Coax Trap Form

# coax-trap-form
Parametric OpenSCAD model for making coil forms for coax-traps for wire antennas.
The official home for these files is [https://github.com/SmittyHalibut/coax-trap-form](https://github.com/SmittyHalibut/coax-trap-form)
(Sorry Thingiverse, you're just a point-in-time snapshot when I think to make it.)
Look to github for the newest versions of all this.

Pictures on Thingiverse show a few different parametric options. These are just examples, you can make any form you want:
1. RG8/X, 6.25 turns, 3.1in diameter form (This is the only STL included.)
1. RG58, 6 turns, 2in diameter form
1. RG58, 6.5 turns, 2in diameter form

# Electrical Design
Electrical design from the 2015 ARRL Antenna Handbook
page 10-15, section 10.2.2, "Five Band W3DZZ Trap Antenna"
The idea is a trap resonant at 7.2MHz, which natively builds a 40/80m
antenna. But the series capacitance in the trap allows the total antenna
length to resonate at 20, 15, and 10m as well, at higher harmon