At 23.51 2011.10.23, you wrote:
>
>On Oct 22, 2011, at 3:24 PM, Gerhard Fiedler wrote:
>
>> the biggest problem with the use of traditional (not only English or
>> US) units is the tendency of people who use them to work with "magic
>> formulas" and not use proper units with their calculations
>
>You mean like "to get the length of your dipole antenna, divide 468 by =20
>the frequency"?
>(which gives you the length in feet, of course.)  One of the reasons I =20
>never became a ham, sort-of.)

I am Italian and recall instead length in meters =3D 143 / MHz

it's been like fifteen years I didn't hear nor recall this formula. :P



>http://www.radioqth.net/AntennaLength.aspx
>
>I like computing with units, except for (theoretically) needing to =20
>know the units of assorted universal constants, which sometimes get =20
>really ugly...
>
>Not terribly happy that even metric has its variations (cgs vs mks vs =20
>si, for instance.)  But at least if you get those wrong, you're likely =20
>to be off by enough that you'd notice...
>
>BillW
>
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