On Apr 3, 9:38*pm, Tom Horne wrote:
I realize this may be a terribly basic question but at any given
transmitter power will the highest current measured in the antenna feed
line occur at the lowest SWR or not.
--
Tom Horne

"This alternating current stuff is just a fad. *It is much too dangerous
for general use." *Thomas Alva Edison

At the lowest SWR, 1:1, the steady-state RMS current along a lossless
transmission line is everywhere the same. At high SWR, the steady-
state RMS current along a lossless line varies between some high value
and some low value; the SWR is the ratio of the high value over the
low value, assuming the line is long enough that you won't find higher
or lower by extending the length of the line.

If the antenna feedpoint impedance is, say, 10 ohms and you feed it
100 watts, you should measure sqrt(10) amps at the feedpoint. You'd
have a 5:1 SWR on a 50 ohm line with that load. With a 250 ohm load,
you'd also have a 5:1 SWR on the same line, but the current at the
antenna end for 100 watts delivered to the antenna would be sqrt(0.4)
amps, or 1/5 as much current. If the antenna represents a 50 ohm load
on the same 50 ohm line (swr = 1:1), the current is sqrt(2) amps for
100 watts, an intermediate value.

Hope that helps (and that I haven't screwed up my mental arithmetic).

Cheers,
Tom