I wrote: > The tension in pounds is calculated by punching in the following: > > l x f x d x = Ö 20000 = > > where l is the length in CENTIMETRES and f is the frequency in cycles per > second and d is the overall diameter in CENTIMETRES. I repeat centimetres, > NOT millimetres. I forgot to specify the right character set in my last message, so the division sign got mangled. Here is the correct sequence: l x f x d x = ÷ 20000 = JD