<html><head></head><body style="zoom: 0%;"><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">https://youtu.be/eQEmFlMW50o</a><br><br></div>
<div dir="auto"><a href="https://youtu.be/6cVYsHCLKq8">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">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">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">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">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>
<pre class="blue">-- <br>Projects mailing list<br>Projects@vicpimakers.ca<br><a href="http://vicpimakers.ca/mailman/listinfo/projects_vicpimakers.ca">http://vicpimakers.ca/mailman/listinfo/projects_vicpimakers.ca</a><br></pre></blockquote></div></body></html>