james wrote:
On Wed, 29 Jun 2005 22:58:51 GMT, "Tom Donaly"
wrote:


james wrote:


On Wed, 29 Jun 2005 16:42:49 -0500, Cecil Moore
wrote:



Sometimes yes, sometimes no. If the reflected current arrives out
of phase with the forward current, then the final dissipation can
actually be *reduced* by the mismatch.

*****

Power is power. Phase is not a problem. Take the mafnitude of the
transmitted power and teh magnitude of the reflected power. The
results are phaseless. The magnitudes add linearly.

QED

james


Cecil was talking about current, not power. You can't add
power the way you can voltage and current. If you could, you
could build a very nice perpetual motion machine just by using the
reflections in a transmission line to add power so that the output
was greater than the input.
73,
Tom Donaly, KA6RUH

******

Tom

The problem is that current is not reflected back from the load, power
is. Thus the you can add magnitudes of power.


james

Nope. You need a course in electromagnetics. Who put all these
ideas into your head, anyway?
73,
Tom