=  NOW 20 WPM  =  TEXT IS FROM AUGUST 2023  QST  PAGE 52 =

OCTAVE AND 1/3 OCTAVE EQUALIZERS.  THE 1 OCTAVE GRAPHIC EQUALIZER HAS A
CONTROL THAT ADJUSTS THE AUDIO AT EACH OCTAVE ACROSS THE AUDIO SPECTRUM,
GENERALLY HAVING 10 CONTROLS.  THE 1/3 OCTAVE GRAPHIC EQUALIZER HAS THREE
TIMES AS MANY CONTROLS, WHICH CAN BOOST OR ATTENUATE 30 DIFFERENT PARTS OF
THE AUDIO SPECTRUM.  A MAJORITY OF THE CONTROLS OF MOST GENERAL AUDIO
GRAPHIC EQUALIZERS ARE UNUSABLE FOR HAM RADIO PURPOSES.  FOUR OF THE 10
CONTROLS ON A 1 OCTAVE EQUALIZER AND 13 OF THE 30 CONTROLS ON A 1/3 OCTAVE
EQUALIZER WILL BE USABLE WITHIN THE HAM BANDWIDTH.  MOST UTILIZE SHORT
THROW SLIDE POTENTIOMETERS, WHICH CAN GIVE YOU A VISUAL DISPLAY OF YOUR
EQUALIZATION CURVE.  BUT BECAUSE MOST OF THIS CONTROL IS OUTSIDE THE HAM
AUDIO BANDWIDTH, SEVERAL MANUFACTURERS HAVE RECENTLY COME UP WITH GRAPHIC
=  END OF 20 WPM TEXT  =  QST DE W1AW  <