Mike Lucas wrote:
Keith, I really like when junk science gurus exibit
constructive interference, the bafflegab sums to
four times the normal power!

Exactly in accordance with Born and Wolf's equation
(17) in their chapter on "Interference and
Interferometers". Quoting:

"In the special case where I1 = I2, (15) reduces to
I = 4*I1" [for in phase waves].

I'm sorry if you disagree with the laws of physics.
You are not alone in being ignorant of what occurs
when two coherent waves are superposed in phase.
The kicker is that we cannot have two coherent
waves superposed in phase at one location without
having two coherent waves superposed out of phase
somewhere else (assuming no local source).
--
73, Cecil http://www.w5dxp.com