On Tue, 06 Apr 2004 11:48:53 GMT, Dave Shrader
wrote:

Richard Clark wrote:

On Mon, 05 Apr 2004 23:54:51 GMT, Dave Shrader
wrote:

Theoretically, the loss is about 0.5 to 1.0 dB for clear glass.


Hi Dave,

What's the theory?

73's
Richard Clark, KB7QHC

My EM guys, Physics types, [from my working days] indicated that the
three dielectric interfaces, adhesive to glass to adhesive, all with
different dielectric coefficients create reflections at the boundaries.

Hi Dave,

Poor theory. Reflection is not loss. There are reflections galore on
a radiator that supports the Standing Wave and yet with a large enough
metal surface it is nearly 100% radiative.

As for this boundaries explanation, those "Physics types" clearly did
not have any working knowledge (experience) - about as useful as
Cecil's poorly offered Light analogies suffering from the same lack.
I further note that none of this indicts clear glass (which may have
been a semantic issue) to the tune of nearly 1dB.

73's
Richard Clark, KB7QHC