n
List of Illustrations Model 4 12A
n
LIST ? OF ILLUSTRATIONS
Number Page Number Page
1-1. Model 412A DC Vacuum Tube 5-1O.Simplified Schematic, Ohmmeter
Voltmeter . . . . . . . . . . . . . . . . . ........... , . , 1-1 Switching . . . . . . . . . . . . . . . . . . . .......... . .5-I 2
4-1. Block Diagram . . . . . . . . . . . . . . ........... , . , 4-1 6-1. Location of Mechanical Parts,
5-1. Input Resistance Check . . . . . . . . ........... . . . 5-2 Cabinet Model . . . . . . . . . . . . . . . . .......... . . 6-5
.1 5-2. AC Rejection Check . . . . . . . . . . ........... .. . 53 6-2. Location of Mechanical Parts,
53. Location of Adjustments . . . . . . ........... ... 54 Rack Model . . . . . . . . . . . . . . . . . . .......... . . 6.6
54. Input Circuit Board . . . . . . . . . . . ........... ... 56 6-3. Voltage Probe Assembly . . . . . . . . . .......... . . 6-7
t,p? 5-5. Modulator Waveform . . . . . . . . . ........... . .. 5-7 7-1. Location of Chassis Mounted.Parts,
54. Demodulator Assembly . . . . . . . . ........... ... s-8 Cabinet Model . . . . . . . . . . . . . . . . .......... . . 7-2
5-7. input Cable Connections. . . . . . . ........... ... 59 7-2. Location of Chassis Mounted Parts,
5-8. Simplified Schematic, Voltmeter Rack Model . . . . . . . . . . . . . . . . . . e......... . . 7-3
Switching . . . . . . . . . . . . . . . . . ........... . .5-10 7-3. Location of Switch Components . . . .......... .. 74
5-9. Simplified Schematic, Ammeter 74. Schematic Diagram . . . . . . . . . . . . . .......... . . 7-5
Switching . . * . . . . . . . . . , . . . . .....e..... . . .5-11 7-5 Power Supply Backdating . . . . . . . . .......... . . 7-7
8 |