Bruce:
You might have caused the AD602 devices to open, as they have almost zero
protection, aside from a capacitive input.
The level of R.F probably killed them.
The devices are readily available, and not costly,
There should be 3 devices, all identical.
SA602AD, 8 pin D.I.P packaging
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On Mon, Nov 2, 2020 at 6:43 AM BruceN <k4tql@...> wrote:
Did a stupid. I was measuring an antenna and left the VNA connected to
the feed line while I went off and did something else for a bit. My
automatic message system kicked off and transmitted from a different
antenna pouring 100 watts into the aether. The antennas were close,
parallel in fact.
When I came back to the VNA, I found that I couldn't calibrate it. The
display showed traces all over the place instead of the nice straight lines
you get after calibration. I guess I may have bricked it but would
re-loading the firmware correct the issue? I hate to dig into it because
it is a "real" nanoVNA-H with the nice plastic case and kinda tough to
break into. I suspect that repairing it wouldn't be worth the trouble
since a new one is so inexpensive.
Moral of the story: turn off all RF sources while using the VNA and
disconnect it if you walk off to do something else.
--
*"To invent, you need a good imagination and a pile of junk"* -- Thomas
Alva Edison (1847-1931)
