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It may be "super weird", but I'm seeing the same thing. My antenna
is at 450'; the Paine antenna is at 750', and the distance between
the two is almost exactly 26400'. That's a rise of 300' in 26400',
and the arc-sine of that ratio (0.0113636) is .65 degrees. However,
for optimum results, I have my antenna also aimed about 5 degrees
above the horizon. I don't remember the exact results when I aim at
less than one degree, but it's significantly less.<br>
<br>
<div class="moz-cite-prefix">On 2014-05-22 13:28, Bart Kus wrote:<br>
</div>
<blockquote cite="mid:537E5DEC.8080008@bartk.us" type="cite">
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<div class="moz-cite-prefix">That's super weird. You might wanna
try moving the mount up/down the mast while keeping the dish
level. And yes, microwaves can be mysterious until you get
experience with them. That's one big advantage of doing a
project like this, it gives hams motivation to learn how to deal
with 6GHz and such.<br>
<br>
--Bart<br>
<br>
<br>
On 5/22/2014 1:03 PM, Kenny Richards wrote:<br>
</div>
<blockquote
cite="mid:CAHEUKbL6hxPJco7Oeu7EWk2pMWvJ+4dRgHdMH4Y09Vo+B0RjnQ@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">Bart,</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">
<span style="font-family:arial">>Would you like some
tower climbing / install help? That's some crazy uptilt
on the antenna picture you showed!</span><br>
</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">
Thank you for the offer, but I think it can wait until I'm
healed. This was 'minor' knee surgery and I should be back
to working out in six weeks, so I'm sure climbing the
tower will be doable by then. We are at the very beginning
of tower climbing season.... </div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">The
crazy uptilt required was the source of most of my
headaches. From that exact location, I will hear nothing
with the antenna at the normal 'level' mount point. You
need to tilt it up about five degrees or more before CP
will register. It never occurred to me that it would have
that big of impact. Microwaves are weird....</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">Thanks<br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">
Kenny</div>
<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Wed, May 21, 2014 at 11:54 PM,
Bart Kus <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:me@bartk.us" target="_blank">me@bartk.us</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Dean,<br>
<br>
I wouldn't limit your potential upside to 3dB with
... "spatial modulation". :) The vast majority of
your path loss is NOT due to distance. If you did
achieve clear (or better) LoS, you could be looking
at 30dB deltas. Remember we've had Baldi-Tacoma (a
far longer distance than yours) run at -57dBm during
a signal survey. K7JMM, across the Puget Sound
(about 3x your distance) is running at -58dBm right
now.<br>
<br>
Kenny,<br>
<br>
Would you like some tower climbing / install help?
That's some crazy uptilt on the antenna picture you
showed!<span class=""><font color="#888888"><br>
<br>
--Bart</font></span>
<div>
<div class="h5"><br>
<br>
<br>
On 5/21/2014 9:27 PM, Kenny Richards wrote:<br>
</div>
</div>
</div>
<div>
<div class="h5">
<blockquote type="cite">
<div dir="ltr">
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">Dean,</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">
I'm slightly less mad at you, but still a
little peeved. :-) </div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">
The shot to Capital Park from my house goes
through quite a few tree's in my immediate
area. (All within a couple blocks from me)
When I originally installed the tower about
10 years ago, I was able to see downtown
from the top of it. Now I can't, due to the
trees of the neighbor directly behind me and
his neighbor. </div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">That
said, I don't actually have the HamWAN
antenna mounted on the tower yet. I had to
postpone that installation until my knee
heals up. (Had the meniscus repaired in my
left knee last week) Right now the antenna
is mounted to a small mast at the apex of
the roof. (It is sharing the mast with a
VHF/UHF vertical) </div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">I
thought that I'd posted links to these
pictures before, but I guess not. </div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">Picture
of current installation: <a
moz-do-not-send="true"
href="http://www.ku7m.net/drop/KU7M_HamWAN.JPG"
target="_blank">http://www.ku7m.net/drop/KU7M_HamWAN.JPG</a></div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">Picture
of what I'm shooting through to get to
Capital Park: <a moz-do-not-send="true"
href="http://www.ku7m.net/drop/KU7M_CPView.JPG"
target="_blank">http://www.ku7m.net/drop/KU7M_CPView.JPG</a></div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">And
just because it makes me laugh, the
installation from the first night it started
working: <a moz-do-not-send="true"
href="http://www.ku7m.net/drop/DeckAntennaMount.jpg"
target="_blank">http://www.ku7m.net/drop/DeckAntennaMount.jpg</a></div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">The
difference in signal strength from the
antenna being on the deck railing to its
current location is ~5 dB. The height
difference between the to location is about
eight to ten feet. When moving the antenna
to the roof the first time, I had originally
installed it on a mast located at the far
east side of the roof. In this spot I could
not hear CP at all. By moving the antenna to
the mast located in the center of the house
(which is about 20-25 feet west), the signal
appeared and has so far been the best
location. I ordered another mast mounting
kit for the eve located at the far west side
of the house. When I'm feeling better I'll
install it and see if the signal improves
again when moving west. </div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">I
don't have many data points on the impact of
wind on the signal strength. I did check it
on Sunday when a system blew through which
was causing the trees to noticeable move.
But I wasn't seeing much change in the
signal strength. (maybe 1 db?) </div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">Thanks</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small">
Kenny</div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Wed, May 21, 2014
at 7:44 PM, Dean Gibson AE7Q <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:hamwan@ae7q.com"
target="_blank">hamwan@ae7q.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
First of all, Kenny: welcome! Now that
you have a HamWAN connection, I hope you
are no longer mad at me. Where is your
antenna (inside/outside, height above
ground, etc)?<br>
<br>
On a related but more serious side, do
you have a direct line-of-sight path to
Capitol Hill, or do you go through
trees? The reason I ask is, my path
goes through some trees. When it is
windy, that causes my RX signal level
(dBm value) to vary about 5 dB (mostly
down). I have wondered whether mounting
my antenna higher would help my overall
value (of course it would help when it
is windy).<br>
<br>
My average RX signal level is 80 dBm (no
winds), and yours appears to be 83 dBm.
However, you are twice as far from your
cell site as I am from mine, and since
power falls off as the square of the
distance, I'd expect (in similar
configurations and siting) that you
would experience a 6 dB difference.
Since the difference is only 3 dB, that
suggests that (all things being equal,
which they never are) I might gain <b>at
most</b> 3 dB by moving the antenna.<br>
</div>
<br>
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