[TowerTalk] 10 meter antenna

[n4kg@juno.com]

A 1976 antenna book reference ?  

You are WAY out of date for Yagi design.

Get some MODERN antenna books and learn to use
modeling programs.

Simplistic formulas such as  500 / f  are only good for
ONE diameter (which you did not specify).  TAPER
is not even considered in such formulas. 

The answers to all of your questions are in the 
TowerTalk archives.  

The velocity (factor) VF of RG-213 is 0.66

This sounds like an April Fool's question.

If you don't want to update your knowledge base,
you would be better off buying commercial antennas.

I'm putting on my flame suit now.

de  Tom  N4KG




On Sat, 26 Aug 2000  Renegade <wb6psy@earthlink.net> writes:
> 
> Hi ya'all - as I have the Antenna Handbook dated 1976, there must've
> been some changes since.  I'm looking for the velocity for RG213U.
> 
> I'm also looking for the formula for a 5 el parasitic array length 
> and element spacing if they still use, e.g.
> Reflector:  Length (ft) = 500 ÷ ƒ (mhz).
> 
> Last question (for now) is what do people use today to coat (or not) 
> the elements that slip into each other and boom connections?  
> WD40, Silicone, etc., or nothing?  Comments please!
> 
> 73 de Rene
> 
> --
>  Renegade
>  - from the Peoþles Reþûblïç of Winnetka
> 
> mailto:WB6PSY@qsl.net     <or>
> mailto:tagteam@qualityservice.com
> http://www.qsl.net/wb6psy/
> dx club:  http://www.scdxc.org/
> eFax: 413 228-7736           E-:-)
> The “Gene Pool” has no lifeguards
> 

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