Roger wrote:
Cecil Moore wrote:
Roy Lewallen wrote:
v(t, x) = 2 * cos(x) * sin(wt)

At any particular time t=N, what is the variation
in phase for any x between 0 and 90 degrees? If
the variation is zero, how can such a signal be
used to measure delay?

The equation is a correct equation for describing a standing wave.
It is not describing a signal.

Roy thinks it is describing a signal and so does W8JI.
It's the signal current they both used to "measure" the
delay through a 75m bugcatcher loading coil.

Having measured the voltage at two x points, from the equation I could
find the rotational angle of the wave at both points. The difference
between the two angles would be the distance of wave travel assuming the
standing wave was composed of traveling waves.

But that's not what Roy did. He measured the difference
in phase between two current measurements in a standing-
wave environment and declared that lack of phase difference
to be the "delay". He did NOT measure amplitude and calculate
backwards to get the delay. That's what I said he should
have done and he ploinked me.
--
73, Cecil http://www.w5dxp.com