I think the problem with water is that it will reflect a lot. Dave really
needs something that has a complex dielectric constant (like water) but
where the magnitude of the constant is close to 1, at the frequency of
interest.

On Thu, Nov 1, 2018 at 10:39 PM <mad.scientist.at.large@tutanota.com> wrote=
:

> Possibly epson salts, magnesium sulphate heptahydrate.  You could probabl=
y
> fill plastic pyrimids with it.  Basically anything with polarized molecul=
es
> and or water that would make a lossy capacitor dielectric.  PVC or CPVC
> might also work well, I'd think lots of plastics.
>
>
--=20
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