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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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</blockquote>
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