<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 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 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 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 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 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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