Cecil Moore wrote:

Jim Kelley wrote:


Cecil Moore wrote:

Of course, I regularly obtain 200 watts of forward
power from my 100 watt IC-706. It's all due to
constructive interference.


Nice try, but you're kidding yourself if you think you're getting 200
watts out of an IC706.


As anyone can readily see, I did NOT say I was "getting
200 watts out of my IC706" so your attempt at obfuscation
is obvious. I said "I regularly obtain 200 watts of forward power
from my 100 watt IC-706". Here is my exact configuration
for my 33' rotatable dipole based on actual measurements
on 20m.

Then your observation was unrelated to the topic of discussion, which
was your claim that 2 Joules per second could be obtained from a 1
watt laser. It must have been offered as a diversion.

Heck, on 17m, I regularly obtain 350 watts of forward power
using a 100W IC-706 as the source.

It's certainly an impressive meter reading. It is your contention
then that interference caused a 250 Joule per second increase in the
amount of energy being produced by your radio? If not, then this must
also have been offered as a diversion.

Back to the laser example, the answer you can't seem to get right is
that, recombing the split beam back into one beam will at best recover
1 watt of laser power. That's the limit allowed by conservation of
energy as it happens.


That's true for average power, Jim, and I have never said otherwise.

You can't average power 'going' one direction with power 'going' in
some other direction. That doesn't even make sense. If you
integrate all of the energy, from all the bright fringes it still
doesn't exceed the energy coming from the source.
There is no amount of hand waving that can cause a one watt laser to
deliver 2 Joules of energy per second.

But if we observe interference rings, the bright rings can contain
all the power while the dark rings contain none. Thus, the bright
rings represent *double the average power* just as Born and Wolf report.

Born and Wolf doesn't discuss power and interference, and they
certainly don't interchange intensity and power in their discussions
like you do. There can be no more 'power gain' along a transmission
line than there can be along a beam of light. With respect to
antennas one can obviously observe an increase in power in a
particular direction given the fact that antennas do in fact
redistribute energy by generating an interference pattern. But even
with all the interference and power averaging taken into
consideration, the radiated power will still not exceed the input power.

You can't get 400 watts to a load using two 100 watt PA's no matter
how much interfering and averaging you do, Cecil. How can you even
make that claim with a straight face?

Shirley, that is not beyond your comprehension.

Quite honestly it does seem to be beyond yours. And please stop
calling me Shirley. :-)

73, Jim AC6XG