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FT146 manual
Models:
FT146
1
14
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Troubleshooting
FT146 PARTS LAYOUT DIAGRAM
Note On Replacement Parts
Warranty
enameled wire
Estimated Assembly
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FT146 • 14
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Contents
FT146
2 METER FM 5 WATT TRANSMITTER KIT
Ramsey Electronics Model No
RAMSEY TRANSMITTER KITS
KIT ASSEMBLY
TABLE OF CONTENTS
FT146 FM RECEIVER KIT
INTRODUCTION
FT146 CIRCUIT DESCRIPTION
Resistors and potentiometers
FT146 2 METER FM TRANSMITTER KIT PARTS LIST
Capacitors
Special components
Inductors and ferrite cores
Semiconductor devices
Required, not supplied
RAMSEY 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
This lead towards L5
Markings on this
side
Test point loop
is 2 1/2 turns and will appear to be 3 turns if
79. Winding L3 and L4 Use the same wire and
enameled wire
viewed from the top
FT146
FT146
Resistor
wire jumper
Wire sits flat
against board
99. Install R22, 1K ohm brown-black-red
Short lead here
TESTING, ALIGNMENT AND ADJUSTMENT
Leave leads long R13
4. A suitable 50 ohm dummy load
YOUR POWER SUPPLY AND RF OUTPUT POWER
VERIFYING TRANSMITTER RF OUTPUT
transmitter keying in a receiver is of some help, but even the simplest crystal oscillator can send a fine signal into your neighbors receiver
MAXIMIZING RF POWER OUTPUT
TROUBLESHOOTING HINTS
MICROPHONE CONSIDERATIONS
OTHER ENCLOSURE RECOMMENDATIONS
CRYSTAL REQUIREMENTS
NOTE ON REPLACEMENT PARTS
FT146 PARTS LAYOUT DIAGRAM
FT146
3.FACTORY REPAIR OF ASSEMBLED KITS
The Ramsey Kit Warranty
FT146
REQUIRED TOOLS
ESTIMATED ASSEMBLY
RAMSEY MODEL NO. FT146 2 METER FM TRANSMITTER KIT
TOTAL SOLDER POINTS