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Ramsey Electronics manual FT146 FM RECEIVER KIT, Table Of Contents, Kit Assembly

Models: FT146

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KIT ASSEMBLY

Ramsey Publication No. MFT146

Price $5.00

KIT ASSEMBLY

AND INSTRUCTION MANUAL FOR

FT146 FM RECEIVER

KIT

TABLE OF CONTENTS
Introduction to the FT146	4
Circuit Description	5
Parts List	6
FT146 Assembly Instructions	8
Testing and Alignment	19
Power Supply Considerations	21
Verifying RF Power Output	21
Troubleshooting Guide	23
Enclosure Ideas	24
Microphone Considerations	24
Crystal Requirements	25
Parts Layout Diagram	26
Ramsey Kit Warranty	27

RAMSEY ELECTRONICS, INC. 590 Fishers Station Drive Victor, New York 14564 Phone (585) 924-4560 Fax (585) 924-4555 www.ramseykits.com

FT146 • 3

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Ramsey Electronics manual FT146 FM RECEIVER KIT, Table Of Contents, Kit Assembly

Contents

2 METER FM 5 WATT TRANSMITTER KIT Ramsey Electronics Model NoFT146 RAMSEY TRANSMITTER KITS TABLE OF CONTENTS FT146 FM RECEIVER KITKIT ASSEMBLY INTRODUCTION FT146 CIRCUIT DESCRIPTION FT146 2 METER FM TRANSMITTER KIT PARTS LIST CapacitorsResistors and potentiometers Required, not supplied Inductors and ferrite coresSemiconductor devices Special componentsRAMSEY Learn-As-You-BuildKIT ASSEMBLY 9. Install R14, 100K ohm brown-black-yellow 21. Install R15, 10K ohm brown-black-orange 41. Install R7, 470 ohm yellow-violet-brown Test point loop Markings on thisside This lead towards L5viewed from the top 79. Winding L3 and L4 Use the same wire andenameled wire is 2 1/2 turns and will appear to be 3 turns ifFT146 FT146 against board wire jumperWire sits flat Resistor99. Install R22, 1K ohm brown-black-red TESTING, ALIGNMENT AND ADJUSTMENT Leave leads long R13Short lead here 4. A suitable 50 ohm dummy load VERIFYING TRANSMITTER RF OUTPUT YOUR POWER SUPPLY AND RF OUTPUT POWERtransmitter keying in a receiver is of some help, but even the simplest crystal oscillator can send a fine signal into your neighbors receiver TROUBLESHOOTING HINTS MAXIMIZING RF POWER OUTPUTMICROPHONE CONSIDERATIONS CRYSTAL REQUIREMENTS OTHER ENCLOSURE RECOMMENDATIONSNOTE ON REPLACEMENT PARTS FT146 FT146 PARTS LAYOUT DIAGRAMThe Ramsey Kit Warranty FT1463.FACTORY REPAIR OF ASSEMBLED KITS TOTAL SOLDER POINTS ESTIMATED ASSEMBLYRAMSEY MODEL NO. FT146 2 METER FM TRANSMITTER KIT REQUIRED TOOLS