=  NOW 30 WPM  =  TEXT IS FROM AUGUST 2023  QST  PAGE 52 =

YOUR CALL SIGN CAN PIERCE THROUGH A PILEUP.  THIS IS ACCOMPLISHED BY
PUTTING MAXIMUM ENERGY INTO THE FREQUENCIES OF YOUR TRANSMISSION THAT
CONVEY INTELLIGIBILITY.  THIS MAY MEAN THAT YOUR AUDIO WONT SOUND AS
NATURAL AS IT WOULD IF YOU WERE HAVING A LONG CONTACT ITS MORE ABOUT THE
TRANSFER OF INFORMATION.  DIFFERENT TYPES OF EQUALIZATION THERE ARE
NUMEROUS TYPES OF EQUALIZATION, EACH HAVING A PLACE IN RECORDING,
BROADCASTING, SOUND ENFORCEMENT, AND HAM RADIO.  CUTOFF FILTER THE SIMPLEST
FORM OF EQUALIZATION IS THE CUTOFF FILTER, OFTEN REFERRED TO AS HIGH PASS
AND LOW PASS FILTERS.  THERE ARE ALSO NOTCH FILTERS THAT ATTENUATE A
SPECIFIC FREQUENCY, BUT THEYRE RARELY USED IN HAM TRANSMISSIONS.  THE HIGH
PASS AND LOW PASS FILTERS ARE COMMON IN MOST TRANSCEIVERS.  THE AUDIO
PREAMPLIFIER IN MOST TRANSCEIVERS IS LIMITED BELOW A CERTAIN FREQUENCY,
GENERALLY ABOUT 150 TO 300 HZ, AND LIMITED ON THE OTHER END, BETWEEN 2800
AND 3200 HZ.  THIS IS ONLY A FRACTION OF THE RESPONSE OF THE HUMAN EAR, OR
THE RESPONSE OF A HIGH END MICROPHONE.  BECAUSE THE RESPONSE IS SO LIMITED,
ITS ALL THE MORE IMPORTANT TO MAKE THAT RESPONSE AS PRODUCTIVE AS POSSIBLE.
=  END OF 30 WPM TEXT  =  QST DE W1AW  <