TABLE OF CONTENTS

CHAPTER PAGE CHAPTER PAGE

GENERAL DESCRIPTION . . . 1-1 h MAIN I'RAME AND PRE-

SCLJ-lC'I'OKM0DTJLE . . . . 6-1
1.1 Scope of Instruction
Manual . . . . . . . . 1-1 6.1 General . . . . . . . . (7-1
1.2 Description . . . . . . . 1-1 6.2 Frcquerlcy MHz Switches
1.3 Purpose and [Jses. . . . . 1-1 C'heck . . . . . . . . . 0-1
1.4 Technical Specifications . . 1-1 6.3 Stccring Voltngc Chccks . . 6-3
1.5 Accessories and Spares . . 1-3 6.4 Prcsclcctor and R F Gain
ControlTcst . . . . . . 6-3
INSTALLATION . . . . . . 2-1 6.5 VFO Tracking Alimrnent . 6-5
6.6 VHF F i l t ~ rA s ~ m b l y
2. I General . . . . . . . . 2-1 Alignment . . . . . . . 6-6
2.2 Unpacking and Inspec- 6.7 Circuit Diagramsand Pnrts
tion . . . . . . . . . . 2-1 Ldsts . . . . . . . . . 6-7
2.3 Site Sclcction . . . . . . 2-1
2.4 Antennas and Transmission
Lines . . . . . . . . . 2-1
2.5 Installation . . . . . . . 2-2 7.1 Gcncral . . . . . . . . 7-1
2.6 Connections . . . . . . 2-4 7.2 Detailed Theory of
Operation . . . . . . . 7-1
OPERATION . . . . . . . . 3-1 7.3 Perform;rnc~eC'hccks . . . 7-4
7.4 Fault Analysis . . . . . . 7-5
3.1 General . . . . . . . . 3-1 7.5 Alignment Procedures . . . 7-1 1
3.2 Operating Controls, Indi- 7.6 Circuit Diaprarns and Pnrts
cators, and Connectors . . 3-1 Lists . . . . . . . . . 7-1 5
3.3 Operating Instructions . . . 3-4

THEORY OF OPERATION . . 4-1

8.1 General . . . . . . . . 8-1
4.1 General . . . . . . . . 4-1 8.2 Detailed Theory of
4.2 Description . . . . . . . 4-1 Opcration . . . . . . . 8-1
4.3 KF-505A Rcceivcr Block 8.3 Perf0rm;incc Checks . . . 8-7
Diagram Theory . . . . . 4-1 8.4 Fault Analysis . . . . . . 8-8
4.4 Rcceivcr Module . . . . . 4-3 8.5 Alignment Procedures . . . 8-1 (3
4.5 Synthesizer Module . . . . 4-7 8.6 Circuit Diagrams and Parts
Lists . . . . . . . . . 8-2 1
MAINTENANCE . . . . . . 5-1
9 POWER SUPPLY MODULE . . 9-1
5.1 Gcncral . . . . . . . . 5-1
5.2 Preventative Maintenance . 5- 1 9.1 Gcnernl . . . . . . . . 9- 1
5.3 Pcrformancc Test . . . . 5-1 9.2 Theory of 0per;ltion . . . 9- 1
5.4 Fault Analysis Table . . . 5-5 9.3 Tcst and Alipnmcnt
5.5 Modules Removal . . . . 5-7 Proccdurcs . . . . . . . 9-4
5.6 Module Replacement . . . 5-7 9.4 Fault Analysis . . . . . . 9-6
5.7 Printed Circuit Assemblies . 5-8 9.5 Circuit Diagram and Parts
List . . . . . . . . . . 9-7
TABLE OF CONTENTS
LIST OF ILLUSTRATIONS

TABLE OF CONTENTS (Cont.)

CHAPTER PAGE CHAPTER PAGE

10 FREQUENCY STANDARD 10.4 Fault Analysis 10-3

MODULE . . . . . . . . . 10-1 10.5 Circuit Diagram and . . .
Parts List . . . . . . . 10-5
10.1 General . . . . . . . 10-1
10.2 Theory of Operation . . 10-1 APPENDIX . . . . . . . . . A-1
10.3 Test and Alignment . . . 10-1 ACCESSORIES . . . . . . . B-1

LIST OF ILLUSTRATIONS
FIGURE PAGE FIGURE PAGE

1.1 Top and End View of RF-5O5A 7.6 Speaker Driver and Squelch Gate
Receiver . . . . . . . . . Assembly Circuit Diagram . . . 7-25
2.1 Typical Doublet Antenna 8.1 Synthesizer Module Circuit
Installation . . . . . . . . Diagram . . . . . . . . . . 8-23
2.2 RF-505A Rack Installation . . 8.2 HF VCO Assembly Circuit
2.3 Typical Antenna and Terminal Diagram . . . . . . . . . . 8-25
Unit Connections . . . . . 8.3 HF Divider Assembly Circuit
3.1 RF-505A Front Panel . . . . Diagram . . . . . . . . . . 8-27
4.1 RF-50SA Receiver Block 8.4 VHF VCO Assembly Circuit
Diagram . . . . . . . . . Diagram . . . . . . . . . . 8-29
4.2 RF-505A Rccciver Module 8.5 VHF Divider Assembly Circuit
Block Diagram . . . . . . Diagram . . . . . . . . . . 8-31
4.3 RF-505A Synthesizer Module 8.6 Spectrum Generator Assembly
Block Diagram . . . . . . Circuit Diagram . . . . . . . 8-33
5.1 RF-505A Top View (Covcr 8.7 Second L.O. Generator Assem-
Removed) . . . . . . . . bly Circuit Diagram . . . . . . 8-35
5.2 RF-505A Shown With an As- 8.8 Translator Assembly Circuit
sembly Extended for Testing . Diagram . . . . . . . . . . 8-37
6.1 RF-505A Receiver Main Frarne 8.9 14 MHz Up-Mixcr and VFO As-
CircuitDiagram . . . . . . semblyCircuitDiagram . . . . 8-39
6.2 Preselector Module Circuit 9.1 Power Supply Block Diagram . . 9-2
Diagram . . . . . . . . . 9.2 Power Supply Waveforms . . . 9-4
6.3 IF. Gain Control Assembly 9.3 Fabricated Test Circuit . . . . 9-6
Circuit Diagram . . . . . . 9.4 Component Locations, Top
6.4 VHF Filter Assembly Circuit View . . . . . . . . . . . 9-7
Diagram . . . . . . . . . 9.5 Component Locations, Side
7.1 Front End Assembly Test View . . . . . . . . . . . 9-7
Set-up . . . . . . . . . . 9.6 Power Supply Module Circuit
7.2 Receiver Modulc Circuit Diagram . . . . . . . . . . 9-1 1
Diagram . . . . . . . . . 10.1 Frequency Standard Module
7.3 Front End Assembly Circuit 724-1600. . . . . . . . . . 10-1
Diagram . . . . . . . . . 10.2 Terminal E4 Waveform . . . . 10-3
7.4 Filter Assembly Circuit 10.3 Frequency Standard
Diagram . . . . . . . . . Module Circuit Diagram . . . . 10-7
7.5 De tector/AGC Assembly
Circuit Diagram . . . . . .
I1
 LIST OF ILLUSTRATIONS

LIST OF ILLUSTRATIONS (Cont.)

FIGURE PAGE FIGURE PAGE

APPENDIX

1 Circuit Diagrams for IC-00 10 5 Circuit Diagrams for IC-0020

and IC-001 I . . . . . . . . A-2 and IC-0023 . . . . . . . . A-4
2 Circuit Diagrams for 1C-0013 6 Circuit Diagrams for IC-0024,
and IC-00 14 . . . . . . . . A-2 1C-0025, and IC-0030 . . . . . A-5
3 Circuit Diagrams for IC-00 16 7 Circuit Diagrams for IC-0035
and IC-00 1 7 . . . . . . . . A-3 and IC-0036 . . . . . . . . A-6
4 Circuit Diagrams for IC-00 18 8 Circuit Diagrams for IC-0037
and IC-00 19 . . . . . . . . A-3 and IC-0051 . . . . . . . . A-7
9 Circuit Diagram for IC-0052 . . A-8

ACCESSORIES

1 RF-506 Noise Blanker 3 RF-520 Muting Conversion

Assembly Component Module Component
Locations and Circuit Locations and Circuit
Diagram . . . . . . . . . . B3 Diagrams . . . . . . . . . . E-3

1 RF-520 Muting Conversion 1 RF-522 Mounted on a

Module Installation . . . . . . E-1 RF-505 Receiver . . . . . . . F-2

2 Typical Keyline
Installation . . . . . . . . . E-2

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