Hi:
> Sonotube looks like an over grown paper towel tube and comes in various
> lengths and diameters. It is used as a concrete form.
Sonotube is designed to be a concrete form, it has a heavy coating of
paraffin (WAX) on it's inside. You rip it off when the concrete is set,
it comes off in a spiral fashion.
73 (= Best Regards) de: (= this is) Ron ka4inm@qsl.net
Please visit my HAM web site at: http://www.qsl.net/ka4inm
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