At 02:36 PM 2/28/2005, Roger K8RI on Tower wrote:
> > At 01:14 PM 2/28/2005, Jim Jones wrote:
> >>If fresh water is bad then how come dx'ing is better when water table is
>
>Fresh water is a long way from pure. It generally contains a lot of salts
>where as distilled or deionized water is highly corrosive as it *wants*
>metals to create those salts.
>
><snip>
> >>
> >> >>From the ARRL Antenna book:
> >> >
> >> >Surface Type Conductivity (S/m)
>
>Years ago I did a lot of conductivity testing, but it was all in ohms per
>cubic centimeter.
>What's the S?
One's the inverse of the other..
Siemens == mhos
Conductivity is in Siemens/meter (S/m) (or, more commonly for water,
microsiemens/cm)
Resistivity is in ohm meters (or, more commonly for water Megohm-cm)
For instance, cartridge deionizers used for process water often have an
alarm that indicates when resistivity drops below 2 Megohm-cm
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|