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Related Manuals for MFJ 7000
Summary of Contents for MFJ 7000
- Page 1 Model MFJ-7000 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 2009 MFJ ENTERPRISES, INC. VERSION 1A...
- Page 2 Instruction Manual Introduction The MFJ-7000 is an all in one box built for the Icom IC-7000 transceiver that allows it to become a emergency communication station. Just connect the antenna of your choice and a power source and you are ready to operate. The built in voltage conditioner allows full power SSB operation from limited power source such as a vehicle accessory plug.
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Page 3: Specifications
MFJ-7000 EmComm Emergency Communications System Instruction Manual Features • Onboard 3/8 HF antenna mount for use with mobile antennas. • Coax connector for using external mounted antennas. • Front mounted antenna selector switch. • Independent tuner memories for each antenna port. - Page 4 IC-7000. Apply maximum power only after tuning up. ● Do not transmit with a high SWR for extended periods of time. 1. The MFJ-7000 comes pre-assembled at the factory for easy initial setup. You will need only a #2 Phillips screwdriver to mount your radio.
- Page 5 4. Slide the radio in place from the front of the MFJ-7000. Make sure the rest of the connectors are pushed to the back of the unit so they do not interfere with the mounting of the radio.
- Page 6 Make sure that the power switch on the IC- 7000 is turned off when charging the capacitors. Attempting to operate the radio during the charging cycle will greatly extend the charge time and could damage the charging circuit.
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Page 7: Antenna Memory
For example, the memory resolution on the 40-meter band (7000 to 7300 kHz) is 7 kHz; if the tuner has memorized a setting for 7050 kHz, it will automatically call up this setting for any frequency from 7047 to 7053 kHz. Memory resolution is smaller at lower frequency to accommodate the higher antenna Q and larger at higher frequency where the antenna Q is lower. -
Page 8: Morse Code
L-network is properly tuned. These limits are built into the MFJ-7000 to prevent matching of extreme load impedance outside the tuner’s specification, which may result in excess voltage and/or current across the tuner’s components. -
Page 9: Antenna System Hints
MFJ-7000 EmComm Emergency Communications System Instruction Manual parallel and reasonably close to the wire that connects the tuner to the outdoor ground. The antenna feed wire should be adequately insulated to prevent arcing or accidental contact. For safety, please use good DC and RF grounds. It is particularly important to have a good RF ground when using a single wire feeder. - Page 10 MFJ-7000 EmComm Emergency Communications System Instruction Manual the tuner. This is because the mismatched feedline is an odd multiple of 1/4 wavelength long. The line inverts (or teeter-totters) the antenna impedance. A problem also occurs on 40 meters with this same antenna example. The feedline is now a multiple of a half-wave (60 to 70 feet) and connects to a full-wave high impedance antenna (100 to 140 feet).
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Page 11: Full 12-Month Warranty
MFJ Enterprises, Inc. warrants to the original owner of this product, if manufactured by MFJ Enterprises, Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free from defects in material and workmanship for a period of 12 months from date of purchase provided the following terms of this warranty are satisfied.
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