Portable QRP 20m vertical amateur radio antenna
thingiverse
Latest version of the remix of the original design. This time the antenna rod was bought from aliexpress and the nut is very common: https://www.aliexpress.com/item/1005002500129013.html?spm=a2g0o.order_list.0.0.12fa1802KfD3gW The nut holds the rod from the inside of the coil. The top end of the coil wire must exit the top where it will be soldered/held by pressure by the antenna rod. The rest is self explanatory...
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