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PRIMARY AND AUXILIARY NOTCH FREQUENCY AND SELECTIVITY CONTROLS.  I FOUND
THAT A NOTCH DEPTH OF ABOUT 20 DB WAS QUITE EASY TO ACCOMPLISH, AND THIS
GAVE ENOUGH VOLUME REDUCTION TO MAKE THE INTERFERING SIGNAL REASONABLY
INSIGNIFICANT.  FINALLY, I LOOKED AT THE NOISE LIMITER.  THE SSB NOISE
LIMITER CLIPS NOISE PEAKS ABOVE THE AVERAGE AUDIO LEVEL, BUT THE INPUT
SIGNAL MUST BE AT LEAST 0R7 V PEAK FOR PROPER OPERATION.  THE CW NOISE
LIMITER REMOVES LOWLEVEL BACKGROUND NOISE BETWEEN RECEIVED DITS AND DAHS,
BUT THE RECEIVER AUDIO INTO THE MFJ 752D MUST BE SET SUCH THAT THE SIGNAL
IS PASSED BUT THE NOISE IS BLOCKED.  IF THE AUDIO LEVEL IS TOO LOW, THE
SIGNAL IS BLOCKED.  IF THE AUDIO LEVEL IS TOO HIGH, NOISE GETS THROUGH AND
THE FILTER MAY BE OVERLOADED.  I FOUND BOTH NOISE LIMITERS TO WORK WELL AND
I PARTICULARLY LIKED THE CW NOISE LIMITER.  HOWEVER, THE VOLUME LEVEL
NEEDED FOR PROPER OPERATION WAS NORMALLY NOT TO MY LIKING.  IF THE MFJ 752D
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ