MODEL 147
ILLUSTNATIONS
ILLUSTMTIONS
igure
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FrontPanel.. ............................. 1
Front Panel with Cable ......................... 3
Front Panel Controls .......................... 4
Model 147 Rear Pmel Controls & Connections. .............. 6
Model 1481 Low-Thermal Input Cable ................... 10
Model 1483 Low-Thermal Connection Kit. ................. 10
Bus System for Model 147 ........................ 12
Thermal Sink Construction. ....................... 15
Normal Wave Form at Demodulator with Input Shorted ........... 17
Wave Form at Demodulator Shown with Some Pickup. ............ 17
Wave Form at Demodulator when Amplifier is Saturated .......... 17
8-cps Filter Circuit for Recorder Output ................ 18
Using Model 147 with 4-Terminal Connections. .............. 18
Exploded View for Rack Mounting .................... 19
Circuit UsingGuildline9144 with Model 147 Null Detector ........ 21
Circuit Using Guildline 4363DL with Model 147 Null Detector. ...... 22
Circuit Using Guildline 9120 with Model 147 Null Detector. ....... 22
Circuit Using Biddle 605001 with Model 147 Null Detector ........ 23
Circuit Using Leeds & Northrup 7556. .................. 23
Circuit Using Model 147 Null Detector with ES1 240, 8OOR and KS 925. .. 24
Block Diagram of Model 147 Amplifier Circuits. ............. 25
Model 1.47 Tnput Circuit. ........................ 26
Diagranl of Power Supplies & Battery Charging Circuit .......... 29
Model 147 Input Compartment. ...................... 32
Correct Wave Form in dc-to-dc Inverter ................. 36
Correct Wave Form in Oscillator Circuit. ................ 38
Improper Wave Forms in Oscillator Circuit. ............... 38
Correct Wave Form at Demodulator Test Jack ............... 41
Out-of-Phase Wave Form at Demodulator Test Jack. ............ 41
Top View of Model 147 Chassis ..................... 44
Bottom View of Model 1~47Chassis .................... 45
Transistor Locations on Printed Circuit 76 ............... 46
Capacitor & Diode Locations on Printed Circuit 76. ........... 46
Resistor Locations on Printed Circuit 76 , ............... 47
Resistor 6 Test Point
Locations
on Printed Circuit 76. ......... 47
Resistor b Test Point Locations on Printed Circuit 74, Bottom Face ... 48
Component Locations on Printed Circuit 74, Top Face. .......... 48
Resistor & Test Point Location on Printed Circuit 75 .......... 49
Capacitor & 'Transistor Locations on Printed Circuit 75 ......... 49
Resistor Locations on RANGE Switch (5102). ............... 50
Resistor Locations on RANGE Switch (S102). ............... 50
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