Shure Microphone W15HT 58 User Manual

MODEL W15HT/58  
HANDHELD WIRELESS  
MICROPHONE-TRANSMITTER  
The W15HT/58’s normal operating range is about 100  
meters (330 feet). Operation at greater distances-300  
meters (about 1,000 feet) or more-is often accomplish-  
ed, but the determining factors in each installation will  
be reflections, obstacles and interference.  
The microphone is supplied with a zippered carry-  
ing/storage bag, a swivel adapter for mounting the  
W15HT/58 on most desk and floor stands, a lockplate  
for locking the microphone in the “on” position, and a  
small screwdriver for adjusting the transmitter gain.  
DESCRIPTION (see Figure 1)  
ANTENNA: The W15HT/58’s antenna is not visible. It  
consists of the case and grille, and a wire coil inside the  
end cap.  
BATTERY (not supplied): Only alkaline (Duracell  
MN1604 or equivalent), lithium (Kodak U9VL or  
equivalent), or heavy duty nickel-cadmium (8.4-volt)  
transistor-radio-type batteries should be used. A fresh  
alkaline battery should provide approximately 12 hours  
of operation, a lithium battery about 35 hours, and a  
fully charged, heavy-duty nicad approximately 3 hours.  
BATTERY COMPARTMENT: A locking twist-off end  
cap exposes the battery compartment.  
The Shure Model W15HT/58 is a handheld  
microphone and radio transmitter for use with Shure  
Wireless Microphone receivers. The W15HT/58 uses the  
legendary Shure SM58 unidirectional dynamic micro-  
phone cartridge as its transducer element. Small, com-  
pact and lightweight, the W15HT/58 is human-  
engineered for reliable, unobtrusive operation. The case  
is finished in satin black enamel and ridged over its  
length for optimum gripping. The cartridge is easily  
removed and is interchangeable with other Shure  
Wireless Microphone cartridges.  
BATTERY TEST LED lndicator: Flashes briefly when  
the POWER Switch is turned on and a “good” battery is  
installed. Indicator will be on and clearly visible in room  
light when the battery voltage drops to approximately  
7.0 volts.  
END CAP: The push-twist-remove end cap functions  
as both battery cover and antenna coil holder. Note that  
the end cap is color-coded internally to reflect the  
W15HT/58’s operating frequency as follows:  
All operating controls are located in a single area on  
the microphone’s outer surface, and are recessed to  
minimize accidental movement.  
Color  
Frequency  
Color  
Frequency  
The W15HT/58 uses a standard 9-volt transistor-  
radio-type battery (alkaline, lithium or heavy-duty nickel-  
cadmium recommended). The long-life alkaline battery  
is easily obtained, and battery replacement is easily ac-  
complished through a locking end cap. An LED in-  
dicator provides information on battery condition.  
The transmitter operates at a single, crystal-  
controlled frequency in the VHF band between 150 and  
216 MHz. A total of 15 frequencies, computer-selected  
for interference-free operation, are readily available,  
and other frequencies can be specially ordered. This  
means that a number of wireless microphone systems  
can be operated in a single sound installation,  
simultaneously and without intermodulation problems.  
Green  
163-168 MHz  
168-175 MHz  
175-177 MHz  
177-180 MHz  
Brown-Red  
Brown-Blue  
Brown-Orange  
Brown-Green  
Brown-Yellow  
Gray-Red  
188-192 MHz  
191-195 MHz  
192-196 MHz  
196-201 MHz  
199-204 MHz  
204-210 MHz  
210-216 MHz  
Yellow  
White-Red  
White-Blue  
White-Orange 180-182 MHz  
White-Green  
White-Yellow  
182-185 MHz  
185-188 MHz  
Gray-Blue  
FREQUENCY NAMEPLATE: Located inside the bat-  
tery compartment, the nameplate specifies the  
W15HT/58’s operating frequency. Note that the  
operating frequency must be within the end cap fre-  
quency range (see above).  
222 HARTREY AVENUE, EVANSTON, ILLINOIS 60202-3696 U.S.A.  
l
PHONE (312) 866-2200  
l
TELEX 4330191  
l
FAX (312) 866-2279  
Copyright 1988; Shure Brothers Inc.  
27A2455 (HC)  
Printed in U.S.A.  
 
Move the W15HT/58’s MICROPHONE ON/OFF Switch  
to the ON position. The receiver audio level display  
should now respond to varying sound levels.  
Sound Pressure Levels  
Normal. The W15HT/58’s Microphone Level control  
has been factory-set to provide optimum audio modula-  
tion at the receiver under typical operating conditions,  
as indicated by LED illumination in the -10 to 0 range  
(see Figure 2). Readings in this area will yield the  
highest dynamic range without overload and resulting  
distortion.  
LOW SPL GAIN ADJUSTMENT  
FIGURE 4  
NOTE: The W25DR receiver’s OUTPUT LEVEL control  
does not function with the OUTPUT switch in the LINE  
position.  
AUDIO LEVEL DISPLAY  
OPERATION  
FIGURE 2  
1.  
2.  
3.  
Turn on the microphone and receiver POWER  
Switches.  
High. For high sound pressure level (SPL) applica-  
tions such as loud singing or musical instruments, the  
preset microphone level may be too high. To avoid an  
overload and potential distortion condition, use the sup-  
plied screwdriver to turn the Microphone Level control  
down (counterclockwise; see Figure 3). This adjustment  
should be made under the expected operating condi-  
tions, that is, with the high SPL singer or musical instru-  
ment in use at the microphone. Turn the control down  
until the optimum (-10 to 0) readings are obtained.  
Make sure the W15HT/58 Microphone On/Off  
switch is on.  
Talk into the microphone (or play a musical instru-  
ment) and observe the receiver display for proper  
audio and RF indications.  
4.  
Continue talking or playing and move around the  
performing area. In each area, observe the receiver  
display and make sure the RF signal strength is  
adequate (the audio level should not change with  
movement around the performing area, only with  
changes in source loudness).  
If the W15HT/58 is to be operated continuously, at-  
tach the plastic control lockplate to avoid acciden-  
tal movement of the controls. Remove the screw  
just above the control panel. Insert the protruding  
tip of the lockplate in the slot below the Battery  
Test LED and secure it with the screw previously  
removed. NOTE: the lockplate is clear plastic and  
permits viewing the control positions and access  
to the POWER switch.  
5.  
Normal operation is shown by steady illumination of  
the yellow RF SIGNAL LED on the Shure W20R receiver,  
or by illumination of any green LED of the RF SIGNAL  
LEVEL display on the W25DR receiver. Weak signals are  
evidenced by intermittent operation of the W20R LED  
and by illumination of the lower LEDs on the W25DR.  
In most cases, the problem of weak RF signal  
strength is also indicated by audible evidence: signal  
dropout, either continuous or intermittent, or noisy,  
distorted operation. The condition is generally caused  
by RF signal blocking or operation beyond the system  
capability. Refer to the Troubleshooting section of the  
receiver manual for remedies.  
HIGH SPL GAIN ADJUSTMENT  
FIGURE 3  
Low. Low SPL conditions such as soft-spoken in-  
dividuals or conditions where the microphone must be  
at a greater-than-normal distance from the sound  
source, may require an increase in the microphone gain  
setting. To correct for a low-level condition, turn the  
Microphone Level control up (clockwise; see Figure 4)  
until a proper (-10 to 0) LED reading is obtained.  
Feedback-the annoying howl or squeal heard in the  
sound system- is as much a problem in wireless micro-  
phones as in wired mics. Checking microphone opera-  
tion throughout the performing area will probably un-  
cover any locations that are prone to audio feedback. If  
the problem cannot be solved by a slight lowering of the  
receiver output level or the associated amplifier gain,  
relocation of the loudspeakers or possibly professional  
equalization of the sound system is recommended.  
RECEIVER GAIN  
The rear-panel receiver OUTPUT can be adjusted us-  
ing the receiver’s MICROPHONE OUTPUT LEVEL con-  
trol. In this way, the wireless system output can be  
made identical to that of a conventional wired  
microphone, avoiding extreme differences in mixer in-  
put level settings. Turning the MICROPHONE OUTPUT  
LEVEL control counterclockwise decreases the output  
level, and turning it clockwise increases the output.  
3
 
approximately 35 hours (lithium); 3  
hours typical (8.4-volt nicad; per  
charge)  
IMPORTANT  
Every wireless microphone installation is a unique  
situation, and can present a variety of problems.  
Never attempt a live performance without a  
“walkthrough” first. And if major changes (fur-  
niture, scenery, etc.) were made since the  
walkthrough, check the wireless microphone  
operation again.  
Current Drain: 24 mA typical; 28 mA maximum  
Case  
Matte black enamel high-impact thermoplastic and  
steel with matte chrome steel grille  
Dimensions  
See Figure 7  
SPECIFICATIONS  
RF Power Output  
50 mW maximum; 15 mW typical  
Modulation  
FM (54F3) ± 12 kHz deviation, 50 µsec pre-emphasis  
Modulation Limiter  
Internal compressor  
Audio Level Adjustment Range  
>40 dB  
OVERALL DIMENSIONS  
FIGURE 7  
Antenna  
Integral dipole; end-loading provided by wire coil in  
battery cap  
Net Weight  
410 grams (14.5 oz); 455 grams (16.1 oz) with battery  
Transducer Type  
Dynamic  
ANTENNA  
The W15HT/58’s antenna uses a loading coil tuned to  
the operating frequency of the transmitter (see table  
under End Cap description). End caps of different  
wireless microphone transmitters should not be inter-  
Frequency Response  
See Figure 5  
The transmit-  
mixed or improper operation may result.  
ting antenna is omnidirectional, that is, it radiates  
equally in all directions. For optimum wireless  
microphone applications, the area between the  
W15HT/58 and the receiver should be as free of RF  
obstructions as possible.  
TRANSDUCER  
The dynamic transducer has a unidirectional (car-  
dioid) pickup pattern that is uniform with frequency and  
symmetrical about the axis of the microphone. The  
unidirectional pickup pattern discriminates against  
sounds coming from the rear, permitting higher gain-  
before-feedback in sound reinforcement applications.  
With its uniform cardioid pattern and wide frequency  
response, the W15HT/58 can selectively mike a par-  
ticular voice in a vocal group or instrument in an ensem-  
ble, minimizing the occurrence of microphone “bleed”.  
TYPICAL FREQUENCY RESPONSE  
FIGURE 5  
Polar Pattern  
Unidirectional (cardioid), uniform with frequency,  
symmetrical about axis (see Figure 6)  
BATTERIES  
Careful battery selection, installation, use and care  
will help avoid problems in wireless microphone use.  
The optimum combination of reliability, long life,  
availability and low cost at this time is the manganese-  
alkaline, or alkaline, battery. A word of caution about  
alkaline batteries: they are not all the same size. Make  
certain the battery you buy will make contact inside the  
battery compartment.  
Nine-volt lithium batteries offer more than twice the  
service life and greatly increased shelf life over com-  
parable alkaline batteries.  
Nickel-cadmium (nicad) batteries offer convenience  
and long-term economy, but the tradeoff is in shorter ex-  
pected life per charge. In addition, forgetting to  
recharge can be disastrous.  
Another major consideration in nicads is that of  
operating voltage. The “heavy-duty” 8.4-volt nicads are  
satisfactory for use in this microphone, but the “9-volt-  
size” nicads commonly found in stores supply only 7.2  
volts and will not provide satisfactory wireless perfor-  
mance.  
TYPICAL POLAR PATTERNS  
FIGURE 6  
Maximum SPL (for 3% THD at 1 kHz)  
118 dB or greater, level control full clockwise; 138 dB  
or greater, level control set for 20 dB attenuation  
Noise (level control full clockwise)  
SPL equiv. max., A-weighted . . . . . . . . . . . 30 dB  
SPL equiv. max., per DIN 45 405 . . . . . . . . . . . . . 33 dB  
Power  
9-volt alkaline (NEDA 1604A) or  
lithium; 8.4-volt nicad optional  
Battery Type:  
12 to 14 hours typical (alkaline);  
Battery Life:  
 
4
FURNISHED ACCESSORIES  
Carbon-zinc batteries are the least useful for wireless  
microphone operation. Their low cost is more than off-  
set by their extremely short operating and shelf life.  
Although the “heavy-duty” (HD) carbon-zinc types offer  
better low-temperature performance and service capaci-  
ty at moderate to high current drain, they will not offer  
appreciably better transmitter performance than stan-  
dard carbon-zinc batteries.  
Although battery operation is inhibited at low  
temperatures, storing batteries at low temperatures will  
increase their shelf life. They should be sealed in bags  
and, when ready for use, allowed to warm up to room  
temperature (never heated!). Cold-stored batteries  
should be used as soon as possible after bringing up to  
room temperature.  
Lockplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65A1611  
Carrying/Storage Bag . . . . . . . . . . . . . . . . . . . 26B11  
Screwdriver . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65A1587  
Swivel Adapter . . . . . . . . . . . . . . . . . . . . . . . WA370  
Adjustment Hole Plug . . . . . . . . . . . . . . . . . . 66A233  
OPTIONAL ACCESSORY  
Windscreen . . . . . . . . . . . . . . . . . . . . . . A58WS Series  
FCC CERTIFICATION  
The Shure Model W15HT/58 microphone is Type-  
Accepted under Federal Communications Commission  
Parts 90 and 74. Licensing of Shure wireless micro-  
phone equipment is the user’s responsibility, and licen-  
sability depends on the user’s classification and  
application, and on the selected frequency. Shure  
strongly urges the user to contact the appropriate  
telecommunications authority before choosing and  
ordering frequencies other than factory-preset frequen-  
cies. This recommendation applies to both original  
equipment purchase and subsequent frequency  
modification by Shure.  
Battery life is shortened by storage in high-  
temperature locations such as on amplifiers or in  
vehicles exposed to direct sunlight.  
RECOMMENDED RANGES  
Alkaline  
Lithium  
Carbon-Zinc Nicad  
7° to 32°C  
0° to 71°C  
(32° to  
160°F)  
Temperature 0° to 38°C  
-20 to 45°C  
(45° to 90°F) (-4° to  
(32° to  
100°F)  
113°F)  
WARRANTY SERVICE  
Shelf Life  
(room  
30 months  
10 years  
6 to 12  
months  
10 to 80  
days  
If your Shure wireless microphone equipment should  
require servicing under the Shure warranty, please con-  
tact:  
temperature;  
to 80% of  
capacity  
Shure Brothers Inc.  
Attention: Service Department  
222 Hartrey Avenue  
Evanston, Illinois 60202-3696 U.S.A.  
The battery should be removed if the microphone  
malfunctions, or if it is to be stored for a long period.  
Most batteries have a protective jacket, but partly or  
completely exhausted batteries are more prone to  
leakage.  
Do not attempt to recharge replaceable (primary) bat-  
teries using “chargers”, heat or other methods. This  
may cause leakage or explosion. Do not disassemble  
batteries or dispose of them in fire.  
Telephone: (312) 866-5730  
All claims of defects or shortage should be directed  
to the above address. Please furnish model number,  
operating frequency, and date, place and proof of pur-  
chase (such as a copy of the sales receipt) to establish  
warranty. Your letter should include all pertinent details  
including applicable model or part numbers and a brief  
description of the problem. Do not return any units or  
parts to Shure unless requested to do so by Shure’s Ser-  
vice Department. Any returned items must have prior  
authorization. Unauthorized returns are delayed in  
handling; these delays can be avoided by contacting  
Shure in advance and furnishing the necessary informa-  
tion.  
Manufacturer and  
Volts  
Number  
Battery Type  
Expected Life  
Alkaline  
Bright Star 7590  
Duracell MN1604  
ESB A1604  
9.0  
12 to 14  
hours  
Eveready 522  
IEC 6LF22  
NEDA 1604A  
If you are requested to return the equipment by  
Shure’s Service Department, package the unit (with all  
information requested) as follows: Check to see that  
all parts are present and in place. If the orginal carton is  
not available, place the unit in a strong shipping carton  
at least 13 mm (6 in.) larger in all three dimensions than  
the unit. Fill the surrounding space with a resilient  
packing material such as shredded paper, excelsior,  
Styrofoam, etc. Seal and mark the carton in accordance  
with postal regulations and ship it prepaid to the Shure  
Service Department.  
It is extremely important that the packaged unit be  
well-packed and fully insured. Damage claims are sub-  
ject to settlement between the shipper and the carrier,  
and this can delay repair and return of the unit.  
Shure reserves the right to make design changes and  
product improvements without assuming any obligation  
to install these changes or improvements on any pre-  
viously manufactured products. Shure also reserves the  
right to ship new and/or improved products which are  
similar to the form, fit and function of the originally  
ordered products.  
Panasonic 6AM6  
Radio Shack 23-553  
Ray-O-Vac A1604  
U.S. Military BA3090  
Varta 4022  
Lithium  
Kodak U9VL  
9.0  
8.4  
Approximately  
35 hours  
Nickel-  
Cadmium  
2.5 to 3.5  
hours per  
charge  
SAFT PS-9  
Sears 9375  
Varta TR7/8  
Carbon-  
Zinc  
Duracell M1604  
Eveready 216  
Ray-O-Vac 1604  
Radio Shack 23-464  
9.0  
9.0  
2.5 hours  
Carbon-  
Zinc  
(Heavy-  
Duracell  
M1604HD  
Eveready 1222  
Ray-O-Vac D1604  
Radio Shack 23-583  
2.5 hours  
Duty)  
REPLACEMENT PARTS  
Microphone Cartridge . . . . . . . . . . . . . . . . . . . . . . . . R149  
Screen and Grille Assembly . . . . . . . . . . . . . . . . RK143G  
End Cap . . . . . . . . . . . . . . . . 90-4049 (specify frequency)  
5
 

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