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Old September 1st 06, 09:49 PM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jul 2006
Posts: 1,614
Default Mismatched Zo Connectors

Jim Kelley wrote:
Or maybe it was just too hard for you.


It was impossible for anyone to solve without having
a math model for the sources.

How about a simpler problem then:


This is not simpler - it is contradictory. It provides a
constant power source with nowhere for the source power
to go during steady-state. If you change the source to
a Thevenin equivalent then it can be solved.

XMTR--X--one second long lossless feedline---infinite ohms
PS=100W


Please explain how the XMTR can supply 100W during steady-
state? Where does the 100 joules/sec go? As stated, this
problem, like your other one, is impossible to resolve.

If you change the source to a Thevenin equivalent 141.42V
and 50 ohm source impedance and specify Z=50 ohms feedline
impedance then the problem becomes solvable. The answer is
that 200 joules exist in the feedline and, contrary to what
W7EL states, will dissipate in the source resistance after
the source voltage goes to zero. Note the source resistance
is the only resistance in the entire circuit.
--
73, Cecil http://www.qsl.net/w5dxp
 
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