"Sparks" wrote in message
...
It IS STORECASTING in ALL instances in Florida. It is 45 degrees.
You-All are missing the true fact in the USA, "Most" stations use dual
polorized antenni and a very large number use circular. Broadcast
Consultant

Ok, that makes some sense then, but what's the advantage of sitting the
antenna at 45 then?
It should work as well at any angle, as long as it's pointed the right way.

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"Dave" =3D=3D Dave VanHorn writes:

[... Sparks talks about storecasting ...]

Dave Ok, that makes some sense then, but what's the advantage of
Dave sitting the antenna at 45 then? It should work as well at any
Dave angle, as long as it's pointed the right way.

Sitting the antenna at 45 degrees drops the level of vertically- and
horizontally-polarized noise 3db, I believe.

Jack.
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Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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Sitting the antenna at 45 degrees drops the level of vertically- and
horizontally-polarized noise 3db, I believe.

Sounds like a conservation of energy violation.
Assuming noise is randomly polarized. ..

I think something's still not clear here.

Sounds like a conservation of energy violation.
Assuming noise is randomly polarized. ..

I think something's still not clear here.



You have to be more specific, what kind of noise, source, how far.
Then what it is attached to or radiated by. The "antennas" can add polarization
as well as propagation.
Noise can be point source, omnidirectional, omnipolarized, but also "massaged"
by the surroundings and "antennas" attached to it or in vicinity. Ever chased
power line noise along the power lines?

Yuri, K3BU

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"Dave" =3D=3D Dave VanHorn writes:

Jack Sitting the antenna at 45 degrees drops the level of vertically-
Jack and horizontally-polarized noise 3db, I believe.

Dave Sounds like a conservation of energy violation. Assuming noise
Dave is randomly polarized. ..

I do not share your assumption that noise is randomly polarized.

The majority of noise I encounter is man-made and vertically
polarized. There is a great deal of horizontally polarized noise as
well. Natural noise may be randomly polarized, but that's the
minority in my experience.

Dave I think something's still not clear here.

It makes sense to me.

Jack.
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Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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Well..... The origional question was "What is the 45 degree antenni
seen on mostly commercial eating places ect. That has been answered.
I'm slowley recovering from a heart attack last week and will let the
antenna experts stomp through the grass with the why's, where fores, and
other "stuff" that can make interesting reading for a few weeks.
Regards, Sparks

"Jack Twilley" wrote in message
...

Sitting the antenna at 45 degrees drops the level of vertically- and
horizontally-polarized noise 3db, I believe.

Jack.
- --
Jack Twilley
jmt at twilley dot org

Jack,

My original point was that if you drop the vertical and horizontal gains
each by 3 db, the sum gain is still 0 db.

BTW, people talk about Muzack in fast food restaurants. Never saw a fast
food restaurant with Muzack. It is something else.

Tam/WB2TT

BTW, people talk about Muzack in fast food restaurants. Never saw a fast
food restaurant with Muzack. It is something else.

As a former Muzak installer, I can assure you, they do.


I'm still skeptical on the idea that most noise is either vertical or
horizontal, and that rotating an antenna 45 deg will cut both by 3dB

Also, this would be an FM service, where such noise would normally be
insignificant.