Shure 777, 777A, 777S, 777SA User Guide

222

HARTREY AVE . EVANSTON,

ILL.

(60204) U.S.A

MICROPHONES

AREA CODE 312/328-9000 CABLE SHUREMICRO

AND

ELECTRONIC COMPONENTS

MODELS 777, 777A, 777s AND 777SA "SLIM-X"

OMNIDIRECTIONAL CRYSTAL MICROPHONES

With Molded Stand Adapter With A25B Swivel Adapter As a

General: Model crystal microphones. The crystal used is a Bimorph, Rochelle Salt unit. The crystal has been specially moisture-proofed to provide protection against damage due to prolonged exposure at high humidity.

Applications: Model reproduction and are ideal for recording on tape, wire or disc; fixed or mobile public address systems; call systems; amateur communications; and similar uses. These microphones are especially suitable for those applications involving partial or complete concealment. When used vertically (microphone pointing straight up), the performers

may be placed all around the microphone without frequency discrimination. The

"777"

good quality is required at low cost. lecturers

freedom of both hands is necessary. The cord clips easily to the microphone, can be easily fastened around the wearer's neck, and readily removed.

Operation: No polarizing voltage is required for crystal microphones.

speaker or power supply outlets carrying high voltage. Check your connections carefully.

exceeds weather for any considerable length of in the sun during hot weather, as the temperature inside the automobile may easily build up to over

MODEL 777 MODEL 777 MODEL 7775

S38B Desk Stand on 5388 Desk Stand Hand Held Unit

"777"

series microphones are pressure-operated, diaphragm type

"777"

series microphones are designed for voice and music

series microphones are rugged units and are recommended for use where

When used with a

;

teachers and instructors ; demonstrators; and all similar applications where

lavalier cord the

"777"

series is ideal for public speakers and

Crystal microphones may be seriously damaged if accidentally connected to loud

Crystal microphones should not be used or kept in places where the temperature

125F0.

They should not be exposed to the rays of the sun in very hot

timeor left in closed automobiles parked

125'F.

and permanently damage the crystal.

(Over)

When used near a radio transmitter, use the minimum length of cable consistent

with placement requirements. Careful grounding of the cable shield is advisable.

Connections:

grid of the first tube in the amplifier across a load resistance of 5 megohms. Input resistance as low as recommended because of better low-frequency response obtained. The shield should be connected to the amplifier chassis or ground. The shield, chassis or amplifier ground should be securely grounded to a water pipe or similar ground to prevent shock hazard during operation of the amplifying system. The cable may be lengthened if desired; low capacity shielded microphone cable should be used for this purpose.

Important:

superior performance in microphones because of low capacities, superior shielding properties and unusually long life under severe use.

Cables with plastic insulation should not be subjected to excessive soldering-iron hkat. Carefully clean and tin the conductors and the connections to which the conductors are to be soldered. The soldering operation can then be done with a minimum of heat, thereby avoiding any possibility of damage to the cable.

Guarantee:

defects for a period of one year from date of shipment from the factory, provided all instructions are complied with fully. In case of damage, return the microphone to the factory for repairs. Our guarantee is voided if the microphone case is opened.

License Notice:

The Inner or "hot" conductor of the cable should be connected to the

1 megohm may be used, if necessary, but higher values are

Shure Microphone Cables are selected after exhaustive tests to insure

Each microphone is guaranteed to be free from electrical and mechanical

Shure patents issued or pending.

FURNISHED ACCESSORIES

MODELS

Stand Adapter

Lavalier Assembly MODELS 777A and 777SA

Swivel Adapter Desk Stand Lavalier Assembly

777

and 7779

..................................................................................................

......................................................................................................

............................................................................................................

..................................................................................................

65A102

A22L

A25B

S38B

A22L

OPTIONAL ACCESSORIES

"Quick" Disconnect Isolation Adapter

......................................................................

A45

REPLACEMENT COMPONENTS

Cable and Plug Assembly Crystal Cartridge

............................................................................................

................................................................................................

C58

186A

SPECIFICATIONS

Frequency Response: Polar Pattern : Omnidirectional.

Impedance:

Voltage Sensitivity:

cable across 1 to volt per microbar). E.I.A. Microphone Rating Gm (Sensitivity) -162.0 db.

Cable:

with

Amphenol MClF plug for attaching cable to microphone.

Stand Adapter Thread: Dimensions:

(microphone only)

Finish:

Switch:

phone circuit. Press-to-talk locking or non-locking action.

Weight:

27A72 ( 10-67)

High (Recommended load impedance 1 to 5 megohms)

Detachable 7 foot (2.1 m) rubber-covered, single-conductor, shielded cable

Length, overall (with adapter) 7 inches (177.8 mm). Length, overall

Satin Chrome.

Models 7773 and 777SA only. Built-in "ON-OFF" switch to control micro-

Net 6 ounces (1 70.1 g), Packaged 1 lb. (453.6 g).

60 to 10,000 Hertz.

1.05 millivolt r.m.s. per microbar at end of 7 foot (2.1 m)

megohms at 1,000 Hertz (this is equivalent to 59.5 db below one

%"-27

4943 inches ( 11 1.1 mm) . Body Diameter 1 inch (25.4 mm)

Printed in U.S.A.