Mark Keith wrote:
Cecil Moore wrote:
A 13% error is small? The error is even larger than that for the current
at the top of the coil.

I don't know where this 13% comes from, but how many db difference
would it make in the modeling results?

Uh Mark,
1 dB error = 13% error 10^(0.1) = 1.26
2 dB error = 29% error 10^(0.2) = 1.58
3 dB error = 50% error 10^(0.3) = 2.00

I know you have said it multiple times, but so far I don't recollect
anyone actually measuring a real world coil, and finding max current
at the top of the coil. That is what is bothering me. MK

Nobody builds an antenna that way but consider the following monopole.
Ground is at the left, top is at the right. Each of the following
1/4WL sections are electrical 1/4WL's.

1/4WL coil
Gnd-FP------1/4WL tubing------//////////------1/4WL stinger------

max--*-------------------------------*-------------------------
* * *
* * *
Current min-------------------*----------------------------------*

The current at the feedpoint will be high. The current at the bottom of
the coil will be low. The current at the top of the coil will be high.
The current at the tip of the antenna will be low.
--
73, Cecil http://www.qsl.net/w5dxp



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