Shure 1968 catalogue communications microphones

Page 1

SHUFRE

MURUPHUNES

COMMUNICATIONS: MOBILE; BASE STATION
DISPATCHING
PAGING
AMATEUR & CB

Page 2

PROFESSIONAL MOBILE

CONTROLLED MAGNETIC 404" SERIES
. . . THE STANDARD OF THE INDUSTRY

Without a doubt, the strongest and most practical close-talking micro-
phone for ANY mobile application. It is the most widely used mobile
microphone among police, taxicab and fleet truck operators. Exclu-
sive ARMO-DURTM case is comfortable to hold in hot or cold weather

. is immune to oil, grease, fumes, sun, salt, spray, rust and corrosion

. outstanding in its ability to withstand mechanical shocks and
vibration. The rugged war-time proved, Shure-patented Controlled
lVIagnetic cartridge has specially tailored response for high speech
intelligibility. Lightweight . . . easy to use . . . fits snugly in the palm
of the hand. Million-cycle leaf-type switch controls the microphone
circuit and an external relay or switching circuit. Fully shielded against

/ II

electric. and magnetic fields. Only 311/16 high, 2%" wide. 11%6 deep.
Includes built-in lifetime hang-up button and mounting bracket.

Semi-directional.

Model 405T (only) has a built-in transistorized amplifier for improve-
ment-replacement of most carbon microphones. Does not require bat-
teries or extra power supplies. Provides greater clarity, and freedom

from aging (common to carbon microphones).

SPECIFICATIONS
Frequency Switch Relay List
Model Response Output Level Impedance Cable Type Mic. Circ. Ciro. Price
-~52.0 db (0 db ~= I milli- 5% ft. coiled cord,
4048 {$043000 watt per 10 microbars) ; .121 150-250 Ohms copper. 4 conduc- Open* Open $33.00
5 millivolts/microbar tor (2 shielded)
, 54.0 db (0 db '-- 1 volt per High (Recommended .3", ft. coiled cord,
404C 490'4000 100 microbars) ; 2.0 Load, 100,000 ohms copper, 3 conduc- (.Ilosed** Open $33.00
Hz millivolts/microbar or more) tor (l shielded)
_1 db loaded with 500 r :3 ft. extended 4-
405T*** 4004000 ohms (0 db -: 1 volt per 109-300 01.1.1? . conductorstranded 7 Open $48.50
Hz (Carbon (.irtuit)

100 microbars)

-~~coiled cord

*Irovision for simpli- change to normally closed.

H Provision for simple change to normally opcn.

*"131:nsisttn'izcd for direct replacement of carbon microphones.

A DOZEN GOOD REASONS WHY THE 404 SERIES IS YOUR BEST BUY
IN MOBILE COMMUNICATIONS MICROPHONES

1. World Famous Controlled Magnetic Cartridge - Field-proved
throughout the world under extreme conditions of military and com-
mercial use.

2. Corrosion Proof Armo-Dur Housingk Immune to severe weather
conditions. Unaffected by corrosive materials normally encountered or
used: oils, grease, fumes, salt spray, etc.

3. High Impact Armo-Dur Housing-Has high elasticity limits.
Resists extreme mechanical shocks and retains original shape.

4. Constant Impact Strength-VVithstands mechanical shocks under
varying conditions of temperature - with uniform impact resistance.
(Varies only 25% in impact strength through a range running from
440° to 1650 fahrenheit as compared to a variance of 959}. for
standard die-cast housings.)

5. Eliminates Shock Hazard - Special Armo-Dur" housing is an
insulator - eliminates electrical shock hazard.

6. Reduces Operator Fatigue - Under actual operating conditions.
the complete microphone (including plug and cable) weighs only 8

02., 42.9% less than similar die-cast microphones. The net weight of
the microphone, plug, and cable is 12 02.. 33.39% less than Similar
die-cast microphones.

7. No Vibration Fatigue-Armo-Dur" eliminates shattering. break-
ing or cracking of housing often caused by continuous Vibrations.

8. Color Permanence-Color runs throughout the Armo-Dur"
housing. It is unaffected by handling. sun and corrosxve fumes or
materials which are normally encountered or used.

9. Low Thermal Conductivity-Feels normal to the hand in extreme
heat or cold.

10. Life-Time Hang-Up Button-Unique shock mounting prevents
button pull out.

11. Fully Shielded-A high permeability shield and the vacuum
metalizing on Armo-Dur" case provide effective shielding against
electro-static and magnetic fields. '

12. No Sacrifice of Quality For Price - Rigid laboratory and field
tests on every component insures long-life trouble-free service.

It is estimated that the Model 404 Microphone withstood over 35,000 separate shock-
HERE 8 PROOF OF ITS RUGGEDNESS impacts during a 3.3 mile test drive at a speed ranging from '20 to 30 miles per hour.

. . . dragged behind swiftly moving autos:

time of abnormally severe handling.

This is far greater punishment than would ever be required of a microphone in a life-

©1968 SHURE BROTHERS, INC.