‰  NOW 20 WPM  ‰  TEXT IS FROM OCTOBER 2018 QST  PAGE 32‰

RESISTORS AND CONNECT THE DIPOLE ELEMENTS.  ELEMENT LENGTHS FROM 30
CENTIMETERS TO ABOUT 90 CENTIMETERS SHOULD WORK.  LONGER LENGTHS MAY CAUSE
INSTABILITY IN THE PREAMPS OR OVERLOAD BY STRONG LOCAL AM BROADCAST
STATIONS.  SENSITIVITY STARTS TO FALL OFF SIGNIFICANTLY WITH ELEMENT
LENGTHS SHORTER THAN ABOUT 30 CENTIMETERS.  PERFORMANCE EXTENSIVE TESTING
WAS DONE WITH VARIOUS DIPOLE ELEMENT LENGTHS AND VARIOUS VALUES OF INPUT
RESISTANCE ON THE PREAMP USING 60 KHZ SIGNALS FROM WWVB ABOUT 1,500
KILOMETERS FROM THIS LOCATION, NONDIRECTIONAL BEACON FCH AT 344 KHZ ABOUT
300 KILOMETERS FROM THIS LOCATION, AND SEVERAL BROADCAST STATIONS BOTH
LOCAL AND SEVERAL HUNDRED KILOMETERS AWAY.  WITH LONG ELEMENTS AND HIGH
INPUT RESISTANCE, AND IN THE PRESENCE OF STRONG AM BROADCAST SIGNALS, THE
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ