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?