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I receved one that reached india in march and no issues. .
I cut the outer cover and disposed off.

I am safe, so far. Lol

Sarma vu3zmv

On Mon, 18 May 2020, 4:03 pm Ron Spencer via groups.io, <ron.spencer=
[email protected]> wrote:

I'd think if you did a cal for the typical hf range of freq (1.8Mhz to
say 30Mhz) you'd likely be OK. The swr reading may be off a little but when
tuning an antenna you're looking for the swr dip. The nanovna may show a
different swr than actual. As long as you understand this going in I'd
think you would be OK. It will be precise but not accurate.