Cecil Moore wrote in message ...
Mark Keith wrote:
This is the way I view it, and why I couldn't automatically endorse
the fairly large difference they saw. Unless the coil is very long,
say as in a helical whip, I see it acting pretty much as a lumped
inductor. Sure, the current may vary some through the coil when it's a
foot or so long bugcatcher coil, but I don't see it being a major
issue. I wouldn't normally expect to see a sharp current taper across
the coil. I see that type of coil acting much as a "one piece" lumped
inductor, not as a many turned rf roller coaster ride. Not a perfect
lumped inductor, but close enuff for average gov work. MK

The round trip current phase shift in an electrical 1/4WL vertical must
total 360 degrees. If the coil doesn't perform part of that phase shift,
what does?

What if it does though? If the coil is still a fairly small portion of
the overall length, I don't see the change as severe. Heck, if current
is supposed to be the same on each end of the coil, it should be the
same going in both directions.. Seems to me it would pretty much
equal out in the overall scheme of things. Even if one ends up with a
bit more current, being the coil is not that large overall, the
difference should not be drastic. Or to my thinking anyway..I think
it's quite possible a coil mounted higher than 1/2 the total length
shows a sharper cutoff of current at it's end. To me , it's because of
the shorter overall length of the stinger above the coil. The current
taper at the top of the coil and above is more abrupt than if the coil
were center loaded. Or thats the way I see it. Whether it's right or
wrong remains to be seen... MK