I use mineral oil; It works fine. Ben, W6FDU In a message dated 2/13/2021
9:24:47 AM Pacific Standard Time, nss@mwt.net writes:
But distilled water is highly corrosive.
I'd worry about what it may pull out of anything it touches.
Joe WB9SBD
On 2/13/2021 11:08 AM, Jim Thomson wrote:
> 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.
>
> Jim VE7RF
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