Doug,

It sounds to me like this may be a good time to supply more information
to the group.  High power, 200 kW, at what frequency?  Are we talking
13.56 MHz, 27.12 MHz, 40.68 MHz or are we discussing 18 GHz?

Just thought that this may change the discussion a tad.


--- "Egon H. Varju" <[email protected]> wrote:
> 
> 
> >Just to add a bit of trivia to this discussion,
> concrete increases
> >substantially in conductivity in the presence of
> ionizing radiation (x-rays,
> >gamma rays).  This is well known and documented in
> the nuclear hardening
> >community.  This is an indication of an inherent
> population of free charge
> >carriers in concrete (be they water-based, or
> other).
> 
> Hmm ...  So, not only will we have to keep the
> garden hose away from that 
> 200 kW power supply, but it may also need a warning
> label:  "FOR USE ONLY 
> IN NUCLEAR-FREE ZONES."
> 
> Egon :-)
> 
> __________________________________________
> 
> Egon H. Varju, PEng
> E.H. Varju & Associates Ltd.
> North Vancouver, Canada
> 
> Tel:   1 604 985 5710                 HAVE MODEM
> Fax:  1 604 273 5815                 WILL TRAVEL
> 
> E-mail:  [email protected]
>          [email protected]
> __________________________________________
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