Any ARRL handbook will have a multitude of formulas for you
http://www.booksunderreview.com/Recr...izations/ARRL/

Or Check used book stores or local library

P.S. Formulas don't age so any ARRL Handbook ought to do.


--
73 From The Signal In The Noise
Caveat Lector Ya All

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"Paul" [email protected] wrote in message
...
For U.S. Extra exam are any formulas or tutorials online? I need help
with E5C, E5D, E5E, E9C groups for example. I can barely pass the sample
exam now, and would very much like to be able to calculate a few more
answers. I can't get a current exam manual by the test time this
Saturday. All my radio books are ancient or don't cover this stuff
clearly. Thanks.