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[TCML] Coil forms, any good?

Hi all.

I have just struck a little bit of gold, I now have more or less unlimited supply of coil forms in glass fabric, cotton fabric and paper. The resin in these forms are some of the
following: Phenolic, Epoxy, Melamine, Silicone and Polyester.

Are they all good for winding coils on or are there some that i should avoid?
Also if they're good, does the thickness of the wall(RF losses) affect the coil performance
with these materials?

Of course i have seen several on the web using fiberglass so i guess that should be ok
but what about the other materials?

Any input appreciated as i can get any diameter in any length for free. Lucky me....=)

www.tesla.nu (in Swedish)

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