Shure Microphone 526T User Manual

Model 526T Series II Super Punch  
Microphone User Guide  
TRANSISTORIZED BASE STATION MICROPHONE  
S Replaces either ceramic or dynamic original equip-  
ment microphones  
S Excellent response for single-sideband transmission  
S Uses readily available 9-volt battery—low current  
drain for long life  
S Low hum pickup, minimum susceptibility to RF inter-  
ference  
S Momentary or locking press-to-talk transmit/receive  
switch –”Million Cycle” leaf-type  
S Universal six-wire cable for instant microphone-trans-  
ceiver connection  
S Sturdy, high-impact ARMO-DUR case  
S Rugged and dependable under all operating  
conditions  
BATTERY INSTALLATION  
GENERAL  
The Shure Model 526T Series II SUPER PUNCH base  
station microphone is designed for clearer transmission and  
improved reliability. This transistorized microphone can be  
used to replace ceramic or dynamic, high- or low-impedance  
microphones supplied as original equipment.  
Model 526T Series II uses a 9 Vdc battery (90AJ1371).To  
install the battery, proceed as follows:  
1. Loosen two screws (located underneath base) holding  
battery retaining clip, and remove battery retaining  
clip.  
Model 526T Series II provides crisp, undistorted voice re-  
sponse with adjustable volume control for optimum intelligi-  
bility of transmission.  
2. Connect terminal strap to battery.  
3. Insert battery in VELCRO strap of battery retaining  
cllip and fasten VELCRO strap.  
The microphone is designed for maximum versatility in  
base station operation. It has a momentary or locking press-  
to-talk transmit/receive switch for greatest ease of use, and  
a modulation level volume control for highest undistorted  
output with high- or low-impedance inputs. The supplied six-  
wire cable and triple-pole double-throw switch are arranged  
for universal microphone-transceiver connection.  
4. Insert battery retaining clip in base and tighten screws  
securely.  
CONNECTIONS  
The microphone is not affected by heat or humidity, and it  
is oustanding in its ability to resist mechanical shocks and  
vibration. Its exclusive ARMO-DUR case is immune to oil,  
grease, fumes, salt spray, sun, rust, and corrosion. The “Mil-  
lion Cycle” leaf-type press-to-talk switch is designed to with-  
stand rigorous operating conditions and constant use.  
Model 527T Series II can be connected to an input (trans-  
ceiver, transmitter, or amplifier) of 500 ohms or more. For de-  
tailed instructions for connecting the 526T Series II to CB or  
ham transceivers. If your unit is not listed in the Guide, con-  
tact your dealer or Shure Incorporated for information.  
A piece of tubing is attached to the plug end of the cable  
for use as a strain relief for plugs with large cable entry holes.  
Remove the tubing when not required.  
Microphone Features:  
S Dynamic microphone with transistorized preamplifier  
S Adjustable volume control for optimum transmiter  
The internal connections of Model 526T Series II are as  
shown in Figure 1.  
modulation and maximum intelligibility  
2001, Shure Incorporated  
27B1468 (AI)  
Printed in Mexico  
 
Polar Pattern  
Omnidirectional  
a) Unsolder the WHITE leads from switch terminals 7  
and 8.  
Output Impedance  
5,000 ohms  
b) Solder the WHITE leads together, and insulate the  
connection.  
c) Unsolder the RED cable lead from terminal 3 and  
solder it to terminal 8.  
Load Impedance  
500 ohms minimum  
d) Solder a jumper lead between terminal 7 and the  
ground lug.  
Output Level (At 1,000 Hz with 100 kilohm load)  
Adjustable from 0.61 to 16 mV for 1 microbar input  
At the end of the cable, BLACK and BLUE leads are now  
the isolated receive leads; the YELLOW lead is the  
grounded receive lead; and the RED lead is the grounded  
transmit lead.  
Signal Handling Capability (With 50 kilohm load)  
111 dB SPL at 1,000 Hz produces 1.0V with volume con-  
trol at maximum  
Battery Type  
VOLUME CONTROL  
9 Vdc  
When the 526T Series II replaces a dynamic (usually low–  
impedance) microphone supplied as original equipment, the  
volume control should be set at the lower ranges to prevent  
overmodulation and unintelligible transmission. Correct  
modulation can be checked on the modulation level indicator.  
Battery Drain  
0.9 mA  
Battery Life  
300 hours minimum, replace after 1 year  
When the 526T Series II replaces a ceramic (usually high-  
impedance) microphone supplied as original equipment, the  
volume control should be set at the upper ranges for correct  
modulation as indicated on the modulation level indicator.  
Switches  
Press-to-talk: Single-bar, momentary or locking, leaf-type  
triple-pole, double-switch  
Cable  
2.1m (7 ft) five conductor, one-conductor shielded, rubber  
jacketed, attached, coiled cable  
WARNING  
Too high a volume control setting causes over-  
modulation, interference, channel splatter, and  
unintelligible voice transmission. Carefully check  
the volume control setting.  
Case  
Black, high-impact ARMO-DUR  
Dimensions  
See Figure 3  
LOCKING PRESS-TO-TALK SWITCH  
The fingertip control bar of the press-to-talk switch can be  
used in a momentary or locked-on position. For use as a mo-  
mentary switch, depress the control bar and release after  
transmission. To lock the switch in the On position, depress  
the control bar and move it forward with the fingertips. To un-  
lock the switch, move the control bar backward and remove  
pressure.  
Net Weight  
920 grams (2 lb)  
Packaged Weight  
1.2 kilograms (2 lb. 11 oz)  
3
 
Replacement Parts  
Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R96  
Grille Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 90D1844  
Battery Retaining Clip . . . . . . . . . . . . . . . . . . . . . 90A2351  
Baseplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53A1459A  
Coiled Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70A544  
Switch Blade Assembly (6-blade) . . . . . . . . . . . 90A2595  
Switch Blade Assembly (4-blade) . . . . . . . . . . . 90A3510  
Press-to-talk Control Bar . . . . . . . . . . . . . . . . . 65A1279A  
Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 46A060  
Printed Circuit Assembly . . . . . . . . . . . . . . . . . . 90A2721  
222 Hartrey Avenue, Evanston, IL 60202–3696, U.S.A.  
Phone: 847-866–2200 Fax: 847-866-2279  
In Europe, Phone: 49-7131-72140 Fax: 49-7131-721414  
In Asia, Phone: 852-2893-4290 Fax: 852-2893-4055  
Elsewhere, Phone: 847-866–2200 Fax: 847-866-2585  
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