Cecil,

Try this out. For a line driven by a sin wave, there is a lumped parameter
equivalent circuit with impedance R + JX for any line length and any
termination. For a line exited by a pulse, this equivalent circuit is an
infinite series with nuls at n/PW; there is no length of line where the line
is resonant.

Tam/WB2TT
"W5DXP" wrote in message
...
Do steady-state signals obey one set of laws of physics and pulses
obey a different set of laws of physics?

Tarmo Tammaru wrote:
Try this out. For a line driven by a sin wave, there is a lumped parameter
equivalent circuit with impedance R + JX for any line length and any
termination.

Yes, but that's ALL it is - just an equivalent circuit. "Equivalent"
doesn't mean equivalent radiation. "Equivalent" doesn't mean equivalent
forward and reflected waves. It ONLY means equivalent NET voltage and
equivalent NET current at a point. It is a shortcut. It does NOT effect
reality. Past the net voltage and net current point absolutely nothing
is equivalent.
--
73, Cecil http://www.qsl.net/w5dxp



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