Helpful article on the properties of various 3D-printing plastics:
https://www.3dnatives.com/en/plastics-used-3d-printing110420174/
Check the dielectric constant and dissipation factor of the plastic in
this comprehensive library:
http://www.plasticfantasticlibrary.com/library/plastic/
The microwave oven test is unreliable. Some materials have high loss at
HF and low loss at UHF, and vice versa.
Household plastic containers make good coil forms. Guide to identifying
the plastic from the recycling symbol:
https://www.goodhousekeeping.com/home/g804/recycling-symbols-plastics-460321/
Design your coil with this:
http://ham-radio.com/k6sti/coil.htm
Brian
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