=  NOW 5 WPM  =  TEXT IS FROM APRIL 2023 QST PAGE 57  =

1970S, MANUFACTURERS PERMANENTLY POLARIZED THE DIAPHRAGM SO THAT THE HIGH
VOLTAGE SUPPLY WAS NO LONGER REQUIRED.  MOST OF THE PROFESSIONAL VERSIONS
OF THIS MICROPHONE STILL USE A POLARIZING SUPPLY, WHICH IS ALMOST ALWAYS
<  QST DE W1AW  =
APPLIED THROUGH THE MICROPHONE CONNECTION FROM THE PREAMPLIFIERS PHANTOM
SUPPLY, WHICH PROVIDES THE BIAS VOLTAGE ACROSS THE ELEMENT AND POWERS THE
=  END OF 5 WPM TEXT  =  QST DE W1AW  <