Greetings Ed!

 LF>>> A director leads an orchestra when playing music. Radials are those
 LF>>> "elements" that are excited when radiating RF.
The only thing
 LF>>> confusing about this are the molecs who're heating up those radials
 LF>>> because of their activity.

 HG>> The exited elements are named radiators or driven elements.

 RW>> Yes, in a yagi or dipole.

 HG>> The reflector(s) and director(s) are parasitic elements.

 RW>> No, they're mirrors and orchestra leaders. I think of your
 RW>> version of reflectors as RF image deflectors and your directors
 RW>> as RF guidence elements. Especially in a yagi antenna. Not so
 RW>> much as in a LPDA, as only some of the elements are excited,
 RW>> while those which are not in use for a radiated RF signal at a
 RW>> frequency in the design limitations of the particular antenna
 RW>> are not.

 EV> Howdy! Roy, Lisa and Holger,

 EV> On page 609 of my copy of the A.R.R.L. The Radio Amateurs Handbook,
 EV> 1976 version.

 EV> Under the Topic "DIRECTIVE ARRAYS WITH PARASITIC ELEMENTS"
 EV> Sub-Topic "Parasitic Excitation"
 EV> In the Second Paragraph it has the words "parasitic",
"director" and
 EV> "reflector".

 EV> Did the A.R.R.L delete that info from the 1977 'Handbook' You have?
 EV> I Think Not!

But, the subject of 'Directive Arrays with Parasitic Elements' is all
about Antennas and the author assumed that everybody who reads it knows
the nomenclature. Had a person with no antenna knowledge at all, they
could just as easily have been misled by the use of those words.

 EV> 73, or is that suppose to be Ten Roger Good Four Buddy?

30-12 GB or if you're more advanced, then it is 60-24 MGB...


    Have a day!

         R\%/itt - K5RXT

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