Bruce, "how do we know?"? Some of us on this group and the NanoVNA group have done this professionally for decades.? Sure, I'm? completely against tooting my own horn, but I've been using both professionally for at least 3 to 4 decades. ? In retirement, we're here to share what we've learned both through formal education and experience with others.? That's what these groups are about.
But having written that, one bit of advice:? For the most part, AVOID YOUTOOB done by others than professionals!?
