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<p>Thanks Deid - will check out the videos this weekend.</p>
<p>Dave.<br>
</p>
<div class="moz-cite-prefix">On 2022-04-14 4:30 a.m., Deid Reimer
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:fc06b996-5bf8-44ef-83fb-7ca224a61049@drsol.com">
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<div dir="auto">Hi Dave, <br>
<br>
</div>
<div dir="auto">I don't have a spectrum analyzer, although it is
on my list of things to acquire soon.<br>
<br>
</div>
<div dir="auto">A couple of videos worth watching on building
antennas. The bottom line, if you build it to specs the vswr
should be acceptable. <br>
<br>
</div>
<div dir="auto"><a href="https://youtu.be/eQEmFlMW50o"
moz-do-not-send="true" class="moz-txt-link-freetext">https://youtu.be/eQEmFlMW50o</a><br>
<br>
</div>
<div dir="auto"><a href="https://youtu.be/6cVYsHCLKq8"
moz-do-not-send="true" class="moz-txt-link-freetext">https://youtu.be/6cVYsHCLKq8</a><br>
<br>
<br>
</div>
<div dir="auto"><!-- tmjah_g_1299s -->Deid<!-- tmjah_g_1299e --><br>
</div>
<div dir="auto"><!-- tmjah_g_1299s -->va7rei<!-- tmjah_g_1299e --></div>
<div class="gmail_quote">On Apr. 13, 2022, at 10:25 p.m., George
Bowden <<a href="mailto:gtbowdeng@gmail.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">gtbowdeng@gmail.com</a>>
wrote:
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div dir="ltr">Hi Dave. I've forwarded your query to the
projects group. That is the best place to get a response,
where more people can see it...
<div>I dont think a spectrum analyser is needed. You could
attach a dipole of the right length, depending on the
frequency you choose for the lora . at 915 mhz it could
be made from a couple pieces of copper wire, attached with
a uFL to the lora module, if that is what it has...</div>
<div><a href="https://www.omnicalculator.com/physics/dipole"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.omnicalculator.com/physics/dipole</a>
is a dipole calculator, which says two wires each 16.4 cm
long would make a dipole.</div>
<div>Deid is the one to answer antenna questions... He's a
ham operator.</div>
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">---------- Forwarded
message ---------<br>
From: <strong class="gmail_sendername" dir="auto">Dave
Gates</strong> <span dir="auto"><<a
href="mailto:dbgates@gmail.com"
moz-do-not-send="true"
class="moz-txt-link-freetext">dbgates@gmail.com</a>></span><br>
Date: Wed, Apr 13, 2022 at 8:52 PM<br>
Subject: a couple of quick questions<br>
To: George Bowden <<a
href="mailto:gtbowdeng@gmail.com"
moz-do-not-send="true" class="moz-txt-link-freetext">gtbowdeng@gmail.com</a>><br>
</div>
<br>
<br>
Hi George,<br>
<br>
First: does anyone in the group have a spectrum
analyzer?<br>
<br>
The antenna with the LoRa modules looks like the
recommended one (as per <br>
the video you sent me) but I have no way of knowing for
sure... the <br>
video mentioned that if enough of the power sent to the
antenna is <br>
reflected back, it can heat up and even damage the
circuit.<br>
<br>
... I may be able to borrow a FLIR camera from a friend
of mine - so <br>
second question: if a spectrum analyzer is not
available, what are your <br>
thoughts on using a FLIR camera to avoid damage?<br>
<br>
Thanks!<br>
Dave.<br>
<br>
</div>
<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr">George Bowden 250-893-7423
<div>Victoria BC</div>
</div>
</div>
</div>
</div>
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</pre>
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