‰  NOW 35 WPM  ‰
THE COMPACT QUAD MULTIBAND HF ANTENNA AN EASY TO BUILD LOOP WITH A SIMPLE
MATCHING SECTION OFFERS FOUR BAND HF COVERAGE.  ANDREW ROOS, ZS6AAA WHEN I
RELOCATED TO JOHANNESBURG I NEEDED A NEW MULTI BAND HF ANTENNA.  SINCE I
WAS STAYING IN A RENTED HOUSE, A TOWER WAS OUT OF THE QUESTION, BUT
FORTUNATELY MY LOVELY WIFE HAD TAKEN MY NOT SO SUBTLE HINTS AND GIVEN ME A
SPIDERBEAM 39 FOOT TELESCOPIC POLE FOR MY BIRTHDAY.  THE POLE IS MUCH
STIFFER THAN A FISHING ROD, BUT STILL ONLY SUITABLE FOR A VERY LIGHTWEIGHT
ANTENNA.  THIS RULED OUT TRAP DIPOLES SUCH AS THE W3DZZ, AS THE TRAPS WOULD
HAVE BEEN TOO HEAVY.  THE GARDEN, WHICH MEASURED ONLY 66 X 46 FEET, WAS TOO
SMALL TO ACCOMMODATE A G5RV.  THE LOCATION OF THE SHACK ON THE OPPOSITE
SIDE OF THE HOUSE FROM THE GARDEN MADE AN OPEN WIRE FED DOUBLET
IMPRACTICAL.  I RULED OUT MOST OF THE STANDARD MULTIBAND HF ANTENNAS AND
DECIDED TO DEVELOP MY OWN.  A CLOSED LOOP SEEMED TO BE A GOOD STARTING
POINT SINCE LOOPS ARE NATURALLY RESONANT ON ALL MULTIPLES OF THEIR
FUNDAMENTAL FREQUENCY.  THIS MATCHES THE HARMONIC RELATIONSHIPS BETWEEN THE
MOST POPULAR AMATEUR BANDS.  THEY CAN BE FED AT THE BOTTOM OF THE LOOP, SO
‰  FROM PAGE 96  ‰
KJ9I/342 KK0M/341 KK0U/345 KK2I/346 KL7J/342 KL7RA/349 KN0V/344 KN4F/343
KP4BJD/352 KQ9W/341 KR5C/347 KR9U/341 KT9T/353 KU4J/346 KY7M/344 KZ2P/344
LA2QM/341 LA4CM/350 LA5XGA/341 LA7QI/349 LA7SI/342 LA8XM/341 LA9XG/341
‰  END OF 35 WPM TEXT  ‰  QST DE W1AW  ƒ