On Wed, Jul 5, 2023 at 12:30 PM, alan victor wrote:
Second, in looking at your solenoid coil, the L/D ratio looks wrong for
optimum Q. Something like L/D of 0.5 to 1 per Terman is better served for Q.
Rules of thumb are handy, but today it's easy to directly optimize a coil design. The first image show's Mike's coil. The second shows it after optimizing turns and coil length. The third is after optimizing turns, coil length, and coil diameter. Q could be further improved by using thicker wire. The optimizer uses the Differential Evolution algorithm.
I suspect that the dielectric loss of your coil is secondary.
Form loss shows the loss in the coil form as a percentage of total loss.
The coil program is here:
Brian
