NEC-LIST: Re: NEC-List Digest, Vol 3, Issue 15 Coil Loading

On the subject of coil Q, I have been working on a project that required
the use of high-Q coils for efficient tuning of a short dipole and have
looked at using NEC-4.1 for modeling air-core coils using a wire
conductivity LD command to get a value for the loss in the coil. I recall
reading something by or hearing from Gerry Burke that he had
successfully used NEC to model some inductors. My models appear to
be valid and the results seemed reasonable for some conceptual coils
sizes and values, but I haven't tried building and testing a real-world coil to
check against the NEC values. Does anyone have any experience with
this? I am aware of certain NEC limitations with small loops, but the
inductor coil models seemed to work. With respect to my project, the
design has morphed to one that lets me use vacuum capacitors instead of
inductors, and here I am confident I can get a Q of 1000.

Mike Jacobs
STAR-H Corporation

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