Richard Harrison wrote:
Surely the signal follows the path of the turns on a coil.

Not entirely as adjacent turns do have an effect on
each other so there is a grain of truth in what W8JI
is saying. W8JI's error was in taking that grain of
truth and rationalizing that small grain into an
explanation that is off by at least a magnitude.

It looks like a reasonable rule of thumb is that the
velocity factor of a coil is approximately half what
it would be if the signal followed the wire entirely.
In other words, if one calculates the delay in the
length of wire used to wind the coil, the actual
delay through the coil is likely to be half of that
value.
--
73, Cecil http://www.w5dxp.com

Cecil Moore wrote:
Richard Harrison wrote:
Surely the signal follows the path of the turns on a coil.

Not entirely as adjacent turns do have an effect on
each other so there is a grain of truth in what W8JI
is saying. W8JI's error was in taking that grain of
truth and rationalizing that small grain into an
explanation that is off by at least a magnitude.

It looks like a reasonable rule of thumb is that the
velocity factor of a coil is approximately half what
it would be if the signal followed the wire entirely.
In other words, if one calculates the delay in the
length of wire used to wind the coil, the actual
delay through the coil is likely to be half of that
value.

I follow you and am in some degree of agreement--now let toss there
stones at two of us ... LOL

This is most likely a gray area because of the lack of apparatus
available to most "normal" amateurs, which can do meaningful
measurements ...

Regards,
JS

John Smith wrote:

[stuff]

Cecil Moore wrote:

[more stuff]

John Smith wrote:

[even more stuff]

Cecil:

When one is well armored and prepared to face the slings are arrows of
the religiously devout, one is able to contemplate and verbalize
personal visions/guess/questions of how the capacitive coupling and EM
coupling between turns in a humble-multi-turn coil might REALLY be
acting/interacting ... indeed, some may desire accurate formula to
describe this in finite detail, those I find are only "ball-park."

Perhaps an area for dreamers--I simply find it keeps me from bars and
loose women! :-P

Regards,
JS

John Smith wrote:
This is most likely a gray area because of the lack of apparatus
available to most "normal" amateurs, which can do meaningful
measurements ...

But what is to explain the lack of mental apparatus
available on this newsgroup? :-)
--
73, Cecil http://www.w5dxp.com