Keith Dysart wrote:
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Now we know from basic electricity that Power is Volts
times Amps, so we have:

P(x,t) = V(x,t) * I(x,t)

P(x,t) is the instantaneous power at any point and time
on the line. Power being the rate of energy flow, P(x,t)
is the instantaneous energy flow at that point and time
on the line.

If you disagree with any of the above please read no
further and post any objections now.

Good! Agreement.

Hi again Keith,

I would suggest that you add a caveat here. The power equation is true
if the measurements are across a resistance. If we are also measuring
reactive power (or reflected power), then we need to account for that.

73, Roger, W7WKB