Specifications

FX-146 • 3
TABLE OF CONTENTS:
The Ramsey FX-146 Tranceiver Manual is organized into three sections:
General Reference Information, Kit Assembly Phase 1, and Kit Assembly
Phase 2.
FX-146 GENERAL REFERENCE INFORMATION
Notice Regarding FX-146 Frequency Coverage ................................4
FX-146 Technical Specifications ........................................................5
Introduction to Transceiver Kit Assembly ...........................................6
A Message to Ham Radio Beginners .................................................8
DC Power Supply Considerations ......................................................9
Enclosure and Hardware Considerations.........................................10
Ramsey CFX Transceiver Enclosure Kit ..........................................12
Guide to PC-board I/O Connections.................................................14
Microphone & Speaker Information ..................................................16
A Few Antenna Considerations ........................................................16
VHF Packet Data Operation .............................................................17
FX-series Transceiver Block Diagram ..............................................18
FX-146 Circuit Overview...................................................................19
Quick-Reference Programming Guide .............................................28
FX-146 Programming Worksheet.....................................................30
Using Computer BASIC as a Programming Aid ...............................32
How to Activate an Auxiliary (non-Standard) Offset .........................35
Programming "Minus" Offsets...........................................................36
FX-146 Programming Summary.......................................................38
Basics of Externally-Controlled Frequency Switching ......................38
FX-series GLOSSARY of Terms ......................................................40
Troubleshooting Guide .....................................................................46
Note on Replacement Parts..............................................................48
FX-146 Master Component Index ....................................................49
RAMSEY ELECTRONICS FX Kit Warranty Terms ..........................62
KIT ASSEMBLY: PHASE 1
Assembly and Explanation of Circuit Stages A through F
(including Kit Parts List, kit-building tips and preliminary receiver & VCO
test)............................................................................................63 - 98
KIT ASSEMBLY: PHASE 2
Assembly and Explanation of Circuit Stages G through TX (includes all
Frequency Programming directions plus alignment and transmitter tuneup.)
................................................................................................ 99 - 137
Optional Helical Filter Installation ...................................................138
Technicians Notes ..........................................................................139