If you are
really crazy, use containers of salt water with suitable=20
electrodes in them :-). Just don't knock them over and spill the liquid=
=20
into the machine under test.
Hmm. A home brew dummy load with variable resistance. (Add salt to taste.=
)
Or vary the spacing between the electrodes or the depth that they're
immesed in the brine.
Seriosuly, such things have been used, and while they're better on AC
than DC (due to electrolytic effects), they can be used as PSU dummy
loads. But solid resistors (be they commercial wirewound ones, lengths of
resistance wirte taken from old electric heaters, or filament bulbs) are
a lot easier to handle.
-tony