicle

frame.

open, single pole footswitch is supplied with a perma-

2. Select mounting location for amplifier under

nently mounted cable for connection to the transmitter,

dashboard or on firewall, preferably left of steering

and two screws for mounting to the vehicle floor. A kit

column. Make certain location does not interfere with

of cable clamps, clips and ties is provided to secure

any vehicle control functions Or service access.

the cables.

3. Drill two holes

(#29-0.136 in.) spaced 108 mm

(4Y4 in.) apart, and mount amplifier using two pan

Features:

head screws supplied.

NOTE:

Make sure screws attach

to metal surface to provide chassis ground contact.

Convenient, hands-free operation under all con-

certain

that

access

gain

control

amplifier

ditions

(covered by hole plug-see Figure

is maintained.

Omnidirectional pickup pattern for uniform sound

Also make certain that there is sufficient clearance to

output over wide range of microphone locations

allow insertion and removal of microphone and output

Communications-type frequency response for cable C~~-~nectors.

maximum intelligibility 4. Connect red power cable with in-line fuse to

Amplifier suitable for use with most mobile trans-

suitable 12-volt positive power SOUrCe. Source must

mitter

inputs designed

for

ceramic,

high-imped-

be controlled by ignition or transmitter power switch,

as HF52 does not contain its own power switch. Secure

dynamic

'ONTROLLED

power cable with cable clamps and screws (#32-0.116

carbon or transistorized microphones

in. drill) or cable clips.

Amplifier gain is adjustable for microphone dis-

5. Connect amplifier output cable and route to area

tance and transmitter sensitivity

of transmitter audio input. Secure amplifier output

Virtually unaffected by

fields and power cable with cable clamps and screws or cable clips.

supply fluctuations and noise

Microphone

Operable over wide temperature and humidity

range

The

HF52M is an omnidirectional unit, receiving

sound equally from all directions. As such, it may be

Rugged withstands shock and vibra- mounted almost anywhere in the vehicle. However, for

tion

maximum sound pressure and minimum outside noise

pickup, it should be located as close to the operator's

INSTALLATION

mouth as possible. A recommended method of in-

Before installing the HF52, place the amplifier and

stalling the HF52M is as follows:

footswitch in their approximate desired positions.

1. Select mounting clip or mounting bracket and

Determine whether connecting cables are of proper attach it to vehicle sun visor. Figure 1 shows mounting

length, and cut or splice them as required. If feasible,

bracket attachment and Figure

shows mounting clip

connect the amplifier output cable and footswitch attachment. Note that either mounting device should

cable to the transmitter input connector before install-

be positioned at top of visor and away from driver

ing the amplifier and footswitch. when visor is in "up" position.

1981,

Shure Brothers

Inc.

27A1659

(UC)

Printed

U.S.A.

Summary of content (6 pages)

PAGE 1
2 2 2 HARTREY AVE., EVANSTON. IL. 6 0 2 0 4 U.S.A. MICROPHONES AND ELECTRONIC COMPONENTS AREA CODE 3121866-2200 TWX: 9 1 0 - 2 3 1 - 0 0 4 8 MODEL HF52 CABLE: SHUREMICRO TELEX: 72.4381 MOBILE VOICE PICKUP SYSTEM GENERAL The Shure Model HF52 Mobile Voice Pickup System is a dynamic unit designed specifically for "handsfree" operation in a variety of mobile applications, including police, taxicab, and other radio-dispatched vehicles.
PAGE 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.
PAGE 3
Dimensions: See Figure 5 The operator can help provide good commun~cations by remembering these factors: 1. Keep vehicle windows closed to minimize outside 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 communication. ( 7 2 IN.
PAGE 4
AMPLIFIER OVERALL DIMENSIONS FIGURE 7 Net Weight: Finish: 323 grams (111/2 oz) Dark gray SYSTEM Frequency Response: 200 to 5,000 Hz (see Figure 8) MICROPHONE CARTRIDGE AND CABLE REPLACEMENT To remove and replace the HF52M Microphone cartridge 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 cablelcartridge connections. 3.
PAGE 5
MODEL HF52A AMPLIFIER PRINTED CIRCUIT BOARD ASSEMBLY MODEL HF52A AMPLIFIER PARTS LIST Replacement Kit Consists Of: Reference Designation Replacement Kit No.* Qty. Part No.
PAGE 6
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