‰  NOW 40 WPM  ‰  TEXT IS FROM JULY 2007 QST  PAGES 85 AND 74  ‰
TELESCOPE CONSISTS OF 16 WIDE BANDWIDTH INVERTED V DIPOLE ANTENNAS
CONNECTED TO RF COMBINERS AND A SUITE OF DIGITAL SIGNAL PROCESSING
RECEIVERS.  THE FULL SIZED LWA WILL BE MUCH THE SAME, BUT MUCH LARGER.
PLANS CALL FOR MORE THAN 13,000 INDIVIDU
‰  FROM PAGE 74  ‰
108, N7IE 100, KD4FUN, KG4YNM, KI4YV 90, NA7G 84 JANUARY W4DNA 150, W4TTO

BE USED FOR TERRESTRIAL COMMUNICATION ON THE HF BANDS.  THEY STARTED TRYING
IT ON 20 AND 40 METERS AND, BY GOLLY, IT WORKED.  EVEN WITH LOW POWER
LEVELS AND POOR BAND CONDITIONS, THESE CURIOUS HAMS MADE JT65A CONTACTS,
AND THEY ARE STILL AT IT.  I SHOULD POINT OUT THAT JT65A IS NOT DESIGNED
FOR CONVERSATIONAL CONTACTS.  ALL THAT IS EXCHANGED IS THE MINIMAL
INFORMATION NECESSARY TO CONSIDER A CONTACT COMPLETE CALL SIGNS AND SIGNAL
REPORTS.  BREVITY IS IMPORTANT WHEN YOURE TRYING TO DECODE AN EXQUISITELY
WEAK SIGNAL THAT HAS TRAVELED TO THE MOON AND BACK.  TEXT MESSAGES, UP TO
13 CHARACTERS PER TRANSMISSION, ARE SUPPORTED AS WELL.  IF YOU WANT TO GIVE
TERRESTRIAL JT65A A TRY, ALL YOU NEED IS AN SSB TRANSCEIVER, A COMPUTER
WITH A SOUNDCARD OR SOUND CHIPSET AND A SOUND CARD INTERFACE SUCH AS THOSE
YOU COMMONLY SEE ADVERTISED IN QST AND ELSEWHERE.  THE WSJT SOFTWARE IS
FREE FOR DOWNLOADING AT PHYSICS. PRINCETON.  EDU/ PULSAR/ K1JT/.  BEFORE
YOU ATTEMPT TO MAKE CONTACTS, READ THE COMPLETE BOZOS GUIDE TO HF JT65A BY
‰  FROM PAGE 74  ‰
N8DD WD8Q WB8SIQ WD8DHC KA8WNO KD7ZLF K3IN WB4BIK KI4JQB N1JX KC2PFV KC2ANN
W0CLS NY4E WA2YL W7EKB KC8WSE KA1RMV KA1GWE KG2D KB2IJH 89 W2CC 88 W8CPG
‰  QST DE W1AW  ƒ

ECLECTIC TECHNOLOGY JT65A ON THE HF BANDS WB8IMY NEVER UNDERESTIMATE A HAMS
ABILITY TO REPURPOSE A DEVICE OR TECHNIQUE.  IF CURIOSITY GETS THE BETTER
OF US, WE WONT HESITATE TO EXPERIMENT.  OUR INTERNAL DIALOGUE GOES
SOMETHING LIKE THIS YEAH, I KNOW YOURE SUPPOSED TO USE X TO DO Y, BUT WHY
NOT TRY USING X TO DO Z?  TAKE JT65A AS AN EXAMPLE.  THIS IS A DIGITAL
COMMUNICATIONS MODE DESIGNED BY JOE TAYLOR, K1JT, AND IT IS PART OF HIS
WSJT SOFTWARE SUITE.  JT65A IS NORMALLY USED FOR MOONBOUNCE, OTHERWISE
KNOWN AS EME EARTH MOON EARTH COMMUNICATION.  THIS EXOTIC PURSUIT USES THE
MOON AS A GIANT MIRROR.  BY BOUNCING RADIO WAVES OFF THE MOON, HAMS ENJOY
CONTACTS THAT SPAN THOUSANDS OF MILES HERE ON EARTH.  JT65A WAS A
REVOLUTIONARY DEVELOPMENT IN THE MOONBOUNCE WORLD BECAUSE ITS WEAK SIGNAL
DETECTION ABILITY MADE IT POSSIBLE FOR HAMS WITH MODEST STATIONS A SINGLE
YAGI ANTENNA AND ABOUT 100 W OUTPUT TO MAKE EME CONTACTS.  PRIOR TO THE
DEBUT OF THE WSJT SUITE, YOU USUALLY NEEDED LARGE ANTENNA ARRAYS AND
SERIOUS RF 1R5 KW TO ROUTINELY RICOCHET SIGNALS OFF THE LUNAR SURFACE.  SO
FAR SO GOOD, RIGHT?  WELL, SOME AMATEURS BEGAN TO WONDER WHY JT65A COULDNT
‰  FROM PAGE 74  ‰
KB2LKH W2DSX N5OUJ K7HQA K2VX WA4EIC W7GHT N8FPN NX1Q W3TWV WB2LEZ K2AN
KF6SHU 98 N7IE 97 W7VSE 96 W5GKH WD9FLJ 95 WG8Z N1LKJ N3ZOC KF7GC WB6OTS
WA5OUV 93 KB8NDS 92 N2JRS 91 AA3SB NA7G 90 W9XAN W3GQJ W8IM K1JPG KF4WIJ
‰  END OF 40 WPM TEXT  ‰  QST DE W1AW  ƒ