TOA is deemed to be the angle at which maximum gain occurs.
Seems like you are fishing for something, but you will not get
it from me.

Art


"Richard Clark" wrote in message
...
On Fri, 04 Mar 2005 05:24:23 GMT, "
wrote:

With my antenna having a TOA of 10 degrees

Hi Art,

All antennas have a TOA of 10 degrees. That is possibly why Reggie
(and others) generally advise that worshiping at the altar of TOA is
illusory. Without some real data, like 0.2 dBi @ 10°, simply saying
you have a TOA of 10 degrees is like trying to sell this wonderful car
because it has brakes that work.

73's
Richard Clark, KB7QHC

Charlie............I read the posts with humor as well. Sounds
like you would like to do some serious field measurements. I will say that
one year for field day two friends and myself put up a 4BTV, with 32 radials
out. We got out so well with it we took the 40M dipole down. We worked quite
a bit of DX as well, this was from a mountain top.
I think too many people sell the verticles short...............and I will
bow out at this point.

73,
WB7FFI

"Charlie" wrote in message
...
Using a Hustler 5-BTV ground mounted with 72 radials. I have heard about
antenna modeling but is there any way to do a real world take off angle
measurement???

Hi John and thx for the reply. I too used to sell verticals short and I was
mystified why anyone would admit to having a "ground mounted" vertical of
all kinds. But with a well built vertical and plenty of radials one can bust
pileups in DX...I am so pleased with my 5-BTV.

--

Charlie
Ham Radio - AD5TH
www.ad5th.com
Live Blues Music
www.492acousticblues.com




"John Franklin" wrote in message
ink.net...
Charlie............I read the posts with humor as well. Sounds
like you would like to do some serious field measurements. I will say that
one year for field day two friends and myself put up a 4BTV, with 32
radials out. We got out so well with it we took the 40M dipole down. We
worked quite a bit of DX as well, this was from a mountain top.
I think too many people sell the verticles short...............and I will
bow out at this point.

73,
WB7FFI

"Charlie" wrote in message
...
Using a Hustler 5-BTV ground mounted with 72 radials. I have heard about
antenna modeling but is there any way to do a real world take off angle
measurement???

Charlie wrote:
"Using a Hustler 5-BTV ground mounted with 72 radials. I have heard
about antenna modeling but is there a way to do a real world take off
angle measurement?"

Make a small physical model. Then use a field strength meter without a
helicopter.

Best regards, Richard Harrison, KB5WZI

Hi Richard thx for the reply but in thinking it over it would seem an
unlikely possibility that I could accurately model the 5-BTV with it's
traps. Did I miss something there?

--

Charlie
Ham Radio - AD5TH
www.ad5th.com
Live Blues Music
www.492acousticblues.com




"Richard Harrison" wrote in message
...
Charlie wrote:
"Using a Hustler 5-BTV ground mounted with 72 radials. I have heard
about antenna modeling but is there a way to do a real world take off
angle measurement?"

Make a small physical model. Then use a field strength meter without a
helicopter.

Best regards, Richard Harrison, KB5WZI

Charlie wrote:
Hi Richard thx for the reply but in thinking it over it would seem an

unlikely possibility that I could accurately model the 5-BTV with
it's
traps. Did I miss something there?

Hi Charlie, A 5-BTV with 72 radials will have about the same take off
angle as a full size vertical with 72 radials on a given band. This is
assuming the 5-BTV is operated as a 1/4 wave, current fed vertical on
all bands. If it is used as something else, say a 1/2 wave voltage fed
vertical on a given band, then the TOA should be about the same as a
full size 1/2 wave vertical.
As you can tell by other posts, actually measuring the TOA will be
difficult. If you could model full size versions of the 5-BTV on the
bands of interest on a program such as Eznec, you could find out your
TOA. As Reg asked, when you do find it out, what are you gonna do
then?
Gary N4AST