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17 Oct 2008

Styrofoam coil form

I wound a coil on a styrofoam form. It appears to function really well. Does anyone know of any issues with a styrofoam form? I plan to use it in a device that is used outdoors. It's Q will be 100 and low inductance. It will also be part of a resonant circuit with circuit Q about 50.
I can't find a bobbin of the size I need. 1.2 x 4 inches. I need the induction field from it to induce a signal into a wire. A 2 x 4 works, but I was afraid that it would absorb moisture. I did notice the styrofoam compressing at the corners as I wound it.

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