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- Page 1 Dual Band Tuner Model MFJ-923 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 2012 MFJ ENTERPRISES, INC. VERSION 1B...
- Page 2 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.
- Page 3 INSTALLATION The MFJ-923 antenna tuner was designed with today’s dual band radios in mind. This unit has a single input connector so that it ill easily connect to your dual band transceiver. Two output connectors give you the option of using a dual band antenna or two single band antennas for maximum performance.
- Page 4 (B) If using two single band antennas, connect the two meter antenna to the connector marked 146MHz. Connect the 440 antenna to the connector labled 440MHz. Move the switch to “two single band” 440MHz 146MHz Radio REFLECTED 146MHz 440MHz METER LAMP TRANSMITTER POWER...
- Page 5 OPERATION This antenna tuner operates slightly different than most manual tuners do. You will notice that there are five tuning knobs on the front of the unit and one switch for the power level and band selection. The band selection and power switch simply adjust the sensitivity of the watt meter to the correct frequency and power level indicated on the dial.
- Page 6 NOTES:...
- Page 7 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 term s of this warranty are satisfied.
- Page 8 MFJ ENTERPRISES, INC. MFJ-923 Manual Version 1B 300 Industrial Park Road Printed In U.S.A. Starkville, MS 39759...
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