The 96th revision of my Windows coil calculator has improved accuracy
for self-resonant frequency and proximity effect. Results are much more
accurate for short coils. N6LF is using the program to optimize
high-efficiency loops for 2200-meter receiving arrays.
COIL calculates inductance and Q for solenoids made of solid or Litz
wire. It models a number of copper and aluminum alloys and form
dielectrics. The program handles dielectric ribs (Air Dux) or ridges
(steatite), axial or radial leads, and U.S. or metric units. COIL can
automatically maximize coil Q while keeping inductance constant. It can
provide results as an RLC model for wideband circuit or antenna
analysis. To validate accuracy, the documentation compares calculated
values with hundreds of inductance and Q measurements made with an HP
4342A Q meter on dozens of coils.
http://ham-radio.com/k6sti/coil.zip
Brian
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