[VicPiMakers Projects] Fwd: a couple of quick questions

[James Briante]

Hello Dave,

Can  you forward photos of the front and back of the LoRa in your
possession and aso the distributor you purchased it from?

Jim

On Fri, Apr 15, 2022 at 12:19 PM Dave Gates <dbgates at gmail.com> wrote:

> Thanks Deid - will check out the videos this weekend.
>
> Dave.
> On 2022-04-14 4:30 a.m., Deid Reimer wrote:
>
> 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, 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
>>
>> --
>> Projects mailing listProjects at vicpimakers.cahttp://vicpimakers.ca/mailman/listinfo/projects_vicpimakers.ca
>>
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