MFJ MFJ-8100 User Manual

MFJ-8100
World Band Receiver
1
MFJ-8100 World Band Receiver
Table of Contents
For Beginners Page 2
Just a Bit of History
Page 2
Back to Today and the Future
Page 3
A Simplified Explanation of How it Works
Page 3
For Experienced Hams, Enthusiasts and Engineers
Page 4
Receiver Controls and Connections
Page 6
Understanding and Using the Regeneration Control
Page 7
Tuning SSB Voice Signals Page 8
Using and Enjoying Your Receiver
Page 9
Setting Up A Useful Shortwave Antenna
Page 9
Your Receiver Audio Circuit
Page 10
About the 5 Tuning Ranges of Your Receiver
Page 11
Shortwave Listening in General
Page 12
In Case of Difficulty
Page 12
Notes for Radio Hams & Experimenters
Page 13
Conclusion Page
14
Some Helpful Terms & Abbreviations Page
15
Sample SWL Log Page Page 17
MFJ-8100 Parts List Page
18
PC-Board View Page 19
Schematic Diagram of MFJ-8100 Receiver
Page 20

MFJ MFJ-8100 Specifications

General

Selectivity	2.4 kHz at -6 dB, 4.0 kHz at -60 dB
Power Supply	12 VDC, 500 mA
Dimensions	5.5 x 3.5 x 1.5 inches
Weight	1.5 lbs
Modes	AM, CW, SSB
Antenna Connector	SO-239
Type	Receiver
Sensitivity	0.5 µV
Power	12 VDC
Mode	AM, CW, SSB

Summary

Back to Today and the Future!

A Simplified Explanation of How It Works

Introduces the basic sections of the receiver's circuit design.

RECEIVER CONTROLS AND CONNECTIONS

REGENERATION (R1)

Explains the Regeneration control's role in receiver sensitivity and distinguishing signal types.

RF GAIN (R9)

Details the RF gain trimmer and its adjustment based on antenna type.

UNDERSTANDING & USING THE REGENERATION CONTROL

TUNING SSB (Single Sideband) VOICE SIGNALS

USING & ENJOYING YOUR RECEIVER

SETTING UP A USEFUL SHORTWAVE ANTENNA

YOUR RECEIVER'S AUDIO CIRCUIT: MANY WAYS TO LISTEN IN!

Explains the audio circuit's design for headphone use and alternative listening options.

ABOUT THE 5 TUNING RANGES OF YOUR RECEIVER

IN CASE OF DIFFICULTY

MFJ-8100 Parts List