The case is this error still eclipes your 0.1dB by a vast margin.

73's
Richard Clark, KB7QHC

Look.. you're asking for specifics and details. That's out of scope
for a discussion like this. In the context of a discussion list, to
which all of us contribute as an avocation (at least, I suspect that
nobody is getting paid to participate in rec.anything), I assert, with
some casual backup, that it is possible for an amateur to make power
measurements such as those to validate a NEC model to an accuracy of
0.1dB. You assert that it isn't, and ask that I provide details beyond
my casual assertion.

We can go back and forth about metrology, but, realistically, I'm not
about to go dragging out data sheets and doing an uncertainty analysis
which is of very little value to me, personally, and realistically, of
little value to anyone on this list.

As with many precision measurement problems, the method has to fit the
thing being measured, so to spend a lot of time and effort on any
arbitrary contrived example (such as the one in this thread) isn't
necessarily going to be general or applicable to any other examples.
So why beat ourselves up about it.

The folks who pay me seem to be happy with the measurements I do (and
I assure you, I do measurements or generate signals to better
precision than we've been talking about here, some are even published
in the peer reviewed literature) . The folks who pay you are
presumably happy with the measurements you do. Neither of them pay us
to solve ham radio's problems.

Pace,

Jim