[Amps] Distilled water in a dummy load ?
dcharing at gmail.com
Mon Feb 22 12:43:30 EST 2021
Not speaking to corrosion, but to heat exchange: the water clearly will be
better, presuming you have corrosion control managed (i.e. no
fouling/corrosion products which reduce heat transfer.
On Sun, Feb 21, 2021 at 3:46 PM MU 4CX250B <4cx250b at miamioh.edu> wrote:
> My instinct is that mineral oil would be a better coolant than
> distilled water, with no corrosion issues. You can buy it at any
> pharmacy, and while it isn’t rated at quite as high a temperature as
> transformer oil, it works quite well. I used it in a Cantenna for 30
> years! As I recall, it was recommended byHeathkit as a substitute for
> transformer oil.
> Jim w8zr
> Sent from my iPhone
> > On Feb 21, 2021, at 1:35 PM, Geert Jan de Groot <pe1hzg at xs4all.nl>
> >> 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
> >> 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
> >> new globar type SP, 12 inches long x 1 inch in diameter.
> > Personally, I'm using the Ameritron ADL2500, which is 4 hefty resistors
> in a case with a fan. I modified it so it automatically switches the fab to
> reduce the noise.
> > No leakage, no corrosion, no mess if I drop it or I kick it. Much
> lighter. No dangerous oils, and my shack doesn't smell like a chip shop
> when I'm doing some testing.
> > 73, Geert Jan PE1HZG
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