John Smith wrote:
Cecil Moore wrote:
John Smith wrote:
There is SOMETHING we are ALL missing ... but, I do listen to your
arguments, I admit--I have a hard time following you ...

Well, let's take a simple example. Given a lossless
90 degree stub. What is the phase shift in the total
current from one end of the stub to the other?

Hmmm, 360? No, 180? Hmmm, 90? Well, 89.999999999999999999?
Ok, I give up, tell me ... :-)

In a lossless stub, the *total current* is 100%
standing-wave current. There is zero phase shift
in the current from one end of the stub to the other.
That's why total current cannot be used to measure
a delay through a coil in a standing-wave antenna.
--
73, Cecil http://www.w5dxp.com

Cecil Moore wrote:

...
In a lossless stub, the *total current* is 100%
standing-wave current. There is zero phase shift
in the current from one end of the stub to the other.
That's why total current cannot be used to measure
a delay through a coil in a standing-wave antenna.

Cecil:

Of course you are correct--it was meant to be a joke man, albeit a silly
one ...

Regards,
JS

John Smith wrote:
Of course you are correct--it was meant to be a joke man, albeit a silly
one ...

Sorry, I didn't know you were joking. Some pretty intelligent,
educated people on this newsgroup do not know the answer else
they would never try to use standing-wave current to measure
the phase shift through a loading coil.
--
73, Cecil http://www.w5dxp.com

Cecil Moore wrote:


That's why total current cannot be used to measure
a delay through a coil in a standing-wave antenna.

Not even if the frequency is known and there's a standing wave current
loop at one end of the coil and a standing wave current node at the
other end?

73, ac6xg

Jim Kelley wrote:

Cecil Moore wrote:
That's why total current cannot be used to measure
a delay through a coil in a standing-wave antenna.

Not even if the frequency is known and there's a standing wave current
loop at one end of the coil and a standing wave current node at the
other end?

Total current phase is the context of my posting above.
We were talking about total current phase, not total
current amplitude. To be precise, the statement should
read: "That's why total current phase cannot be used
to measure a delay through a coil in a standing-wave
antenna". It is difficult to post context-free English.

W8JI and W7EL both used standing-wave current *phase* to
try to determine the delay through a coil. That is an
invalid measurement concept. If they had used the standing-
wave current amplitude instead to calculate the phase
shift, they would have gotten much closer to a valid
result. But they are arguing about current amplitude
drops which are simply relative phase shifts between
the forward and reflected current.
--
73, Cecil http://www.w5dxp.com