On Sat, Sep 24, 2022 at 03:05 PM, John KN5L wrote:
Correct, As wire spacing decreases, there is skin effect squeezing,
which will increase RF resistance.
?I would think that is why my 5 coil test does not show that a 15 TPI coil would have the highest Q and it shows Q starts to drop at 12TPI,
at least with coils wound with 660/46 on a 6" form.
Looked at wire chart, #46 is skin saturated in this frequency range.
Therefore wire Q is a function of frequency.
?? That's the design criteria of Litz wire, use all the available copper for current flow, without having any copper with less current density, then just add more wires
to reduce losses.
? Your latest graph is now taking the shape of the 5 coil graph I posted.
