[TowerTalk] Tower height increments

[Dick Green WC1M]

EZNEC gives similar results -- a 40-2CD at 69 feet has a radiation angle of
27 degrees, while the same antenna at 79 feet has a radiation angle of 24
degrees. Three degrees wouln't be worth the work to me. However, if you can
get a 40-2CD to 110 feet, the angle comes down to 17 degrees. That would
probably be worth it.

73, Dick WC1M

> -----Original Message-----
> From: W3YY [mailto:w3yy at cox.net] 
> Sent: Saturday, October 16, 2004 3:40 AM
> To: TowerTalk List
> Subject: Re: [TowerTalk] Tower height increments
> 
> 
> Warren -
> 
> Using HFTA and modeling a 2-el 40-m beam over flat ground, 
> the lobe moves from an elevation angle of about 29 deg at 
> 69ft to 25 deg at 79ft.  It's probably not worth going 
> through a lot of extra work to obtain this change.
> 
> 73, Bob - W3YY
> 
> ----- Original Message ----- 
> From: <WarrenWolff at aol.com>
> To: <towertalk at contesting.com>
> Sent: Saturday, October 16, 2004 7:15 AM
> Subject: [TowerTalk] Tower height increments
> 
> 
> > Greeting fellow TTalkers,
> >
> > I have an interesting question.
> >
> > Does anyone know what happens to the radiation lobes for a 
> 40  meter 
> > yagi when it height above the ground is changed from 69 feet to 79  
> > feet?  It boils down to whether or not the extra 10 feet is really 
> > worth  it --- or
> the
> > potential hassle from a City Engineer for the extra 10  feet.
> >
> > Regards,  Warren Wolff; W5KKW
> >
> >
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> 
> 
> 
>