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Old March 23rd 06, 10:10 AM posted to rec.radio.amateur.antenna
Cecil Moore
 
Posts: n/a
Default Current through coils

K7ITM wrote:

Cecil wrote,
"The forward current is equal at both ends of the coil. The reflected
current is equal at both ends of the coil."

If that's really true, then the net current is precisely equal at both
ends of the coil.


I was speaking above about the magnitudes only, not the phases.
It was clear from the rest of my posting that was the assumption.
The fact that you attempted to change the meaning by trimming is
noted.

So to be perfectly clear, here is my statement re-worded using
a 45 degree phase shift through the coil.

The forward current magnitude is equal at both ends of the coil.
The reflected current magnitude is equal at both ends of the coil.

At the bottom of the coil, the forward current is 1 amp at zero deg.
At the bottom of the coil, the reflected current is 1 amp at zero deg.
At the bottom of the coil, the standing wave current is 2 amps at
zero deg.

At the top of the coil, the forward current is 1 amp at -45 deg.
At the top of the coil, the reflected current is 1 amp at +45 deg.
At the bottom of the coil, the standing wave current is 1.4 amp at
zero deg.

I asked if you knew how to do phasor math but you trimmed out that
phasor math part of my posting.
--
73, Cecil http://www.qsl.net/w5dxp