The diameter of a 2 liter bottle is 4 inches. The Bible
says the ratio of circumference to diameter of a circle
is 3. :-) The length of the bottle is about a foot.
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73, Cecil http://www.qsl.net/w5dxp
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Before publishing your rules of thumb you can check your reasoning by
using program SELFRES3. Download from website below.

I must admit, rules of thumb are quite adequate for coaxial chokes.
Almost anything will work. Very often things will work quite well
without a choke at all. ;o)
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Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
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