[AMPS] coil form plastics

[Jon Ogden]

>Another great material is Rexolite (crosslinked
>Polystyrene). It make wonderful waveguide windows. Also it makes nice
>insulators in cavities. But is is very brittle, and tough to machine. The
>dielectric properties are not far from PTFE, lightly higher K, and loss is
>maybe 10x, still negligable even to X band.

Rexolite is also outstanding for making circuits with.  You can literally 
cut a grove with just a box knife in copper clad boards and the peel off 
the copper you don't want leaving you a nice microstrip.  Used to make 
antennas all the time with this stuff in the EM Lab at Illinois.

73,

Jon
KE9NA


--------------------------------------------------------------------------
Jon Ogden

jono@enteract.com
www.qsl.net/ke9na

"A life lived in fear is a life half lived."


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