[VicPiMakers Projects] Fwd: a couple of quick questions

[George Bowden]

Hi Jim
Dave got it from the donated parts, same as Deid. They are heltec LoRa 32
868-915

On Fri, Apr 15, 2022 at 1:07 PM James Briante <briantej at gmail.com> wrote:

> 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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-- 
George Bowden  250-893-7423
Victoria BC
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