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Receive antenna construction

C

CaptBob92

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Inactive User
Many years ago I had a copy of a catalog from Scala. Among other things it included some very interesting information on how to place two yagi or maybe it was beam receiving antennas so as to pickup an FM station while nulling out competing signals closer in than 90 degrees. As I remember, the two antnnas were stacked but one was placed slightly behind the other and a special harness insured that the combination created a null. The distance behind that one antenna maintained or the length of the harness, I forget which, controlled where the nulls came up.

Does anybody still have a copy of that or know what I'm talking about?
 
We had to do this years ago, so I just went and found my (very valuable) old Scala catalog, with Tech Notes.
But, with no way to copy it.....I found this current copy, on line:

http://www.kathrein-scala.com/catalog/Broadcast_Catalog_C27-B.pdf

Look around pages 127 to 130'ish on the PDFs, and you'll find the Tech Notes on nulling and on increasing F/B ratio.

While on their website, you may want to download some of their calculators, too.
 
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