[TowerTalk] Perfect Field Day beam?

Pete Smith n4zr@contesting.com
Mon, 03 May 1999 09:35:36 -0400

At 08:20 AM 5/3/1999 -0400, W8JI wrote:
>Frankly, I have a hard time understanding how the TA-33 could only 
>have about 1 dB gain, and still have front to back.

>Can anyone explain how an antenna can have F/B and lose 69% of 
>the applied power without severe localized heating in the 
>traps...especially when loss can not be evenly distributed in all the 

>Somewhere almost 5 dB (69%) of the applied power is missing.

Does this necessarily follow?  Trap losses surely aren't the only mechanism
at work here.  I suspect I could all too easily build a monoband yagi that
would work just as well (or badly) as a TA-33.  Why couldn't element
spacing compromises, real-world traps, etc., all lead to a net
deterioration in both pattern and F/B?

73,  Pete N4ZR
Loud is good

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