[Antennas] re:Gamma

[Jim & MK]

  Alan,
      I believe you mentioned straight sections of tubing 
for your Yagi elements as opposed to tapered.  In the ARRL 
Antenna Book (reference 19th edition), it talks about 
calculating the tapered length using Dave Leeson, W6NL's 
software.  Dave has a book, Physical Design of Yagi 
Antennas, that addresses this issue.
      As for the gamma match, there is an excellent article 
in the May/June 1999 issue of QEX by G4JNH, Ron Barker, "A 
New Look at the Gamma Match."
      Hope this helps.
  73,
  Jim, W7FKI

  ----- Original Message ----- 
  From: "Alex Eban" <alexeban at bezeqint.net>
  To: "'Alan Hughes'" <zl3kr at ihug.co.nz>; "'antennas'" 
<antennas at mailman.qth.net>
  Sent: Wednesday, January 12, 2005 11:54 PM
  Subject: RE: [Antennas] re:Gamma


  > Yes, the elements get a bit shorter and this is where an 
antenna impedance
  > meter comes in handy. I don't know of such a conversion 
formula, but since
  > you use straight tubing, recalculate the lengths with 
the handbook formula.
  > Should get close enough.
  > Alex 4Z5KS
  >
  > 
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