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Re: My NanoVNA is overheating


 

On Fri, Jul 17, 2020 at 12:29 AM, igor-m wrote:


As I indicated in one of my posts, my new H4 crashes with
0.8.4.7fw every 10-15mins
0.8.4.6fw every 10-15mins
0.8.4.5fw does not crash.
all at around 25degC ambient. I haven't mess with the threshold. You may try a
different firmware..
I built the latest H4 fw version (pulled from Dislord's github 1.5h back) with sdcard and 32kHz xtal.
Soldered xtal and socket in, flashed the fw in (shows old fw version on the LCD).
Set time (do not use leading 0), set vbat offset, re-calibrated my 4 ranges.
Did a measurement and saved s-data and LCD-shot - it works !! :)

Bad news - it crashed after about 5 minutes (the usb cable disconnected, voltage 4.17V).
It shows messy data, but the system works.

Q/A: What could be the difference between v 0.8.4.5fw (which works stable here), and the latest???

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