Tdonaly wrote:
as delta t goes to zero, the quantity dx/dt doesn't necessarily
also go to zero. If it did, no one would ever again have to get a permanent
headache studying calculus.

I am familiar with limits. Some make sense and some don't. The impedance,
frequency, and SWR of a transmission line with an SWR doesn't make sense
as V goes to zero and I goes to zero. Any old piece of transmission laying
in the yard has zero volts and zero amps. What is the SWR? What is the
frequency? What is the Z0 of the line?
--
73, Cecil http://www.qsl.net/w5dxp



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