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MFJ-9982 Manual

Version 1D

Printed In U.S.A.

300 Industrial Park Road
Starkville, MS 39759

MFJ ENTERPRISES, INC.

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Summary of Contents for MFJ-9982

Page 1: ...ating 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 C Model MFJ 9982 VERSION 1D 2500 Watt SSB CW Tuner Requires 9V Battery or 12V DC Source for Meter Operation ...

Page 2: ...itional handbooks or other official publications The copy of this manual provided to the customer will not be updated to reflect current data 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 M F 8 4 30 CST ...

Page 3: ...ected in tuned with tuner s matching network in line or direct no matching circuit configurations Understanding Power Ratings Load conditions and control settings greatly affect the power handling capability of the tuner T networks typically handle more power on higher frequency bands into higher load impedances The worst operating condition for T network tuners are low impedance capacitive reacta...

Page 4: ...ED meter scale Reflected power is 60 watts full scale when the 300W LO power sensitivity is selected and 600 watts full scale when the 3000W HI power scale is selected The most accurate power readings occur in the upper half of the meter scales When trying to measure power with a less than perfect match the reflected power should be subtracted from the forward power reading in order to find the tr...

Page 5: ...ided by an external 12 Vdc supply negative ground only or an internal nine volt battery 1 Locate the tuner in a convenient location at the operating position If random wire or balanced line operation is used the ceramic feed through insulators will have high RF voltages These voltages can cause serious RF burns if the terminals are touched when transmitting Be sure to locate the tuner so these ter...

Page 6: ...ance settings closest to 0 for the most power handling and the least loss Use the smallest possible inductance the smallest number possible also INCREASE the number the roller inductor is set at on a given frequency to INCREASE the matching range Remember this LOWERS the efficiency and power handling capability of the tuner After making this setting adjust the capacitors for minimum SWR 1 Tune the...

Page 7: ...tenna Following this guideline will ensure maximum power handling capability and efficiency and the least critical tuning adjustments Recommended Tuning Chart Frequency MHz Transmitter Inductor counter indicator Antenna Load ohms 1 8 0 57 5 5 50 1 8 0 90 0 600 2 0 1 5 52 6 50 2 0 0 79 0 600 3 5 1 24 6 50 3 5 5 48 0 600 3 75 1 5 23 6 50 3 75 5 46 0 600 4 0 1 5 21 6 50 4 0 5 5 44 0 600 7 15 0 16 6 5...

Page 8: ...ansmit with a high SWR for extended periods of time In Case Of Difficulty If the tuner fails to tune please double check all connections and follow the tuning procedures again Be sure you are using enough inductance low enough counter number and have the capacitors open far enough higher front panel numbers If the tuner arcs at the rated power levels please double check all connections and follow ...

Page 9: ...ator 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 Location For the best performance an end fed longwire wire antenna should be at least one quarter wavelength l...

Page 10: ...s 160 meters dipole 35 60 170 195 or 210 235 feet Avoid 130 260 ft 80 meters dipole 34 40 90 102 or 160 172 feet Avoid 66 135 190 ft 40 meters dipole 42 52 73 83 112 123 or 145 155 feet Avoid 32 64 96 128 ft Some slight trimming or adding of feedline may be necessary to accommodate the higher bands WARNING To avoid problems a dipole antenna should be a full half wave on the lowest band On 160 mete...

Page 11: ...meter Adjust the HI FWD trim pot to set the forward power scale to 1000 Watts 6 To set the reflected power interchange the TRANSMITTER and ANTENNA coax cables so that the transmitter is connected to the ANTENNA connector and the dummy load is connected to the TRANSMITTER connector 7 With the 3000 300 Watts button pushed out for the 60 Watt reflected scale Transmit 10 Watts as indicated on the refe...

Page 12: ...o maintain a smooth feel while tuning Lubrication is applied to the bearigs on both ends of the inductor during manufacturing Lubricating oil can be used on these bearings Lubricant may be applied to the inside shaft and wheel Only use a lubricant such as gun bore oil or electrical contact spray NEVER APPLY LUBRICANT ONTO WINDING OF THE ROLLER INDUCTOR HI FWD LO REF HI REF LO FWD ...

Page 13: ...se 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 1 8 1 8 2 0 2 0 3 5 3 5 3 5 3 75 3 75 3 75 4 0 4 0 4 0 7 15 7 15 10 1 10 1 14 2 18 1 18 1 21 2 21 2 24 9 28 5 ...

Page 14: ...MFJ 9982 2500 Watt Antenna Tuner Instruction Manual 12 Schematic ...

Page 15: ...to cover postage and handling 4 This warranty is NOT void for owners who attempt to repair defective units Technical consultation is available by calling 662 323 5869 5 This warranty does not apply to kits sold by or manufactured by MFJ Enterprises Inc 6 Wired and tested PC board products are covered by this warranty provided only the wired and tested PC board product is returned Wired and tested ...

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

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