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Ramsey Electronics manual FR146 BLOCK DIAGRAM, U1 SA602 MIXER

Models: FR146

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FR146 BLOCK DIAGRAM

FR146 BLOCK DIAGRAM

U1

SA602

MIXER

U2, 3359

FR146 • 8

Image 8

Ramsey Electronics manual FR146 BLOCK DIAGRAM, U1 SA602 MIXER

Contents

FR146 2 METER FM RECEIVER KITRamsey Electronics Model No PARTIAL LIST OF AVAILABLE KITS KIT ASSEMBLY TABLE OF CONTENTSFR146 2 METER FM RECEIVER KIT INTRODUCTION TO THE FR146 FM RECEIVER BUILDING YOUR FR146 KITFR146 CIRCUIT DESCRIPTION PARTS LIST Inductors Semiconductors and ICsSpecial Components Fixed ResistorsSEMICONDUCTOR REPLACEMENT DATA Controls and HardwareREQUIRED, NOT SUPPLIED NOTE CONCERNING THE AUDIO OUTPUT JACKFR146 FR146 BLOCK DIAGRAMU1 SA602 MIXER FR146 PARTS LAYOUT DIAGRAM FR146RAMSEY “Learn-As-You-Build”KIT ASSEMBLY Now, lets start building1. ANTENNA INPUT AND TUNED RF PREAMPLIFIER FURTHER COMPONENT INSTALLATION2. SA602 OSCILLATOR-MIXERand VARACTOR TUNING FR146 FR146 21. Install C8, .001 uF marked .001, 102, or 1 nF PROGRESS SUMMARY 4. MC3359 FM IC and ASSOCIATED COMPONENTS 5. FINAL CONNECTIONS THE LM386 AUDIO IC STAGE TESTING, ALIGNMENT AND ADJUSTMENT ALIGNMENT PROCEDUREADDING AN LED POWER ON INDICATOR RECEIVER SENSITIVITYOTHER ENCLOSURE RECOMMENDATIONS FR146 TROUBLESHOOTING HINTS SOME NOTES FOR ADVANCED USERShearing about significant performance improvements, we do not recommend casual modification attempts 3.FACTORY REPAIR OF ASSEMBLED KITS The Ramsey Kit WarrantyFR146 ESTIMATED ASSEMBLY RAMSEY MODEL NO. FR146 2 METER FM RECEIVER KITREQUIRED TOOLS TOTAL SOLDER POINTS