Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for MFJ MFJ-9412
Summary of Contents for MFJ MFJ-9412
- Page 1 Model MFJ-9412 INSTRUCTION MANUAL CAUTION: Read All Instructions Before Operating Equipment MFJ ENTERPRISES, INC. 300 Industrial Park Road Starkville, MS 39759 USA Tel: 662-323-5869 Fax: 662-323-6551 COPYRIGHT 2013 MFJ ENTERPRISES, INC. VERSION 1A...
-
Page 2: General Description
Built tough for years of dependable service. At home or traveling the world, you'll enjoy superb 12-meter performance with your MFJ-9412. Best of all, it's fully backed by MFJ's exclusive NO MATTER WHAT one- year guarantee. - Page 3 MFJ-9412 Instruction Manual 12-Meter SSB Transceiver The MFJ-9412 monoband transceiver is designed especially for fixed or portable radio communication via the twelve-meter amateur band. Energy-efficient analog circuitry and syllabic speech processing deliver superior on-air performance while conserving valuable energy. The MFJ-9412 uses a single-conversion mixing format and a low-noise heterodyne VFO for enhanced weak-signal performance.
- Page 4 S9 or holds below S4 with normal speech, check your antenna. A VSWR of 2:1 or less is normally considered acceptable for amateur service. • Connecting a Power Amplifier: The MFJ-9412 provides a built-in FET switch to key an external amplifier. Be sure to follow all manufacturer's instructions carefully when installing an amplifier at your station.
- Page 5 MFJ-9412 Instruction Manual 12-Meter SSB Transceiver MFJ-9412 CONTROL LOCATIONS AND FUNCTION MODEL MFJ-9412 24.93 24.96 FINE TUNE VOLUME 24.89 24.99 TX KEY Front Panel 1. S-METER: Measures signal strength on receive, ALC on transmit 2. POWER SW: Applies DC power to the radio.
- Page 6 MFJ-9412 Instruction Manual 12-Meter SSB Transceiver TWELVE-METER ANTENNA SYSTEMS The better your antenna system works, the more you'll enjoy using the MFJ-9412. Here are some general tips for getting top performance: • Antenna Selection: Dipoles, ground-planes, and converted CB antennas all provide good performance for casual operation.
-
Page 7: Theory Of Operation
12-Meter SSB Transceiver THEORY OF OPERATION General: The MFJ-9412 is a 12-Watt PEP USB transceiver that tunes from 24.89-24.99 MHz. The radio's single-conversion format uses a high-frequency heterodyne VFO for superior stability, low phase noise, and circuit simplicity. The MFJ-9412 is designed for fixed or portable operation from light-weight power sources and uses all-analog circuitry throughout for reduced power consumption. -
Page 8: Internal Adjustment Locations
TRANS DRIVER DRIVE MFJ-9412 INTERNAL ADJUSTMENTS (see pictorial on next page) [1] Voltage Regulator: Adjust V-REG trimpot R78 for 10.5V on tab of U9 [18]. [2] RSSI Threshold: Adjust AGC trimpot R11 for 4.3 V at RSSI test point [16]. -
Page 9: In Case Of Difficulty
MFJ-9412 Instruction Manual 12-Meter SSB Transceiver WARNING: The tune-up information provided in this manual does not constitute a step-by-step guide for aligning the MFJ-9412. IF YOU LACK THE TEST EQUIPMENT, KNOWLEDGE, AND SKILLS TO ALIGN HF SSB TRANSCEIVERS, DO NOT ATTEMPT TO MAKE THESE ADJUSTMENTS ON YOUR OWN!! Far better to contact the MFJ factory for assistance. -
Page 10: Technical Assistance
If the manual does not reference your problem or your problem is not solved by reading the manual, you may call MFJ Technical Service at 601-323-0549 or the MFJ Factory at 601-323-5869 . You will be best helped if you have your unit, manual and all information on your station handy so you can answer any questions the technicians may ask. - Page 11 MFJ Enterprises, Inc. at the time of warranty service. MFJ Enterprises, Inc. shall have the discretion to deny warranty without dated proof-of-purchase.
- Page 12 MFJ-9412 Manual 300 Industrial Park Road Version 1A Starkville, MS 39759 Printed In U.S.A.
Need help?
Do you have a question about the MFJ-9412 and is the answer not in the manual?
Questions and answers