[VicPiMakers Projects] Fwd: a couple of quick questions

[Deid Reimer]

Hi Dave, 

I don't have a spectrum analyzer, although it is on my list of things to acquire soon.

A couple of videos worth watching on building antennas.   The bottom line, if you build it to specs the vswr should be acceptable. 

https://youtu.be/eQEmFlMW50o

https://youtu.be/6cVYsHCLKq8


⁣Deid
va7rei​

On Apr. 13, 2022, 10:25 p.m., at 10:25 p.m., George Bowden <gtbowdeng at gmail.com> wrote:
>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...
>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...
>https://www.omnicalculator.com/physics/dipole is a dipole calculator,
>which
>says two wires each 16.4 cm long would make a dipole.
>Deid is the one to answer antenna questions...  He's a ham operator.
>
>---------- Forwarded message ---------
>From: Dave Gates <dbgates at gmail.com>
>Date: Wed, Apr 13, 2022 at 8:52 PM
>Subject: a couple of quick questions
>To: George Bowden <gtbowdeng at gmail.com>
>
>
>Hi George,
>
>First: does anyone in the group have a spectrum analyzer?
>
>The antenna with the LoRa modules looks like the recommended one (as
>per
>the video you sent me) but I have no way of knowing for sure... the
>video mentioned that if enough of the power sent to the antenna is
>reflected back, it can heat up and even damage the circuit.
>
>... I may be able to borrow a FLIR camera from a friend of mine - so
>second question: if a spectrum analyzer is not available, what are your
>thoughts on using a FLIR camera to avoid damage?
>
>Thanks!
>Dave.
>
>
>
>-- 
>George Bowden  250-893-7423
>Victoria BC
>
>
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>
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