Designing Self Resonant Coils for Antenna Traps and Chokes

A lowly coil of wire can be surprisingly difficult to understand and model correctly.  I use coils of wire or coils of coax cable as trap inductors for various antenna designs that I have built.  In the low frequency limit, the traditional inductance calculations work okay and can give you a pretty good estimate of [...]

Practical Antenna Modeling

Here are the slides for a presentation given to The Valley Radio Club on May 3, 2019. The hope is that the slides contain enough detail that the reader could easily build and run the examples in 4NEC2. Practical Antenna Modeling Power Point Presentation Practical Antenna Modeling PDF format slides Using the NEC Codes With Examples [...]