WWVB sender coil holder

This is part of a project to make a short range (like 1 meter) WWVB transmitter for use in countries like mine that don't have a government transmitter site for this clock timing service (meaning nearly anywhere not inside the USA, Japan, China, Europe, UK).
Details of the whole project will be on GitHub in more detail.
https://github.com/mr-sneezy/WWVB-Nano-Nokia_LCD

This former takes approx 30 turns of 0.4mm enamel wire. If you use thinner wire try more turns, the is no 'tuning' on this s