‰  NOW 35 WPM  ‰  TEXT IS FROM SEPTEMBER 2015 QST  PAGE 53‰

USING THE MFJ 752D ALL MFJ 752D INPUTS AND OUTPUTS ARE LOCATED ON THE REAR
PANEL.  A CABLE CONNECTS YOUR RECEIVERS SPEAKER OUTPUT OR HEADPHONE JACK TO
ONE OF THE MFJ 752DS RCA AUDIO INPUTS, AND A 4 16 SPEAKER CONNECTS TO THE
MFJ 752D SPEAKER OUTPUT A PHONO JACK.  EITHER MONO OR STEREO HEADPHONES MAY
BE PLUGGED INTO THE 3R5 MM HEADPHONE JACK.  PLUGGING IN HEADPHONES WILL NOT
MUTE THE SPEAKER OUTPUT.  FINALLY, 9 18 V DC CONNECTS TO THE 2R1 MM COAXIAL
DC JACK.  AS YOU CAN SEE FROM THE PHOTO AND TABLES, THE MFJ 752D HAS MANY
DIFFERENT FILTER OPTIONS MEANING A LOT OF ADJUSTMENTS, SOME OF WHICH ARE
INTERACTIVE.  SO THERE IS A LEARNING CURVE IN ORDER TO ACHIEVE THE BEST
PERFORMANCE.  I FOUND IT EASIEST TO START WITH THE PRIMARY FILTER, USING
JUST THE PEAK FUNCTION.  IT WAS EASY TO ADJUST THE PRIMARY FILTER FREQUENCY
AND SELECTIVITY CONTROLS FOR THE BEST SOUNDING AUDIO IN THE PRESENCE OF
CLOSE IN INTERFERENCE.  WHEN ADDITIONAL SELECTIVITY WAS REQUIRED, I ENABLED
THE PEAK MODE OF THE AUXILIARY FILTER AND ADJUSTED THE AUXILIARY FREQUENCY
AND SELECTIVITY CONTROLS FOR BEST PERFORMANCE.  I COULD QUICKLY HOME IN ON
THE BEST SOLUTION BY GOING BACK AND FORTH BETWEEN THE PRIMARY AND AUXILIARY
FILTER CONTROLS.  KEEP IN MIND THAT THIS IS AN AUDIO FILTER, SO A STRONG
INTERFERING SIGNAL CAN CAPTURE YOUR RECEIVERS AGC.  I FOUND THAT IF THE
INTERFERING SIGNAL WAS AT LEAST 6 DB BELOW THE DESIRED SIGNAL, AGC CAPTURE
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