‰  NOW 20 WPM  ‰  TEXT IS FROM MARCH 2009 QST  PAGES 70, 71 AND 81  ‰

COMMONLY ENCOUNTERED REQUIREMENTS FOR MOST AMATEURS.  THERE ARE LIMITS FOR
ALL FREQUENCIES, SO FOR OTHER FREQUENCY RANGES, LOOK IN THE PREVIOUSLY
CITED REFERENCES.  THE BASIC PROCESS IS TO ENSURE THAT THE EXPOSURE TO
HUMANS FROM YOUR ANTENNA SYSTEM, OR ANY OTHER PART OF YOUR STATION, DOES
NOT EXCEED THE LIMITS.  NOTE THAT AT SIGNIFICANT DISTANCES THE FAR FIELD
FROM AN ANTENNA, THE RELATIONSHIP BETWEEN THE OUTWARD TRAVELING ELECTRIC
FIELD, MAGNETIC FIELD AND POWER DENSITY IS CONSTANT.  IF VERY CLOSE TO AN
ANTENNA, OR VERY CLOSE TO ANY REFLECTING SURFACE, THE RELATIONSHIP MAY NOT
HOLD, SO EACH QUANTITY HAS A SEPARATE REQUIREMENT.  WHILE THE DETERMINATION
OF THE EXACT FIELD STRENGTH IN THE PRESENCE OF GROUND REFLECTIONS AND OTHER
‰  FROM PAGE 81  ‰
172,874 A C N3BB 1,135,620 A C K3ZO 1,193,331 A C W4PA 931,315 A C W0EWD
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ