‰  NOW 40 WPM  ‰  TEXT IS FROM AUGUST 2008 QST  PAGES 62, 63 AND 85  ‰

GREAT AND VERY SUITABLE THROUGH 1 GHZ UP TO THE 500 W LEVEL.  I PREFER BNCS
FOR THE SMALLER CABLE AND TYPE N FOR LARGER CABLE OF THE RG 213 SIZE.  IT
IS POSSIBLE TO OBTAIN BNC CONNECTORS FOR LARGER CABLES, AND TYPE N FOR
SMALLER HOWEVER, IF WITHIN POWER RATINGS
‰  FROM PAGE 85  ‰
JH3IMR/337 G3KMA/361 N8DJX/345 DJ8CG/342 JA2JSF/351 N4TL/342 WA4VA/340

BOTHERED BY RAIN AND WILL PROBABLY LAST LONGER.  IF YOUR TUNER HAS A
PROBLEM AT ANY FREQUENCY YOU OPERATE AT, TRY CHANGING THE FEED LINE LENGTH
BY 20 FEET OR SO AND SEE WHAT HAPPENS YOU ARE LIKELY TO FIND A LENGTH THAT
WORKS ACROSS THE BAND.  JUST DONT ROLL UP ANY EXCESS.  IN MY CELLAR SHACK,
I USUALLY PUT ANY EXCESS WINDOW LINE BETWEEN THE OVERHEAD FLOOR JOISTS,
AWAY FROM OTHER WIRES AND SECURED WITH TV STANDOFF INSULATORS.  THAT SHOULD
BE A GREAT ANTENNA.  YOU MAY EVEN BE ABLE TO TUNE IT ON OTHER BANDS, IF YOU
HAVE A WIDE RANGE TUNER ESPECIALLY 30 METERS.  ON THAT BAND, THE WINDOW
LINE WILL MAKE EVEN MORE OF AN IMPROVEMENT.  Q ED, KC2QFB, ASKS WOULD
STAINLESS STEEL INSTEAD OF COPPER RODS WORK AS GROUND RODS?  I HAVE 1 INCH
DIAMETER STAINLESS STEEL PIPES THAT I COULD USE AS GROUND RODS.  ALSO, CAN
INSULATED COPPER WIRE BE USED INSTEAD OF BARE COPPER WIRE FOR GROUND
RADIALS?  AS A PRACTICAL MATTER, I DONT THINK EITHER WOULD MAKE VERY MUCH
DIFFERENCE, ESPECIALLY AS FAR AS SERVICE AS AN RF GROUND UNDER A VERTICAL
‰  FROM PAGE 85  ‰
N2BJ/343 DF3UB/338 NW6S/340 JH1MQC/336 EA5AT/342 N5ZM/344 DJ5JH/349
JA2FGL/340 N2LT/345 W9MU/344 JM1TWR/343 ON5FP/340 DK3HL/350 N3BNA/338

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 40 WPM TEXT  ‰  QST DE W1AW  ƒ