background image

5

RED

BLACK

D

S

G

MODEL SM98A CABLE

C1

C2

MK1

U1

RED DOT

CONDENSER

CARTRIDGE

IMPEDANCE

CONVERTER

3–PIN MINIATURE

CONNECTOR

2

2

2

2

2

4

MODEL WM98 CABLE

RED

BLACK

SHIELD

3

1

3

3

1

1

1

1

3

3

RED

BLACK

SHIELD

BLUE

98 MICROPHONE

(TB3M)

MICROPHONE WIRING DIAGRAMS

FIGURE 12

NOTES:

1

UNLESS OTHERWISE SPECIFIED, ALL RESISTORS ARE 1/8 WATT, 5%.

2

UNLESS OTHERWISE SPECIFIED, ALL CAPACITORS IN 

 

m

F, 10%, 50 V OR GREATER. ELECTROLYTIC CAPACITORS SHOWN IN 

 

m

F X VOLTS, 20%.

3

THE FOLLOWING SYMBOLS DENOTE:

PC BOARD GROUND

CHASSIS GROUND

GAIN

GRN

OR

BROW

N

OR

90B4339C–3

CIRCUIT DIAGRAM – SM98A PREAMPLIFIER

FIGURE 13

Summary of Contents for SM98A

Page 1: ... pin connectors and an acoustic foam windscreen to minimize wind noise in outdoor applications and from air moving equipment The Shure ILP 1 low distortion high clipping level phantom powered preamplifier is furnished with the SM98A microphone Additional included accessories are a windscreen for use with the microphone alone and a windscreen for use with the A98SPM a shock mount swivel adapter and...

Page 2: ...ng N A Flat Lo Cut Preamp switch Lo Cut 12 dB rolloff below 80 Hz Phasing Positive pressure on microphone diaphragm pro duces positive voltage on pins 3 and 4 with re spect to pin 1 ground Positive pressure on microphone diaphragm produces posi tive voltage on pin 2 relative to pin 3 of preamplifier output connector Recommended Operating Volt age 1 5 to 6 V pin 2 to pins 3 and 4 11 to 52 Vdc Phant...

Page 3: ...lot of the adapter and press the cable lock button while disengaging the microphone PREAMPLIFIER PERMANENT MOUNTING SM98A The supplied mounting clamps are intended to hold the pre amplifier in place in permanent installations see Figure 9 Use either one or two clamps depending on location and application MOUNTING CLAMPS SM98A PREAMPLIFIER FIGURE 9 PREAMPLIFIER SWITCHES The preamplifier case contai...

Page 4: ...rst Again take care not to pinch the wires connect ing the board to the end cap 3 Rotate the assembly inside the case until the four holes for Phil lips screws line up with the holes in the case 4 Replace the four Phillips screws 5 Resolder the three lead wires to the back of the XLR board as shown in Figure 11 RED BLUE BLACK 2 3 1 WIRING TO XLR PC BOARD TERMINALS FIGURE 11 6 Replace the XLR board...

Page 5: ... BLACK SHIELD BLUE 98 MICROPHONE TB3M MICROPHONE WIRING DIAGRAMS FIGURE 12 NOTES 1 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE 1 8 WATT 5 2 UNLESS OTHERWISE SPECIFIED ALL CAPACITORS IN mF 10 50 V OR GREATER ELECTROLYTIC CAPACITORS SHOWN IN mF X VOLTS 20 3 THE FOLLOWING SYMBOLS DENOTE PC BOARD GROUND CHASSIS GROUND GAIN GRN OR BROW N OR 90B4339C 3 CIRCUIT DIAGRAM SM98A PREAMPLIFIER FIGURE 13 ...

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