MFJ -969 DELUXE Versa Tuner II Instruction Manual Download Page 10 | Manualshive

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MFJ-969 DELUXE Versa Tuner II

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Summary of Contents for -969 DELUXE Versa Tuner II

Page 1: ...k or average FORWARD power REFLECTED power and SWR The wattmeter is active in all ANTENNA SELECTOR positions To use the wattmeter without using the MFJ 969 tuning circuits select one of the ANTENNA SELECTOR positions under BYPASS NOTE The meter ON OFF switch must be ON for the meter circuit to function The MFJ 969 wattmeter circuit does not function accurately if the Auto Tuner in your radio is us...

Page 2: ...ale when the 30W power sensitivity is selected This scale has a picket every 5 watts above 10 watts and at each watt below 10 watts The reflected scale is also divided by 10 when using the 30W switch position When trying to measure power with a less than perfect match the reflected power should be subtracted from the forward power readings The SWR is read directly from eleven red SWR curves that r...

Page 3: ...ators can operate with high RF voltages These voltages may cause serious RF burns These high RF voltages may also damage anything contacting or within a half inch of the terminals 3 Install the MFJ 969 between the transmitter and antenna Use a 50 ohm coaxial cable to connect the transmitter or transceiver to the SO 239 UHF female labeled TRANSMITTER on the back of the tuner 4 Coaxial feedlines att...

Page 4: ...rt in the tuning instructions shows typical ROLLER INDUCTOR settings for each amateur band NOTE If your transmitter uses an adjustable output circuit it must be properly tuned into a 50 ohm load at the operating frequency Proper tuning can be accomplished by placing the ANTENNA SELECTOR switch in the fully clockwise BYPASS DUMMY LOAD position Adjust the transmitter according to the manufacturer s ...

Page 5: ... 7 15 4 1 2 4 1 2 107 10 15 6 6 112 14 15 6 1 2 6 1 2 116 18 2 7 7 118 21 1 8 8 119 24 9 8 1 2 8 1 2 119 28 5 9 9 121 50 2 9 1 2 9 1 2 123 3 Apply just enough power on CW or AM FM RTTY to obtain noticeable deflection on the reflected power meter 4 Carefully adjust the ROLLER INDUCTOR and ANTENNA controls for the lowest reflected power NOTE These controls interact Adjust the ROLLER INDUCTOR for min...

Page 6: ... you are using enough inductance a higher ROLLER INDUCTOR number and have the capacitors open far enough a higher front panel number If this tuner arcs at the rated power levels please double check all connections and follow the tuning procedures again Be sure you are using the largest amount of capacitance and lowest amount of inductance lowest ROLLER INDUCTOR TRANSMITTER and ANTENNA numerical se...

Page 7: ... the use of woven or braided conductors in RF and lightning grounds unless the lead needs to be flexible Antenna Hints WARNING For operator safety a good outside earth ground or water pipe ground should ALWAYS be installed and connected to the case of the MFJ 969 Make certain the safety ground also connects to the transmitter and other station accessories A wing nut post marked GROUND is provided ...

Page 8: ...i band antenna add or subtract 1 8 wave of feedline for the band that won t tune and try again 4 Never try to load a G5RV or center fed dipole on a band below the half wave design frequency If you want to operate an 80 meter antenna on 160 meters feed either or both conductors as a longwire against the station ground To avoid problems matching or feeding any dipole antenna with high impedance line...

Page 9: ... MFJ Factory at 662 323 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 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 Send a complete description of your prob...

Page 10: ...MFJ 969 DELUXE Versa Tuner II 10 Schematic ...

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