FX 146
•
144
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