MFJ -9982 Instruction Manual
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MFJ -9982 Instruction Manual

2500 watt ssb / cw tuner
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2500 Watt SSB / CW Tuner
Model MFJ-9982
INSTRUCTION MANUAL
Requires 9V Battery or 12V DC Source for Meter Operation
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
C
COPYRIGHT
2006 MFJ ENTERPRISES, INC.
VERSION 1D

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Summary of Contents for MFJ MFJ-9982

  • Page 1 INSTRUCTION MANUAL Requires 9V Battery or 12V DC Source for Meter Operation 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 2006 MFJ ENTERPRISES, INC. VERSION 1D...
  • Page 2 Customers using this manual should report errors or omissions, recommendations for improvements, or other comments to MFJ Enterprises, 300 Industrial Park Road, Starkville, MS 39759. Phone: (662) 323-5869; FAX: (662) 323-6551. Business hours:...
  • Page 3 Instruction Manual Introduction The MFJ-9982 is a high power antenna tuner that will operate at power levels up to 2500 watts SSB or CW. The MFJ-9982 uses an edge would roller inductor in a matching “T” network to continuously tune loads between 1.8 and 30 MHz.
  • Page 4 12 Vdc source, such as the optional MFJ-1312D power supply, may be used. The rear panel jack accepts a 2.1 mm coaxial plug with the center conductor positive (+) and the sleeve negative (-).

  • Page 5: Installation

    MFJ-9982 2500 Watt Antenna Tuner Instruction Manual Antenna Selector The ANTENNA SELECTOR allows you to select 2 rear panel SO-239 coaxial connectors either direct or through the tuner, a 50 ohm dummy load, and single wire or balanced feedline antennas. The 50 ohm DUMMY LOAD can be used for 10 minutes at a power level of 100 watts and a maximum of 10 seconds at 1.5kw.

  • Page 6: Operation

    MFJ-9982 2500 Watt Antenna Tuner Instruction Manual A. Coaxial feedlines attach to the connectors labeled COAX 1 and COAX 2 on the rear panel of the tuner. The ANTENNA SELECTOR switch on the control panel allows the user to select a DIRECT (bypasses the matching circuit) or a TUNED (includes the matching circuit) transmitter to antenna connection.

  • Page 7: Operating Notes

    MFJ-9982 2500 Watt Antenna Tuner Instruction Manual Advance the power (do not exceed 100 watts) and, if necessary, touch up the ANTENNA and TRANSMITTER controls for minimum reflected power and maximum forward power (lowest SWR). Remove the power. After adjusting the tuner for minimum SWR, an amplifier may be turned on. The METER switch should be placed in the HI position, and the amplifier tuned according to the manufacturer's instruction.

  • Page 8: In Case Of Difficulty

    MFJ-9982 2500 Watt Antenna Tuner Instruction Manual your rig, try changing the length of the antenna or feedline to bring the impedance within the tuning range of the tuner. When adjusting the tuner, use the lowest number on the TRANSMITTER and ANTENNA controls and the lowest number on the INDUCTOR control that produces a good SWR.

  • Page 9: Antenna System Hints

    For operator safety, a good outside earth ground or water pipe ground should always be installed and connected to the case of the MFJ-9982. Make certain the safety ground also connects to the transmitter and other station accessories. A wing nut post marked GROUND is provided for ground connection(s).

  • Page 10: Technical Assistance

    You can also send questions by mail to MFJ Enterprises, INC., 300 Industrial Park Road, Starkville, MS 39759; by Facsimile (FAX) to 662-323-6551; or by email to techinfo@mfjenterprises.com.

  • Page 11: Meter Calibration

    1. Refer to Figure 1 for the Test Setup and refer to the PCB layout in Figure 2 for trim pot location. 2. Remove the top of the MFJ-815C. 3. Connect the Test Setup equipment as shown in Figure 1. Use a 50-ohm dummy load for the antenna.
  • Page 12 MFJ-9982 2500 Watt Antenna Tuner Instruction Manual LO REF LO FWD HI REF HI FWD Figure 2: PCB Layout and Trim Pot Location Roller Inductor Lubrication Over time the roller inductor may require lubrication to maintain a smooth feel while tuning.
  • Page 13 MFJ-9982 2500 Watt Antenna Tuner Instruction Manual Logged Tuning Chart Use the chart below to log values for your station. You may want to copy this chart and post it by your tuner. Frequency (MHz) Transmitter Inductor (counter indicator) Antenna 3.75...
  • Page 14 MFJ-9982 2500 Watt Antenna Tuner Instruction Manual Schematic...

  • Page 15: 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.
  • Page 16 MFJ ENTERPRISES, INC. MFJ-9982 Manual 300 Industrial Park Road Version 1D Starkville, MS 39759 Printed In U.S.A.

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