On Fri, 04 Nov 2005 15:45:39 -0800, Roy Lewallen
wrote:

Richard Clark wrote:
. . .
Such an outcome stands to reason, the yagi cannot see all sources, the
dipole can. If I illuminated the yagi from each source in turn (all
others off) and correlated the response to the source's angle, the
composite would simply reveal the characteristic yagi response lobe
and the sum of those powers MUST fall below the total power available
to the dipole.


Yet if you provide the same power to the dipole and the Yagi and
integrate the total field from each, the total field powers from both
are the same.

So is reciprocity invalid?

Hi Roy,

No, the presumption:
that this specific problem supports that reciprocity
is invalid.

Feel free to exhibit that the sum of powers, from identical remote
sources, located in a locus of points equidistant from a given point,
applied to
1. a dipole;
2. a yagi
demonstrate identically recovered power.

This is not the same as applying the same power to both and
integrating at a locus of points equidistant from a given point.

I could, of course, be wrong. I will investigate further if you have
any constructive suggestions such as Jim offered. I think it would be
instructive to be able to confirm it through available tools.

73's
Richard Clark, KB7QHC