RACAL RA.117 SERVICE MANUAL


9.8.1999

TECHNICAL SPECIFICATION

INTRODUCTION

INSTALLATION

OPERATION

BRIEF TECHNICAL DESCRIPTION

DETAILED CIRCUIT DESCRIPTION

MAINTENANCE

SPURIOUS RESPONSES

VALVE DATA

FAULT DIAGNOSIS

REPRESENTATIVE TEST DATA

GENERAL SERVICING AND ALIGNMENT PROCEDURES

DISMANTLING

COMPONENT LIST 1 (RESISTORS, CAPACITORS, SWITCHES, PLUGS AND SOCKETS)

COMPONENT LIST 2 (VALVES, CRYSTALS, INDUCTANCES, TRANSFORMATORS ETC.)


LIST OF ILLUSTRATIONS:

FIG.1 - REAR VIEW OF RECEIVER CHASSIS

FIG.2 - FRONT PANEL, RA.117

FIG.3 - RA.117 BLOCK DIAGRAM

FIG.4 - SIMPLIFIED BALANCING CIRCUIT

FIG.5 - NOISE LIMITER CIRCUIT

FIG.6 - TYPICAL SELECTIVITY CURVES

FIG.7 - TERMINAL TAG STRIP

FIG.8 - TOP VIEW OF RECEIVER

FIG.9 - FIRST V.F.O. - TOP VIEW

FIG.10 - FIRST V.F.O. - UNDERSIDE

FIG.11 - SECOND V.F.O.

FIG.12 - 1.7Mc/s OSCILLATOR / AMPLIFIER AND MIXER UNIT

FIG.13 - B.F.O. UNIT

FIG.14 - CRYSTAL CALIBRATOR UNIT

FIG.15 - KEY TO UNDER - CHASSIS LAYOUT

FIG.16 - R.F. ATTENUATOR

FIG.17 - SUPPLY FILTERS

FIG.18 - CRYSTAL OSCILLATOR / AMPLIFIER AND HARMONIC FILTER SYSTEM

FIG.19 - SECOND MIXER

FIG.20 - BAND - PASS FILTERS

FIG.21 - 100 kc/s I.F. AMPLIFIER - RIGHT SIDE

FIG.22 - 100 kc/s I.F. AMPLIFIER - LEFT SIDE

FIG.23 - AUDIO STAGES AND POWER SUPPLIES

RA.117 RECEIVER - SCHEMATIC DIAGRAM


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