Specifications

2
b. PRE-AMP OUT ............................................................................................14
c. COMMON ....................................................................................................15
d. REMOTE ......................................................................................................15
e. SYNC ............................................................................................................15
f. NOISE OUT..................................................................................................15
E. MAINTENANCE AND REPAIRS ......................................................................16
F. MODEL 141 MICPLEXOR..................................................................................17
1. Description ........................................................................................................17
2. Controls.............................................................................................................17
a. Microphone Inputs ........................................................................................17
b. Level Controls...............................................................................................17
c. Power.............................................................................................................17
d. Battery Check................................................................................................17
e. MULTIPLEX-SINGLE Function .................................................................18
f. MIC. SELECT Switch...................................................................................18
g. Output Connector..........................................................................................18
3. Operation...........................................................................................................18
WARRANTY................................................................................................................19
Damage in Shipment.....................................................................................................19
Return Shipment............................................................................................................19
140 Preamp and Overload Schematic ...............................................................................20
140 Filter Schematic..........................................................................................................21
140 Multiplexer Schematic ...............................................................................................22
140 Control Section Schematic.........................................................................................23
140 Light Board Schematic...............................................................................................24
140 Power Supply and Noise Source Diagrams................................................................ 25
Pin Connections for Chips - 1 of 2....................................................................................26
Pin Connections for Chips - 2 of 2....................................................................................27
140 Calibration Pot Locations...........................................................................................28