‰  NOW 35 WPM  ‰  TEXT IS FROM AUGUST 2008 QST  PAGES 62, 63 AND 85  ‰

THE DOCTOR IS IN PROJECTS AND INFORMATION FOR THE ACTIVE AMATEUR  Q MEL,
K8MIW, ASKS I HAVE A QUESTION ABOUT FEEDING A FOLDED DIPOLE, SPACED ABOUT 5
INCHES BETWEEN WIRES.  WHAT WOULD BE THE DIFFERENCE BETWEEN FEEDING IT WITH
THE USUAL 300 O TWIN LEAD AND USING THE POPULAR 450 O WINDOW LINE AS A FEED
LINE?  I OPERATE MOSTLY ON 75 METERS.  YEARS AGO I USED A FOLDED DIPOLE AND
FOUND IT TO BE AN EFFECTIVE AND WIDE BAND ANTENNA.  I HAVE HEAVY DUTY
WINDOW LINE ON HAND, BUT WOULD HAVE TO BUY THE TWIN LEAD AND THE ONLY LINE
I CAN FIND IS LIGHT DUTY LINE.  WOULD THE MISMATCH WITH THE 450 O LINE
CAUSE ANY PROBLEMS?  A THE MOST SIGNIFICANT DIFFERENCE WOULD BE THE LEVEL
OF MISMATCH AT THE TRANSMITTER END.  IF YOU ARE USING AN ANTENNA TUNER, I
DOUBT THAT YOU WILL NOTICE ANY DIFFERENCE AT ALL.  THERE WILL ACTUALLY BE
SLIGHTLY LESS LOSS WITH THE 450 O USUALLY CLOSER TO 400 O IN MY EXPERIENCE
LINE.  LETS SEE, IF THE ANTENNA IS ABOUT 0R25 HIGH, THE ACTUAL FEED
IMPEDANCE WILL BE CLOSER TO 200 O THAN TO THE FREE SPACE VALUE OF 300 O.
WITH 300 O LINE THAT RESULTS IN A 1R5 1 SWR AT RESONANCE, OR 2 1 WITH 400 O
LINE.  I WOULD GO AHEAD AND USE THE WINDOW LINE.  IT SHOULD BE LESS
‰  FROM PAGE 85  ‰
N4VB/347 DJ4ZB/350 JA1PUK/347 N0TB/354 W9BF/342 JJ3AFV/340 OK1ABB/344
DJ9HX/341 N0ABE/340 DF2UU/338 NN1N/340 JH1BAM/334 EA4DX/342 N5TY/349
DJ5AV/343 JA2DDN/349 N2DXJ/338 W9LA/361 JL1UXH/336 ON4DM/382 DK2OC/347

‰  END OF 35 WPM TEXT  ‰  QST DE W1AW  ƒ