Reg Edwards wrote:
If Line-1 has impedance Zo1 and is a fractional wavelength L1 long,

and Line-2 has impedance Zo2 and is a fractional wavelength L2 long,

then when both lines are connected together and are brought into
so-called 1/4-wave resonance by pruning the length of one of the
lines, it is IMPOSSIBLE for L1 + L2 to equal 1/4-wavelength or 90
degrees.

If we have three sections and Z02 Z01,

---Z01---+---Z02---+---Z01---

the first impedance discontinuity causes a phase
shift in the *opposite* direction from the second
impedance discontinuity. That's why moving a loading
coil from a base-loaded position to a center-loaded
position requires more degrees of coil.

W8JI has been trying to make a big deal out of that
fact but it is just simple physics.
--
73, Cecil http://www.qsl.net/w5dxp