[TowerTalk] [Bulk] 80 mts four square or yagi?

[Jorge Diez - CX6VM]

of course a big thanks to K6TU for a great effort

I will need to compare like you Bill

Certainly from my location the data is not as acurate

73,
Jorge

2015-03-10 11:05 GMT-03:00 Bill via TowerTalk <towertalk at contesting.com>:

> In modeling at a possible new location I used Google Earth   for one
> direction (north) and then compared it to K6TU's files...pretty  close.
> And, the
> graphs produced were also looked pretty  similar.
>
> By the way, a tip of the hat to K6TU for making it so easy to  obtain the
> necessary input data to run the HFTA program.  Thank  you!
>
>
>
> K4XS
>
>
> In a message dated 3/10/2015 1:45:40 P.M. Coordinated Universal Time,
> cx6vm.jorge at gmail.com writes:
>
> There´s  a great difference from K6TU terrain files and files you can made
> from  Google Earth :-)
>
> At least to my  location
>
> 73,
> Jorge
>
>
> -----Mensaje original-----
> De:  TowerTalk [mailto:towertalk-bounces at contesting.com] En nombre de Pete
> Smith  N4ZR
> Enviado el: lunes, 09 de marzo de 2015 12:56 p.m.
> Para:  towertalk at contesting.com
> Asunto: Re: [TowerTalk] [Bulk] 80 mts four square  or yagi?
>
> A lot depends on what angles you need, from where you  are.  HFTA's Figure
> of
> Merit can be useful here. K6TU.net now offers  free online terrain
> profiling
> for both US and non-US locations, the latter  using SRTM data.
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network  at
> http://reversebeacon.net,
> blog at reversebeacon.blogspot.com.
> For  spots, please go to your favorite
> ARC V6 or VE7CC DX cluster  node.
>
> On 3/8/2015 5:39 PM, Grant Saviers wrote:
> > Any comparison  has to be gain vs elevation angle.  In my modeling 80m
> > yagis  & dipoles don't have sufficient low angle gain until they are up
> >  about 150'.
> >
> > A 2L 80m yagi at 150' models its gain peak as  about 12dbi at 25deg and
> > 3dbi at 5deg elevation.
> >
> > A  4sq over salt water yields about 9dbi from horizon to 25deg
> >  elevation.  Obviously, best case, so modeling is needed for every
> > design of radials and ground properties.
> >
> > Both are a  significant investment so should be carefully modeled.
> >
> > Grant  KZ1W
> >
> >
> > On 3/8/2015 10:06 AM, Jorge Diez CX6VM  wrote:
> >> Hello
> >>
> >> Wish someone have some  analysis or field test to compare a 4SQ with
> >> sixty 1/4 WL radials  each vertical and a 3 element wire yagi with
> >> boom at  115ft
> >>
> >> Which one have more  GAIN?
> >>
> >> Thanks
> >> Jorge
> >>  CX6VM/CW5W
> >>
> >> Enviado desde mi iPhone
> >>  _______________________________________________
> >>
> >>
> >>
> >>  _______________________________________________
> >> TowerTalk mailing  list
> >> TowerTalk at contesting.com
> >>  http://lists.contesting.com/mailman/listinfo/towertalk
> >>
> >
> >  _______________________________________________
> >
> >
> >
> >  _______________________________________________
> > TowerTalk mailing  list
> > TowerTalk at contesting.com
> >  http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk  mailing  list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> ---
> El  software de antivirus Avast ha analizado este correo electrónico en
> busca de  virus.
> http://www.avast.com
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk  mailing  list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>



-- 
73,
Jorge
CX6VM/CW5W