[Amps] Distilled water in a dummy load ?
jim.thom at telus.net
Sat Feb 13 12:08:49 EST 2021
Is it possible to use distilled water in a hb dummy load ?
DL consist of 4 x 200 ohm globars, wired in parallel..in an 8 gallon container.
I welded 4 x 3 inch OD thick wall Alum pipes together, 2 stacked above 2.
One resistor resides dead center in each alum pipe. Each resistor is a
new globar type SP, 12 inches long x 1 inch in diameter.
For the amount of brief testing I do, and sometimes with low duty cycles, sometimes
high duty cycles, distilled water just might be easier to work with vs xfmr oil.
To be used from 160-10m, no higher freqs.
What I am worried about is the dielectric constant of distilled water. That appears
to be a lot higher than that of xfmr oil. It could add a bunch more stray C to the mix,
esp with each resistor inside its own alum pipe..and pipes welded.
On paper, distilled water should be able to extract heat a lot better than xfmr oil.
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